CN110413978A - Data page deriving method, device, computer equipment and storage medium - Google Patents
Data page deriving method, device, computer equipment and storage medium Download PDFInfo
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- CN110413978A CN110413978A CN201910710933.2A CN201910710933A CN110413978A CN 110413978 A CN110413978 A CN 110413978A CN 201910710933 A CN201910710933 A CN 201910710933A CN 110413978 A CN110413978 A CN 110413978A
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
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Abstract
This application provides a kind of data page deriving method, device, computer equipment and storage mediums, wherein this method comprises: receiving data export request, wherein carry export condition in data export request；It exports and requests in response to data, inquiry meets a plurality of target record of export condition；Obtain default export item number, system has currently used memory and the total memory of system；Determine that paging export is expected to the memory occupied according to default export item number；The memory occupied, system, which are expected to, according to default export item number, paging export has currently determined that paging exports item number using memory and the total memory of system；The target record of paging export item number is exported from a plurality of target record and is stored in file destination.The above method can effectively avoidance system memory overflow, and maximally utilize system resource, final to improve export efficiency and improve user experience.
Description
Technical field
This application involves computer datas to export processing technology field, in particular to a kind of data page deriving method, dress
It sets, computer equipment and storage medium.
Background technique
Currently, types of applications software systems can be used in routine work and life.In general, system generally can all be mentioned in the page
The function of exporting or download for data, export form are varied.The most common export form is exported in the form of two-dimensional table,
Such as one excel list data of export.Data are exported, user's use is very frequent, and data are exported to system
It is convenient that user of service brings, and becomes daily indispensable a part.
However, data export function consumes virutal machine memory very much, if control is improper, it is easy to cause memory spilling event,
So as to cause system crash, and it is big to analyze investigation difficulty.Data export function causes memory and overflows in order to prevent, is usually exporting
Some conventional workarounds can be taken on Functional Design, for example, limiting maximum date section or export by given threshold
Item number, limitation derivation process number of concurrent, the personnel's number for controlling while using export function use the asynchronous export task of submission slightly
All multimodes such as inquiry downloading afterwards.But the less effective of these conventional workarounds, and there are ease for use poor, business
It experiences not good enough and software and hardware resources and uses the problems such as insufficient.
In view of the above-mentioned problems, currently no effective solution has been proposed.
Summary of the invention
The embodiment of the present application provides a kind of data page deriving method, device, computer equipment and storage medium, with solution
Data export method certainly in the prior art not can effectively prevent the problem of memory overflows event.
The embodiment of the present application provides a kind of data page deriving method, comprising: receives data export request, wherein number
Export condition is carried according to exporting in request；It exports and requests in response to data, inquiry meets a plurality of target record of export condition；
Obtain default export item number, system has currently used memory and the total memory of system；Determine that paging exports according to default export item number
It is expected to the memory occupied；According to default export item number, paging export is expected to the memory occupied, system has currently used memory
Determine that paging exports item number with the total memory of system；The target record of paging export item number and deposit are exported from a plurality of target record
In file destination.
In one embodiment, it is expected to that the memory occupied, system currently made according to default export item number, paging export
Determine that paging exports item number with memory and the total memory of system, comprising: the memory for determining that paging export is expected to occupy is worked as with system
It is preceding whether to account for the percentage of the total memory of system less than the first preset percentage using the sum of memory；Determining that paging export is estimated
The memory to be occupied and system have currently accounted for the percentage of the total memory of system less than the first preset percentage using the sum of memory
In the case of, default export item number is determined as paging export item number.
In one embodiment, determining that paging export is expected to the memory occupied and system has currently used the sum of memory
After the percentage of the total memory of system is accounted for whether less than the first preset percentage, further includes: determining that paging export is expected to account for
Memory and system are currently not less than the feelings of the first preset percentage using the percentage that the sum of memory accounts for the total memory of system
Under condition, according to the first preset percentage, default export item number, paging export is expected to the memory occupied, system has currently used
Memory and the total memory of system determine that paging exports item number.
In one embodiment, it is expected in occupancy according to the first preset percentage, default export item number, paging export
It deposits, system has currently determined that paging exports item number using memory and the total memory of system, comprising: determine that paging is led according to following formula
Shaping number:
Wherein, N1Item number, N are exported for paging0For default export item number, FM is the first preset percentage, and M2 is that system is current
Memory is used, M1 is that paging export is expected to the memory occupied, and MA is the total memory of system.
In one embodiment, the target record of paging export item number is being exported from a plurality of target record and is being stored in target
After in file, further includes: repeat the steps of until the total number of derived target record is a plurality of not less than inquiring
The total number of target record: the total number of derived target record is determined；Determining the total number of derived target record is
The no total number less than a plurality of target record inquired；It is less than in the total number that determines derived target record and inquires
In the case where the total number of a plurality of target record, the system of acquisition has currently used memory；It is true that item number is exported according to last round of paging
Determine epicycle paging export and is expected to the memory occupied；It currently is expected to occupy using memory, epicycle paging export according to system
Memory and the total memory of system, determine epicycle paging export item number；Epicycle paging is exported from a plurality of target record exports item number
Target record and be stored in file destination.
In one embodiment, item number is exported according to last round of paging and determines that epicycle paging export is expected in occupancy
It deposits, comprising: obtain the memory of last round of paging export actual use；Determining that the memory of last round of paging export actual use accounts for is
Unite total memory percentage whether less than the second preset percentage；It is accounted in the memory for determining last round of paging export actual use and is
Unite total memory percentage less than the second preset percentage in the case where, determine that last round of paging export item number is led with default maximum
Whether the ratio of shaping number is less than default ratio；In the ratio for determining last round of paging export item number and default maximum export item number
In the case where default ratio, calculates and carry out paging divided by the item number that default ratio obtains according to last round of paging export item number
The estimated memory occupied when export, and the memory being calculated is determined as epicycle paging export and is expected to the memory occupied.
In one embodiment, according to system currently using memory, epicycle paging export be expected to occupy memory and
The total memory of system determines that epicycle paging exports item number, comprising: the memory for determining that epicycle paging export is expected to occupy is worked as with system
It is preceding whether to account for the percentage of the total memory of system less than the first preset percentage using the sum of memory, wherein the first default percentage
Than being greater than the second preset percentage；Determine epicycle paging export be expected to occupy memory and system currently used memory it
With the percentage of the total memory of the system that accounts for less than the first preset percentage in the case where, by last round of paging export item number divided by default
The item number that ratio obtains is determined as epicycle paging export item number.
