CN106603695B - Method and device for adjusting query rate per second - Google Patents
Method and device for adjusting query rate per second Download PDFInfo
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- CN106603695B CN106603695B CN201611234724.8A CN201611234724A CN106603695B CN 106603695 B CN106603695 B CN 106603695B CN 201611234724 A CN201611234724 A CN 201611234724A CN 106603695 B CN106603695 B CN 106603695B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
- H04L67/62—Establishing a time schedule for servicing the requests
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/50—Allocation of resources, e.g. of the central processing unit [CPU]
- G06F9/5005—Allocation of resources, e.g. of the central processing unit [CPU] to service a request
Abstract
The embodiment of the invention discloses a method and a device for adjusting query rate per second, which are applied to a server, wherein the method comprises the following steps: determining the processing capacity of the server in the second before the current second; determining whether an adjustment condition for increasing the query rate per second of the current second is met or not according to the processing capacity; and if so, increasing the query rate per second of the current second. By applying the embodiment of the invention, the maximum processing capacity of the server is dynamically changed in real time, and the processing capacity of the server in the second before the current second is closest to the processing capacity of the server in the current second, so that the method can be used for evaluating the maximum processing capacity of the server; compared with the prior art that the QPS set for the server is possibly smaller than the maximum processing capacity of the server, the query rate per second adjusted by the embodiment of the invention can reach the maximum processing capacity of the server, thereby avoiding the waste of server resources.
Description
Technical Field
The invention relates to the field of server management, in particular to a method and a device for adjusting query rate per second.
Background
The Query Per Second (Query Per Second, abbreviated as QPS) represents the number of requests received by the server Per Second. In practical applications, if the server does not set the QPS, the server will always receive requests, and when the number of requests received by the server is greater than the maximum processing capacity of the server, the response speed of the server will be slow, so that the QPS needs to be set for the server.
Currently, the main ways to set the QPS of a server are: and manually evaluating the maximum processing capacity of the server in advance, and setting a fixed QPS according to an evaluation result. However, due to the influence of network conditions and other factors, the maximum processing capacity of the server may dynamically change in real time, and at this time, the set QPS may be too small, so that the server does not reach the maximum processing capacity (i.e., the server has the capacity to receive and process requests), and the resource of the server is wasted.
Disclosure of Invention
The embodiment of the invention aims to provide a method and a device for adjusting the query rate per second so as to avoid the waste of server resources.
In order to achieve the above object, an embodiment of the present invention discloses a method for adjusting a query rate per second, which is applied to a server, and the method includes:
determining the processing capacity of the server in the second before the current second;
determining whether an adjustment condition for increasing the query rate per second of the current second is met or not according to the processing capacity;
and if so, increasing the query rate per second of the current second.
Preferably, the determining the processing capacity of the server in the second previous to the current second includes:
determining the processing capacity of the server in the second before the current second by using the following formula:
procap＝qps_out+qps_proces sin g；
wherein, procap is the processing capacity of the server in the second before the current second; qps _ out is the number of requests completed by the server in the second preceding the current second; qps _ process sin g is the number of requests the server is processing at the end of the second preceding the current second; and qps _ process sin g qps _ out medium _ time, which is the median of the time it takes for the server to process all requests in the second preceding the current second.
Preferably, the adjusting condition includes:
the number of requests received by the server in the second before the current second is less than the processing capacity of the server in the second before the current second, and/or the difference between the median of all requests processed by the server in the second before the current second and the median of all requests processed by the server in the second before the current second is greater than or equal to zero and less than a preset threshold.
Preferably, the adjusting condition includes:
the number of requests received by the server in the second before the current second is smaller than the processing capacity of the server in the second before the current second, and at least the number of requests received by the server in the second before the current second is smaller than the processing capacity in a preset second number of seconds.
Preferably, the increasing the query rate per second of the current second includes:
and adjusting the query rate per second of the current second to the processing capacity of the server in the second before the current second.
Preferably, in the case that the adjustment condition is not satisfied, the method further includes:
and turning down the query rate per second of the current second.
In order to achieve the above object, an embodiment of the present invention provides an apparatus for adjusting a query rate per second, where the apparatus is applied to a server, and the apparatus includes: a first determination module, a second determination module, and a first adjustment module, wherein,
the first determining module is used for determining the processing capacity of the server in the second before the current second;
the second determining module is configured to determine whether an adjustment condition for increasing the query rate per second of the current second is satisfied according to the processing capability;
the first adjusting module is used for increasing the query rate per second of the current second under the condition that the adjusting condition for increasing the query rate per second of the current second is met.
Preferably, the first determining module is specifically configured to:
determining the processing capacity of the server in the second before the current second by using the following formula:
procap＝qps_out+qps_proces sin g；
wherein, procap is the processing capacity of the server in the second before the current second; qps _ out is the number of requests completed by the server in the second preceding the current second; qps _ process sin g is the number of requests the server is processing at the end of the second preceding the current second; and qps _ process sin g qps _ out medium _ time, which is the median of the time it takes for the server to process all requests in the second preceding the current second.
Preferably, the adjusting condition includes:
the number of requests received by the server in the second before the current second is less than the processing capacity of the server in the second before the current second, and/or the difference between the median of all requests processed by the server in the second before the current second and the median of all requests processed by the server in the second before the current second is greater than or equal to zero and less than a preset threshold.