In one embodiment, determining that epicycle paging export is expected to the memory occupied and system has currently used memory
The sum of whether account for the percentage of the total memory of system less than the first preset percentage after, further includes: determining that epicycle paging exports
It is expected to the memory occupied and system and has currently accounted for the percentage of the total memory of system not less than first default hundred using the sum of memory
In the case where dividing ratio, determine that epicycle paging exports item number according to following formula:
Wherein, NiItem number, N are exported for epicycle pagingi-1Item number is exported for last round of paging, and k is default ratio, FM the
One preset percentage, M2 are that system has currently used memory, and M1 is that epicycle paging export is expected to the memory occupied, and MA is system
Total memory, wherein i is the integer greater than 1.
In one embodiment, determining that the memory of last round of paging export actual use accounts for the percentage of the total memory of system
After whether less than the second preset percentage, further includes: determining that it is total that the memory of last round of paging export actual use accounts for system
In the case that the percentage of memory is not less than the second preset percentage, calculates and led according to last round of paging export item number progress paging
The estimated memory occupied when out, and the memory being calculated is determined as epicycle paging export and is expected to the memory occupied.
In one embodiment, whether small in the ratio for determining last round of paging export item number and default maximum export item number
After default ratio, further includes: be not less than in the ratio for determining that last round of paging export item number and default maximum export item number
In the case where default ratio, calculates and expect the memory occupied when carrying out paging export according to last round of paging export item number, and will
The memory being calculated is determined as epicycle paging export and is expected to the memory occupied.
The embodiment of the present application also provides a kind of data page guiding devices, comprising: receiving module is led for receiving data
It requests out, wherein carry export condition in data export request；Enquiry module is requested for exporting in response to data, inquiry
Meet a plurality of target record of export condition；Obtain module, for obtaining default export item number, system has currently used memory and
The total memory of system；First determining module, for determining that paging export is expected to the memory occupied according to default export item number；Second
Determining module using memory and has been for being expected to the memory occupied, system currently according to default export item number, paging export
Total memory of uniting determines that paging exports item number；Export module, for exporting the target of paging export item number from a plurality of target record
It records and is stored in file destination
The embodiment of the present application also provides a kind of computer equipment, including processor and refers to for storage processor to be executable
The memory of order, the processor realize data page deriving method described in above-mentioned any embodiment when executing described instruction
The step of.
The embodiment of the present application also provides a kind of computer readable storage medium, is stored thereon with computer instruction, the finger
Order is performed the step of realizing data page deriving method described in above-mentioned any embodiment.
In the embodiment of the present application, a kind of data page deriving method is provided, after receiving data export request, is looked into
The a plurality of target record for meeting export condition is ask, the default export item number of acquisition, system have currently used memory and the total memory of system,
And determine that paging export is expected to the memory occupied according to default export item number, and export in advance according to default export item number, paging
It counts the memory to be occupied, system and has currently determined that paging exports item number using memory and the total memory of system, it is a plurality of from what is inquired
The target record of paging export item number is exported in target record and is stored in file destination.In above scheme, according to default export item
Number determines the memory for being expected to occupy, and combine default export item number and be expected to the memory occupied, system used memory with
And the total memory of system determines final paging export item number, realizes and carries out dynamic to record number derived from paging based on free memory
Adjustment can not only effectively avoidance system memory overflow, can also maximize the utilization rate of system resource, greatly improve data
Derived efficiency is simultaneously effectively improved user experience.Solving data export method in the prior art through the above scheme cannot have
The technical issues of effect prevents memory from overflowing event has reached effective avoidance system memory and has overflowed, maximally utilize system resource, mention
Height export efficiency and the technical effect for improving user experience.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, not
Constitute the restriction to the application.In the accompanying drawings:
Fig. 1 shows the schematic diagram of the application scenarios of the data page deriving method in one embodiment of the application；
Fig. 2 shows the flow charts of the data page deriving method in one embodiment of the application；
Fig. 3 shows the process that paging export item number is determined in the data page deriving method in one embodiment of the application
Figure；
Fig. 4 shows the flow chart of the data page deriving method in one embodiment of the application；
Fig. 5 shows the schematic diagram of the data page guiding device in one embodiment of the application；
Fig. 6 shows the schematic diagram of the computer equipment in one embodiment of the application.
Specific embodiment
The principle and spirit of the application are described below with reference to several illustrative embodiments.It should be appreciated that providing this
A little embodiments are used for the purpose of making those skilled in the art can better understand that realizing the application in turn, and be not with any
Mode limits scope of the present application.On the contrary, it is more thorough and complete to these embodiments are provided so that the application discloses, and
And the scope of the present disclosure can be completely communicated to those skilled in the art.
It will be apparent to one skilled in the art that presently filed embodiment can be implemented as a kind of system, appliance arrangement, method
Or computer program product.Therefore, disclose can be with specific implementation is as follows by the application, it may be assumed that complete hardware, complete soft
The form that part (including firmware, resident software, microcode etc.) or hardware and software combine.
Event is overflowed in view of existing data export method not can effectively prevent memory, inventors discovered through research that,
By the item number progress dynamic adjustment based on free memory to record derived from paging, can effectively avoidance system memory overflow,
The utilization rate of system resource is improved simultaneously, and then promotes efficiency derived from data, improves user experience.
Based on this, the embodiment of the present application provides a kind of data page deriving method.Fig. 1 shows one embodiment of the application
In data page deriving method a kind of application scenarios schematic diagram.As shown in Figure 1, user is sent out by user terminal to server
Send data export request.Wherein, export condition is carried in data export request.Server is exported in response to data and is requested, and is looked into
Ask the target record for meeting export condition.Server is based on free memory dynamic and adjusts every wheel paging export item number.Server is pressed
Data page export is carried out according to determining paging export item number, and derived target record is stored in the file destination of user terminal
In, until exporting all qualified target records.
Wherein, above-mentioned user terminal can be desktop computer, notebook, mobile phone terminal, PDA etc., as long as can be to user
Or the equipment that business personnel carries out content displaying and receives operational order is ok, and the presentation of user terminal is formed, this Shen
It please be not construed as limiting.Above-mentioned server can be single server, be also possible to server cluster or Cloud Server etc. all
It can be with specific group is shaped to the application and is also not construed as limiting.
Referring to FIG. 2, Fig. 2 shows the flow charts of data page deriving method in one embodiment of the application.Although this Shen
It please provide as the following examples or method operating procedure shown in the drawings or apparatus structure, but based on conventional or without creating
The labour of property may include more or less operating procedure or modular unit in the method or device.In logicality
In the step of there is no necessary causalities or structure, the execution sequence of these steps or the modular structure of device are not limited to this Shen
It please embodiment description and execution shown in the drawings sequence or modular structure.The dress in practice of the method or modular structure
It sets or end product is in application, can connect carry out sequence execution according to embodiment or method shown in the drawings or modular structure
Either execute (such as environment or even distributed processing environment of parallel processor or multiple threads) parallel.
Specifically, as shown in Fig. 2, the data page deriving method that a kind of embodiment of the application provides may include following step
It is rapid:
Step S201 receives data export request, wherein carries export condition in data export request.
Step S202 is exported in response to data and is requested, and inquiry meets a plurality of target record of export condition.
Receive the export request of Client-initiated data, wherein carry export condition in data export request.For example, with
Family can send data export request by clicking export button.Wherein, export condition is carried out according to actual needs by user
Setting.After receiving data export request, in response to the request, a plurality of target note of export condition is met from data base querying
Record.After inquiring and meeting a plurality of target record of export condition, the total number of a plurality of target record can recorde.
Step S203 obtains default export item number, system has currently used memory and the total memory of system.
Step S204 determines that paging export is expected to the memory occupied according to default export item number.
Wherein, presetting export item number can be the paging export item number of system default.It is determined and is divided according to default export item number
Page export is expected to the memory occupied, that is, calculates and carries out the memory for being expected to occupy when paging export according to default export item number.
Step S205, according to default export item number, paging export is expected to the memory occupied, system has currently used memory
Determine that paging exports item number with the total memory of system.
Step S206 exports the target record of paging export item number from a plurality of target record and is stored in file destination.
After determining that paging export is expected to the memory occupied, it can be exported according to default export item number combination paging pre-
It counts the memory to be occupied, system and has currently determined that paging exports item number using memory and the total memory of system, so that can based on system
Determine that paging exports item number with memory.After determining paging export item number, the export point from a plurality of target directory inquired
The target record of page export item number, and derived target record is stored in file destination.
In above scheme, the memory for being expected to occupy is determined according to default export item number, and combine default export item number and
Be expected to the memory occupied, system has used memory and the total memory of system to determine final paging export item number, realization is based on
Free memory carries out dynamic adjustment to record number derived from paging, can not only effectively avoidance system memory overflow, can be with maximum
The utilization rate for changing system resource, greatly improves efficiency derived from data and is effectively improved user experience.Through the above scheme
It solves data export method in the prior art not and can effectively prevent the technical issues of memory overflows event, reached effective rule
Installed System Memory is kept away to overflow, maximally utilize system resource, improving export efficiency and improve the technical effect of user experience.
In some embodiments of the application, according to default export item number, paging export is expected to the memory occupied, system is worked as
It is preceding to determine that paging exports item number using memory and the total memory of system, it may include: that determining paging export is expected to the interior of occupancy
It deposits and currently whether has accounted for the percentage of the total memory of system less than the first preset percentage using the sum of memory with system；Divide determining
It is pre- less than first that page export is expected to the percentage that the memory occupied and system have currently accounted for the total memory of system using the sum of memory
If in the case where percentage, default export item number is determined as paging export item number.
Wherein, the first preset percentage can be arranged with system performance according to actual needs.For example, the first default percentage
Than that can be 70%, 75%, 80% etc..After determining that paging export is expected to the memory occupied, paging export can be calculated
It is expected to the memory occupied and system currently accounts for the percentage of Installed System Memory using the sum of memory.Then, it is determined that being calculated
Percentage whether less than the first preset percentage.If the percentage being calculated less than the first preset percentage, show according to
Default export item number carries out paging, and export will not there is a situation where memories to overflow.Therefore, default export item number can be determined as
Paging exports item number.Determine that paging exports item number through the above way, memory spilling occurs in the system of can be effectively prevented, increases
Resource utilization ratio.
Further, in some embodiments of the application, work as in the memory for determining that paging export is expected to occupy with system
It is preceding whether account for the percentage of the total memory of system less than the first preset percentage using the sum of memory after, can also include: In
The percentage for determining that paging export is expected to the memory of occupancy and system has currently accounted for the total memory of system using the sum of memory is not small
In the case where the first preset percentage, occupancy is expected to according to the first preset percentage, default export item number, paging export
Memory, system have currently determined that paging exports item number using memory and the total memory of system.
It is understood that currently having been accounted for using the sum of memory in the memory for determining that paging export is expected to occupy with system
In the case that the percentage of the total memory of system is not less than the first preset percentage, shows that system has and the risk that memory overflows occurs.
Therefore, the memory occupied, system can be expected to currently according to the first preset percentage, default export item number, paging export
Determine that paging exports item number using memory and the total memory of system.By the above-mentioned means, data export can be further prevented to cause
Memory overflows.
Further, it in some embodiments of the application, is led according to the first preset percentage, default export item number, paging
Be expected to out occupy memory, system currently using memory and the total memory of system determined paging export item number, may include: by
Determine that paging exports item number according to following formula:
Wherein, N1Item number, N are exported for paging0For default export item number, FM is the first preset percentage, and M2 is that system is current
Memory is used, M1 is that paging export is expected to the memory occupied, and MA is the total memory of system.By the above-mentioned means, can basis
Default export item number, the first preset percentage, system have currently been expected to the memory occupied and system using memory, paging export
Total memory quantitatively determines paging export item number, effectively prevent system that memory occurs and overflows event.
Memory has currently been used according to default export item number, the total memory of system, system and has been divided referring to FIG. 3, Fig. 3 is shown
The memory that page export is expected to occupy determines the flow chart of paging export item number.As shown in figure 3, determining that paging export item number can be with
The following steps are included:
Step 1, default export item number N is obtained0；
Step 2, calculating paging export item number is N0When be expected to occupy memory M1；
Step 3, it obtains system and has currently used memory M2 and the total memory MA of system；
Step 4, it calculates the estimated memory size M1 being applied alone and system accounts for the total memory MA's of system using the sum of memory M2
Percentage F；
Step 5, determine otherwise whether percentage F less than the first preset percentage FM executes step if so, thening follow the steps 6
Rapid 7；
Step 6, by default export item number N0It is determined as paging export item number；
Step 7, N is calculated1=N0× (FM-M2/MA) × MA/M1, and by N1It is determined as paging export item number.
The method of determination paging export item number in above-described embodiment, can be based on free memory dynamic adjustment paging export
Item number, the system that can be effectively prevented occur memory and overflow event, improve resource utilization ratio, improve user experience.
In some embodiments of the application, the target record of paging export item number is being exported from a plurality of target record and is being deposited
It can also include: to repeat the steps of until the total number of derived target record is not less than looking into after entering in file destination
The total number for a plurality of target record ask: the total number of derived target record is determined；Determine derived target record
Total number whether be less than the total number of a plurality of target record inquired；It is small in the total number for determining derived target record
In the case where the total number of a plurality of target record inquired, the system of acquisition has currently used memory；According to last round of paging
Export item number determines that epicycle paging export is expected to the memory occupied；Memory, epicycle paging export have currently been used according to system
It is expected to the memory and the total memory of system occupied, determines that epicycle paging exports item number；Epicycle point is exported from a plurality of target record
The target record of page export item number is simultaneously stored in file destination.
Generally, a plurality of target record inquired can be exported by multiple paging to export.Remember from a plurality of target
The target record of paging export item number is exported in record and is stored in after file destination, needs to judge whether to the paging of next round
Export, until the total number of derived target record is greater than or equal to the total number of a plurality of target record inquired.It is connecing
During each round paging got off is derived, it is first determined the total number of derived target record.For example, for the second wheel
Paging export, the total number of derived target record is that the paging determined in first round paging export process exports item number；It is right
It is exported in third round paging, the total number of derived target record is the paging export determined in the second wheel paging export process
Item number exports item number plus the paging determined in first round paging export process；And so on.Determining derived target note
After the total number of record, determine whether the total number of derived target record is less than total item of a plurality of target record inquired
Number.If so, obtaining the used memory of current time system, i.e. system has currently used memory；Otherwise, terminate epicycle to lead
Out.In the case where determination needs to carry out situation derived from epicycle paging, last round of paging export item number is obtained, and according to last round of paging
Export item number determines that epicycle paging export is expected to the memory occupied.Later, memory, epicycle paging have currently been used according to system
Export is expected to the memory and the total memory of system occupied, determines that epicycle paging exports item number.Finally, remembering in order from a plurality of target
The target record of epicycle paging export item number is exported in record and is stored in file destination, to complete epicycle paging export.It compares
In determined based on the default export item number of system default and free memory epicycle paging export item number can by the above method
To determine epicycle paging export item number according to upper wheel paging export item number and free memory, due to upper wheel paging export and epicycle paging
Export is closer in time, and free memory situation is closer, therefore is determined and can be mentioned based on upper wheel paging export item number
The efficiency that height determines, while resource utilization ratio can also be improved.
In some embodiments of the present application, item number is exported according to last round of paging and determines that epicycle paging export is expected to account for
Memory may include: to calculate to carry out the memory that paging export is expected to occupy according to last round of paging export item number.
In other embodiments of the application, item number is exported according to last round of paging and determines that epicycle paging export is expected to account for
Memory may include: the memory for obtaining last round of paging export actual use；Determine last round of paging export actual use
Memory whether account for the percentage of the total memory of system less than the second preset percentage；Determining last round of paging export actual use
Memory account for the percentage of the total memory of system less than the second preset percentage in the case where, determine last round of paging export item number with
Whether the ratio of default maximum export item number is less than default ratio；Determining last round of paging export item number and default maximum export
In the case that the ratio of item number is less than default ratio, the item obtained according to last round of paging export item number divided by default ratio is calculated
Number carries out the estimated memory occupied when paging export, and the memory being calculated is determined as epicycle paging export and is expected to occupy
Memory.
Specifically, the memory of last round of paging export actual use is obtained, and calculates last round of paging export actual use
Memory account for the percentage of the total memory of system.Determine the percentage being calculated whether less than the second preset percentage.Wherein,
Two preset percentages can be determined with system performance according to actual needs.For example, the second preset percentage can be set to
10%, 20% or 30% etc..In the case where determining the percentage being calculated less than the second preset percentage, show that system provides
Source is more sufficient, it may be considered that increases paging and exports item number.Later, last round of paging export item number and default maximum export are determined
Whether the ratio of item number is less than default ratio.Wherein, default ratio can be set to 1/2,1/3 or 2/5 etc..Above-mentioned value is only
Illustratively, the specific value for presetting ratio can be configured according to actual needs, and the application is not construed as limiting this.In determination
In the case that the ratio of last round of paging export item number and default maximum export item number is less than default ratio, calculate according to last round of
Paging exports the item number that item number is obtained divided by default ratio and carries out the estimated memory occupied when paging export, and will be calculated
Memory is determined as epicycle paging export and is expected to the memory occupied.For example, can calculate when default ratio is 1/2 according to upper
Twice of one wheel paging export item number carries out the estimated memory occupied when paging export, and the memory being calculated is determined as this
Wheel paging export is expected to the memory occupied.By the above-mentioned means, in the last round of paging memory that uses of export and last round of
When item number derived from paging meets above-mentioned condition simultaneously, paging export item number can be properly increased, thus preventing memory from overflowing
While, further increase the utilization rate of system resource.
Further, in some embodiments of the application, currently used memory, epicycle paging export estimated according to system
The total memory of memory and system to be occupied determines that epicycle paging exports item number, may include: that determining epicycle paging export is expected to
Whether the memory of occupancy and system have currently accounted for the percentage of the total memory of system less than the first preset percentage using the sum of memory,
Wherein, the first preset percentage is greater than the second preset percentage；Determine epicycle paging export be expected to occupy memory and be
System is current account for the percentage of the total memory of system less than the first preset percentage using the sum of memory in the case where, by last round of point
The item number that page export item number is obtained divided by default ratio is determined as epicycle paging export item number.
Expect when calculating and carrying out paging export divided by the item number that default ratio obtains according to last round of paging export item number
The memory of occupancy, and by the memory being calculated be determined as epicycle paging export be expected to occupy memory after, determine epicycle
Whether the memory that paging export is expected to occupy currently has been less than using the percentage that the sum of memory accounts for the total memory of system with system
First preset percentage.Wherein, the first preset percentage can be arranged with system performance according to actual needs.For example, first
Preset percentage can be 70%, 75%, 80% etc..In the case where determining percentage is less than the first preset percentage, table
The bright item number obtained according to last round of paging export item number divided by default ratio, which carries out paging export, will not occur memory spilling
Situation.Therefore, last round of paging can be exported to the item number that item number is obtained divided by default ratio and is determined as paging export item number.Example
Such as, in the case where default ratio is 1/2, it is determined as paging export item number for twice of last round of paging export item number.Pass through
Aforesaid way determines that paging exports item number, can further increase in the case where effectivelying prevent system memory spilling occur
Resource utilization ratio.
Further, in some embodiments of the application, determine epicycle paging export be expected to occupy memory and be
System is current whether account for the percentage of the total memory of system less than the first preset percentage using the sum of memory after, can also wrap
It includes: determining that epicycle paging export is expected to the memory occupied and system has currently accounted for the hundred of the total memory of system using the sum of memory
Divide than determining that epicycle paging exports item number according to following formula not less than in the case where the first preset percentage:
Wherein, NiItem number, N are exported for epicycle pagingi-1Item number is exported for last round of paging, and k is default ratio, FM the
One preset percentage, M2 are that system has currently used memory, and M1 is that epicycle paging export is expected to the memory occupied, and MA is system
Total memory, wherein i is the integer greater than 1.Wherein, k can be set to 1/2,1/3 or 2/5 etc..By the above-mentioned means, can determine
It measures and determines that epicycle paging exports item number.
Further, in some embodiments of the application, it is determining that last round of paging exports the memory actually used and accounts for
Unite total memory percentage whether less than the second preset percentage after, can also include: to determine that last round of paging export is real
The memory that border uses accounts for the percentage of the total memory of system not less than in the case where the second preset percentage, calculates according to last round of point
Page exports item number and carries out the estimated memory occupied when paging export, and the memory being calculated is determined as epicycle paging export in advance
Count the memory to be occupied.By the above-mentioned means, not improved when the memory that last round of paging export uses is unsatisfactory for preset condition
Paging exports item number, and memory spilling can be effectively prevented.
Further, in some embodiments of the application, last round of paging export item number and default maximum export are being determined
Whether the ratio of item number is less than after default ratio, can also include: to determine last round of paging export item number and default maximum
In the case that the ratio of export item number is not less than default ratio, when calculating according to last round of paging export item number progress paging export
It is expected that the memory occupied, and the memory being calculated is determined as epicycle paging export and is expected to the memory occupied.By above-mentioned
Mode when the item number derived from last round of paging is unsatisfactory for preset condition, does not improve paging export item number, can be effectively prevented interior
Deposit spilling.
The above method is illustrated below with reference to a specific embodiment, it should be noted, however, that the specific implementation
Example does not constitute an undue limitation on the present application merely to the application is better described.
Referring to FIG. 4, showing the flow chart of the data page deriving method in one embodiment of the application.As shown in figure 4,
Method includes the following steps:
Step 1, data export request is obtained, wherein carry export condition in the data export request；
Step 2, inquiry meet export condition with derived a plurality of target record, and obtain total item of a plurality of target record
Number T；
Step 3, it reads system default paging export item number and single maximum exports item number L；
Step 4, it is determined as system default paging export item number initially to export item number N；
Step 5, it calculates and expects the memory M1 occupied when carrying out paging export according to initial export item number N；
Step 6, it obtains system and has currently used memory M2 and the total memory MA of system；
Step 7, the percentage F of the total memory MA of the sum of memory M1 and memory M2 Zhan is calculated；
Step 8, judge that percentage F whether less than the first preset percentage FM, if so, thening follow the steps 9, otherwise, is executed
Step 10；
Step 9, initial export item number N is determined as epicycle export item number NE, jumps to step 11；
Step 10, N '=N × (FM-M2/MA) × MA/M1 is calculated, and N ' is determined as epicycle export item number NE；
Step 11, paging export is carried out according to epicycle export item number NE and derived target record is stored in file destination
In；
Step 12, the total number P of current derived target record is determined；
Step 13, judge whether total number P is less than the total number T to derived target record, if so, thening follow the steps
14, otherwise, jump to step 18；
Step 14, the memory of epicycle paging export actual use is obtained；
Step 15, judge whether that the memory for meeting epicycle paging export actual use simultaneously accounts for the percentage of the total memory MA of system
Than less than 20% and epicycle paging export item number NE be less than single maximum export item number L half, if so, thening follow the steps
16, otherwise, execute step 17；
Step 16, it is determined as twice of epicycle paging export item number NE initially to export item number N, return step 5；
Step 17, it is determined as epicycle paging export item number NE initially to export item number N, return step 5；
Step 18, terminate.
Paging deriving method in above-described embodiment is adjusted before every wheel paging export according to system free memory dynamic
Whole epicycle paging exports item number, and data export can be effectively prevented and cause memory spilling, meanwhile, it is opened from the second wheel paging export
Begin, the export item number of paging derived from every wheel paging exports in item number and upper wheel paging export actual use according to upper wheel paging
Deposit to determine, it is less in upper wheel paging export item number and using the lower situation of memory under, it is appropriate epicycle paging is turned up to export item
Number improves data and exports efficiency, and improve use so that effectively improving resource utilization ratio while preventing memory from overflowing
Family carries out user experience when data export.
Based on the same inventive concept, a kind of data page guiding device is additionally provided in the embodiment of the present application, it is such as following
Described in embodiment.Since the principle that data page guiding device solves the problems, such as is similar to data page deriving method, data
The implementation of paging guiding device may refer to the implementation of data page deriving method, and overlaps will not be repeated.It is following to be used
, the combination of the software and/or hardware of predetermined function may be implemented in term " unit " or " module ".Although following embodiment institute
The device of description preferably realized with software, but the combined realization of hardware or software and hardware be also may and quilt
Conception.Fig. 5 is a kind of structural block diagram of the data page guiding device of the embodiment of the present application, as shown in Figure 5, comprising: is received
Module 501, obtains module 503, the first determining module 504, the second determining module 505 and export module 506 at enquiry module 502,
The structure is illustrated below.
Receiving module 501 exports request for receiving data, wherein carries export condition in data export request；
Enquiry module 502 is used to export in response to data and request, and inquiry meets a plurality of target record of export condition；
Acquisition module 503 is used to obtain default export item number, system has currently used memory and the total memory of system；
First determining module 504 is used to determine that paging export is expected to the memory occupied according to default export item number；
Second determining module 505 is used for according to default export item number, that paging export is expected to the memory occupied, system is current
Determine that paging exports item number using memory and the total memory of system；
Export module 506 from a plurality of target record for exporting the target record of paging export item number and being stored in target text
In part.
In some embodiments of the application, the second determining module can be specifically used for: determine that paging export is expected to occupy
Memory and system currently whether accounted for the percentage of the total memory of system less than the first preset percentage using the sum of memory；True
Determine paging export and be expected to the memory occupied and system currently to have accounted for the percentage of the total memory of system less than the using the sum of memory
In the case where one preset percentage, default export item number is determined as paging export item number.
In some embodiments of the application, determine paging export be expected to the memory occupied and system currently use it is interior
It can also include: to determine that paging leads after the percentage for accounting for the total memory of system the sum of is deposited whether less than the first preset percentage
It is default not less than first that it is expected to the percentage that the memory occupied and system have currently accounted for the total memory of system using the sum of memory out
In the case where percentage, the memory occupied, system are expected to according to the first preset percentage, default export item number, paging export
Currently determine that paging exports item number using memory and the total memory of system.
In some embodiments of the application, it is expected to account for according to the first preset percentage, default export item number, paging export
Memory, system have currently determined that paging exports item number using memory and the total memory of system, may include: according to following formula
Determine that paging exports item number:
Wherein, N1Item number, N are exported for paging0For default export item number, FM is the first preset percentage, and M2 is that system is current
Memory is used, M1 is that paging export is expected to the memory occupied, and MA is the total memory of system.
In some embodiments of the application, the target record of paging export item number is being exported from a plurality of target record and is being deposited
It can also include: to repeat the steps of until the total number of derived target record is not less than looking into after entering in file destination
The total number for a plurality of target record ask: the total number of derived target record is determined；Determine derived target record
Total number whether be less than the total number of a plurality of target record inquired；It is small in the total number for determining derived target record
In the case where the total number of a plurality of target record inquired, the system of acquisition has currently used memory；According to last round of paging
Export item number determines that epicycle paging export is expected to the memory occupied；Memory, epicycle paging export have currently been used according to system
It is expected to the memory and the total memory of system occupied, determines that epicycle paging exports item number；Epicycle point is exported from a plurality of target record
The target record of page export item number is simultaneously stored in file destination.
In some embodiments of the application, item number is exported according to last round of paging and determines that epicycle paging export is expected to occupy
Memory, may include: the memory for obtaining last round of paging export actual use；Determine last round of paging export actual use
Whether memory accounts for the percentage of the total memory of system less than the second preset percentage；Determining last round of paging export actual use
In the case that memory accounts for the percentage of the total memory of system less than the second preset percentage, last round of paging export item number and pre- is determined
If whether the ratio of maximum export item number is less than default ratio；Determining last round of paging export item number and default maximum export item
In the case that several ratio is less than default ratio, the item number obtained according to last round of paging export item number divided by default ratio is calculated
The estimated memory occupied when paging export is carried out, and the memory being calculated is determined as epicycle paging export and is expected to occupancy
Memory.
In some embodiments of the application, occupancy has currently been expected to using memory, epicycle paging export according to system
Memory and the total memory of system determine that epicycle paging exports item number, may include: that determining epicycle paging export is expected to the interior of occupancy
It deposits and currently whether has accounted for the percentage of the total memory of system less than the first preset percentage using the sum of memory with system, wherein the
One preset percentage is greater than the second preset percentage；Determining that epicycle paging export has been expected to the memory occupied and system currently
In the case where accounting for the percentage of the total memory of system less than the first preset percentage using the sum of memory, last round of paging is exported into item
The item number that number is obtained divided by default ratio is determined as epicycle paging export item number.
In some embodiments of the application, currently make in the memory for determining that epicycle paging export is expected to occupy with system
It can also include: to determine this after whether accounting for the percentage of the total memory of system less than the first preset percentage with the sum of memory
The memory that wheel paging export is expected to occupy currently has been not less than using the percentage that the sum of memory accounts for the total memory of system with system
In the case where first preset percentage, determine that epicycle paging exports item number according to following formula:
Wherein, NiItem number, N are exported for epicycle pagingi-1Item number is exported for last round of paging, and k is default ratio, FM the
One preset percentage, M2 are that system has currently used memory, and M1 is that epicycle paging export is expected to the memory occupied, and MA is system
Total memory, wherein i is the integer greater than 1.
In some embodiments of the application, the total memory of system is accounted in the memory for determining last round of paging export actual use
It can also include: to determine in last round of paging export actual use after whether percentage is less than the second preset percentage
The percentage of the total memory of the system of accounting for is deposited not less than in the case where the second preset percentage, calculates and exports item number according to last round of paging
The estimated memory occupied when paging export is carried out, and the memory being calculated is determined as epicycle paging export and is expected to occupancy
Memory.
In some embodiments of the application, in the ratio for determining last round of paging export item number and default maximum export item number
Whether it is less than after presetting ratio, can also includes: to determine last round of paging export item number and default maximum export item number
In the case that ratio is not less than ratio is preset, calculates and expect occupancy when carrying out paging export according to last round of paging export item number
Memory, and the memory being calculated is determined as epicycle paging export and is expected to the memory occupied.
It can be seen from the above description that the embodiment of the present application realizes following technical effect: in above scheme, root
The memory for being expected to occupy is determined according to default export item number, and is combined default export item number and be expected to the memory occupied, system
It has used memory and the total memory of system to determine final paging export item number, has realized and remembered based on free memory to derived from paging
It records number and carries out dynamic adjustment, can not only effectively avoidance system memory overflow, the utilization rate of system resource can also be maximized, greatly
Ground improves efficiency derived from data and is effectively improved user experience.It solves data in the prior art through the above scheme to lead
Method not can effectively prevent the technical issues of memory overflows event out, has reached effective avoidance system memory and has overflowed, maximizes benefit
With system resource, improves export efficiency and improve the technical effect of user experience.
Embodiment further provides a kind of computer equipments by the application, specifically can be based on the application refering to shown in fig. 6
The computer equipment composed structure schematic diagram for the data page deriving method that embodiment provides, the computer equipment specifically can be with
Including input equipment 61, processor 62, memory 63.Wherein, the memory 63 is used for storage processor executable instruction.Institute
State the step of realizing data page deriving method described in above-mentioned any embodiment when processor 62 executes described instruction.
In the present embodiment, the input equipment, which specifically can be, carries out information exchange between user and computer system
One of main device.The input equipment may include keyboard, mouse, camera, scanner, light pen, writing input board, language
Sound input unit etc.；Input equipment is used to initial data be input in computer with the programs for handling these numbers.The input
Equipment, which can also obtain, receives the data that other modules, unit, equipment transmit.The processor can be by any appropriate
Mode is realized.For example, processor can take such as microprocessor or processor and storage that can be executed by (micro-) processor
Computer readable program code (such as software or firmware) computer-readable medium, logic gate, switch, specific integrated circuit
(Application Specific Integrated Circuit, ASIC), programmable logic controller (PLC) and insertion microcontroller
Form etc..The storage implement body can be in modern information technologies for protecting stored memory device.The storage
Device may include many levels, in digital display circuit, as long as can save binary data can be memory；In integrated electricity
The circuit with store function of Lu Zhong, a not no physical form are also memory, such as RAM, FIFO；In systems, have
There is the storage equipment of physical form to be also memory, such as memory bar, TF card.
In the present embodiment, the function and effect of computer equipment specific implementation, can be with other embodiment pair
According to explanation, details are not described herein.
A kind of computer storage medium based on data page deriving method is additionally provided in the application embodiment, it is described
Computer storage medium is stored with computer program instructions, is performed in the computer program instructions and realizes above-mentioned any reality
The step of applying data page deriving method described in example.
In the present embodiment, above-mentioned storage medium includes but is not limited to random access memory (Random Access
Memory, RAM), read-only memory (Read-Only Memory, ROM), caching (Cache), hard disk (Hard Disk
Drive, HDD) or storage card (Memory Card).The memory can be used for storing computer program instructions.Network is logical
Letter unit can be according to standard setting as defined in communication protocol, for carrying out the interface of network connection communication.
In the present embodiment, the function and effect of the program instruction specific implementation of computer storage medium storage, can
To compare explanation with other embodiment, details are not described herein.
Obviously, those skilled in the art should be understood that each module of above-mentioned the embodiment of the present application or each step can be with
It is realized with general computing device, they can be concentrated on a single computing device, or be distributed in multiple computing devices
On composed network, optionally, they can be realized with the program code that computing device can perform, it is thus possible to by it
Store and be performed by computing device in the storage device, and in some cases, can be held with the sequence for being different from herein
The shown or described step of row, perhaps they are fabricated to each integrated circuit modules or will be multiple in them
Module or step are fabricated to single integrated circuit module to realize.In this way, the embodiment of the present application be not limited to it is any specific hard
Part and software combine.
It should be understood that above description is to illustrate rather than to be limited.By reading above-mentioned retouch
It states, many embodiments and many applications except provided example all will be aobvious and easy for a person skilled in the art
See.Therefore, scope of the present application should not be determined referring to foregoing description, but should referring to preceding claims and this
The full scope of the equivalent that a little claims are possessed determines.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, the embodiment of the present application can have various modifications and variations.Within the spirit and principles of this application, made
Any modification, equivalent substitution, improvement and etc. should be included within the scope of protection of this application.
Claims (13)
1. one kind is based on available JVM memory dynamic adjusting data paging deriving method characterized by comprising
Receive data export request, wherein carry export condition in the data export request；
It exports and requests in response to the data, inquiry meets a plurality of target record of the export condition；
Obtain default export item number, system has currently used memory and the total memory of system；
Determine that paging export is expected to the memory occupied according to the default export item number；
According to the default export item number, paging export is expected to the memory occupied, the system has currently used memory
Determine that paging exports item number with the total memory of the system；
The target record of the paging export item number is exported from a plurality of target record and is stored in file destination.
2. the method according to claim 1, wherein being exported according to the default export item number, the paging pre-
It counts the memory to be occupied, the system and has currently determined that paging exports item number using memory and the total memory of the system, comprising:
It determines and paging export is expected to the memory occupied and the system currently using the sum of memory to have accounted for the system total
Whether the percentage of memory is less than the first preset percentage；
Determining that the paging export is expected to the memory occupied and the system has currently accounted for the system using the sum of memory
In the case that the percentage of total memory is less than first preset percentage, the default export item number is determined as the paging
Export item number.
3. according to the method described in claim 2, it is characterized in that, determine paging export be expected to the memory occupied with
After whether the system currently accounts for the percentage of the total memory of the system less than the first preset percentage using the sum of memory,
Further include:
Determining that the paging export is expected to the memory occupied and the system has currently accounted for the system using the sum of memory
The percentage of total memory is not less than in the case where first preset percentage, according to first preset percentage, described pre-
If export item number, paging export are expected to the memory occupied, the system has currently used memory and the system always interior
It deposits and determines the paging export item number.
4. according to the method described in claim 3, it is characterized in that, according to first preset percentage, the default export
Item number, paging export is expected to the memory occupied, the system has currently used memory and the total memory of the system determines
The paging exports item number, comprising:
Determine that paging exports item number according to following formula:
Wherein, N1Item number, N are exported for the paging0For the default export item number, FM is first preset percentage, and M2 is
The system has currently used memory, and M1 is that paging export is expected to the memory occupied, and MA is the total memory of the system.
5. the method according to claim 1, wherein being led exporting the paging from a plurality of target record
The target record of shaping number and after being stored in file destination, further includes:
It repeats the steps of until the total number of derived target record is not less than total item of a plurality of target record inquired
Number:
Determine the total number of derived target record；
Determine whether the total number of the derived target record is less than the total number of a plurality of target record inquired；
Determining the case where total number of the derived target record is less than the total number of a plurality of target record inquired
Under, the system of acquisition has currently used memory；
Item number, which is exported, according to last round of paging determines that epicycle paging export is expected to the memory occupied；
It currently exports the memory for being expected to occupancy using memory, the epicycle paging according to the system and the system is always interior
It deposits, determines that epicycle paging exports item number；
The target record of the epicycle paging export item number is exported from a plurality of target record and is stored in file destination.
6. according to the method described in claim 5, it is characterized in that, exporting item number according to last round of paging determines that epicycle paging is led
It is expected to the memory occupied out, comprising:
Obtain the memory of last round of paging export actual use；
Determine that whether the memory of the last round of paging export actual use accounts for the percentage of the total memory of the system less than second
Preset percentage；
Determining that the memory of the last round of paging export actual use accounts for the percentage of the total memory of the system and be less than described the
In the case where two preset percentages, determine whether the ratio of the last round of paging export item number and default maximum export item number is small
In default ratio；
In the case where determining that the ratio of the last round of paging export item number and default maximum export item number is less than default ratio,
Calculate estimated when carrying out paging export according to the item number that the last round of paging export item number is obtained divided by the default ratio account for
Memory, and the memory being calculated is determined as epicycle paging export and is expected to the memory occupied.
7. according to the method described in claim 6, it is characterized in that, currently having used memory, the epicycle according to the system
Paging export is expected to the memory and the total memory of the system that occupy, determines that epicycle paging exports item number, comprising:
Determine that the epicycle paging export is expected to the memory occupied and the system has currently accounted for the system using the sum of memory
Unite total memory percentage whether less than the first preset percentage, wherein it is pre- that first preset percentage is greater than described second
If percentage；
Determine epicycle paging export be expected to the memory occupied and the system currently accounted for using the sum of memory it is described
In the case that the percentage of the total memory of system is less than first preset percentage, will the last round of paging export item number divided by
The item number that the default ratio obtains is determined as the epicycle paging export item number.
8. the method according to the description of claim 7 is characterized in that being expected in occupancy determining that the epicycle paging exports
It deposits and currently whether has accounted for the percentage of the total memory of the system less than the first preset percentage using the sum of memory with the system
Later, further includes:
Determine epicycle paging export be expected to the memory occupied and the system currently accounted for using the sum of memory it is described
In the case that the percentage of the total memory of system is not less than first preset percentage, the epicycle point is determined according to following formula
Page export item number:
Wherein, NiItem number, N are exported for the epicycle pagingi-1Item number is exported for the last round of paging, k is the default ratio,
FM is first preset percentage, and M2 is that the system has currently used memory, and M1 is that epicycle paging export is expected to
The memory of occupancy, MA are the total memory of the system, wherein i is the integer greater than 1.
9. according to the method described in claim 6, it is characterized in that, determining in the last round of paging export actual use
After the percentage for accounting for the total memory of the system is deposited whether less than the second preset percentage, further includes:
The percentage of the total memory of the system is accounted for not less than second in the memory for determining the last round of paging export actual use
In the case where preset percentage, calculate in expecting to occupy when carrying out paging export according to the last round of paging export item number
It deposits, and the memory being calculated is determined as epicycle paging export and is expected to the memory occupied.
10. according to the method described in claim 6, it is characterized in that, determining the last round of paging export item number and presetting
Whether the ratio of maximum export item number is less than after default ratio, further includes:
Determining the case where ratio of the last round of paging export item number and default maximum export item number is not less than default ratio
Under, calculate the estimated memory occupied when carrying out paging export according to the last round of paging export item number, and will be calculated
Memory is determined as epicycle paging export and is expected to the memory occupied.
11. a kind of data page guiding device characterized by comprising
Receiving module, for receiving data export request, wherein carry export condition in the data export request；
Enquiry module is requested for exporting in response to the data, and inquiry meets a plurality of target record of the export condition；
Module is obtained, for obtaining default export item number, system has currently used memory and the total memory of system；
First determining module, for determining that paging export is expected to the memory occupied according to the default export item number；
Second determining module, for being expected to the memory occupied, the system according to the default export item number, paging export
System is current to determine that paging exports item number using memory and the total memory of the system；
Export module, for exporting the target record of the paging export item number from a plurality of target record and being stored in target
In file.
12. a kind of computer equipment, which is characterized in that including processor and for the storage of storage processor executable instruction
The step of device, the processor realizes any one of claims 1 to 10 the method when executing described instruction.
13. a kind of computer readable storage medium, is stored thereon with computer instruction, which is characterized in that described instruction is performed
The step of Shi Shixian any one of claims 1 to 10 the method.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111143462A (en) * | 2019-12-31 | 2020-05-12 | 广州酷旅旅行社有限公司 | Data export method and device, computer equipment and storage medium |
| CN111460021A (en) * | 2020-04-03 | 2020-07-28 | 中国建设银行股份有限公司 | Data export method and device |
| CN113779122A (en) * | 2021-02-19 | 2021-12-10 | 北京京东振世信息技术有限公司 | Method and apparatus for exporting data |
| CN114217748A (en) * | 2021-12-17 | 2022-03-22 | 中国建设银行股份有限公司 | Data export method, device, equipment, medium and product |
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| CN111460021B (en) * | 2020-04-03 | 2024-01-19 | 中国建设银行股份有限公司 | Data export method and device |
| CN113779122A (en) * | 2021-02-19 | 2021-12-10 | 北京京东振世信息技术有限公司 | Method and apparatus for exporting data |
| CN113779122B (en) * | 2021-02-19 | 2023-11-03 | 北京京东振世信息技术有限公司 | Method and device for exporting data |
| CN114217748A (en) * | 2021-12-17 | 2022-03-22 | 中国建设银行股份有限公司 | Data export method, device, equipment, medium and product |
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