Preferably, the adjusting condition includes:
the number of requests received by the server in the second before the current second is smaller than the processing capacity of the server in the second before the current second, and at least the number of requests received by the server in the second before the current second is smaller than the processing capacity in a preset second number of seconds.
Preferably, the first adjusting module is specifically configured to:
and adjusting the query rate per second of the current second to the processing capacity of the server in the second before the current second.
Preferably, the apparatus further includes a second adjustment module, configured to adjust the query rate per second of the current second to be smaller if the adjustment condition is not satisfied.
The embodiment of the invention provides a method and a device for adjusting query rate per second, which are applied to a server, wherein the method comprises the following steps: determining the processing capacity of the server in the second before the current second; determining whether an adjustment condition for increasing the query rate per second of the current second is met or not according to the processing capacity; and if so, increasing the query rate per second of the current second.
By applying the embodiment of the invention, the maximum processing capacity of the server is dynamically changed in real time, and the processing capacity of the server in the second before the current second is closest to the processing capacity of the server in the current second, so that the method can be used for evaluating the maximum processing capacity of the server; compared with the prior art that the QPS set for the server is possibly smaller than the maximum processing capacity of the server, the query rate per second adjusted by the embodiment of the invention can reach the maximum processing capacity of the server, thereby avoiding the waste of server resources.
Of course, it is not necessary for any product or method of practicing the invention to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart illustrating a method for adjusting a query rate per second according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating another method for adjusting the query rate per second according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an apparatus for adjusting a query rate per second according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another apparatus for adjusting an inquiry rate per second according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to solve the problem of the prior art, embodiments of the present invention provide a method and an apparatus for adjusting a query rate per second. First, a method for adjusting the query rate per second according to an embodiment of the present invention is described below.
It should be noted that, the method and the apparatus for adjusting the query rate per second provided by the embodiments of the present invention are preferably applied to a server.
Fig. 1 is a schematic flow chart of a method for adjusting a query rate per second according to an embodiment of the present invention, which may include:
s101: determining a processing power of the server for a second previous to a current second.
Specifically, the processing capacity of the server in the second before the current second is determined by using the following formula:
procap＝qps_out+qps_proces sin g；
wherein, procap is the processing capacity of the server in the second before the current second; qps _ out is the number of requests completed by the server in the second preceding the current second; qps _ process sin g is the number of requests the server is processing at the end of the second preceding the current second; and qps _ process sin g qps _ out medium _ time, which is the median of the time it takes for the server to process all requests in the second preceding the current second.
In practical application, the server stores a red-black tree, the red-black tree has at least one node, and the node stores the number of requests received in each second of at least the first two seconds of the current second, the number of processed requests, and the median data of all requests processed in each second.
Assuming that the server needs to adjust the query rate per second for the 10 th second, the server determines the corresponding Redwood node based on the uri of the received request. The server determines the processing capacity of the server at the 9 th second according to the data stored in the red-black tree by using the following formula:
procap＝qps_out+qps_proces sin g；
wherein, procap is the processing capacity of the server in the 9 th second; qps _ out is the number of requests processed by the server in the 9 th second; qps _ process sin g is the number of requests the server is processing at the end of 9 seconds in the ground; and qps _ process g qps _ out medium _ time, which is the median number of times the server takes to process all requests at second 9.
Note that, in determining the processing capability at the 9 th second, when the medium _ time is greater than or equal to 500 milliseconds, the value of the medium _ time is assigned to zero and substituted into the above formula.
Suppose that the determined processing capacity at the 9 th second is n9。
It is emphasized that the number of requests received per second, the number of requests processed, and the median data taken to process all requests per second, for at least the first two seconds of the current second, may also be stored in, but not limited to, a database or other form of file. The servers are backend servers including, but not limited to, nginx servers (high performance HTTP and reverse proxy servers).
S102: determining whether an adjustment condition for increasing the query rate per second of the current second is met or not according to the processing capacity; if so, S103 is executed.
Specifically, the adjustment condition of the query rate per second of the current second may be: the number of requests received by the server in the second before the current second is less than the processing capacity of the server in the second before the current second, and/or the difference between the median of all requests processed by the server in the second before the current second and the median of all requests processed by the server in the second before the current second is greater than or equal to zero and less than a preset threshold.
It should be noted that, the median of all the request consumed time processed by the server in the second before the current second may be determined according to the statistical histogram of all the request consumed time processed by the server in the second before the current second.
In practical applications, it is assumed that the number of requests received by the server in the 9 th second is m9The preset threshold is 10 milliseconds. The adjustment condition may be the number m of requests received by the server in the 9 th second9Processing capacity n less than 9 th second9(ii) a Or the server processes all the requests in the 9 th second by the median t9Subtracting the median consumed time of the server for processing all the requests in the 8 th second to obtain a value less than 10 milliseconds; or the number m of requests received by the server in the 9 th second9Processing capacity n less than 9 th second9And the server processes all the requests in the 9 th second by the median t9Subtract the median t of the time taken for the server to process all requests in the 8 th second8The resulting value is less than 10 milliseconds.
Specifically, the adjustment condition of the query rate per second of the current second may further be: the number of requests received by the server in the second before the current second is smaller than the processing capacity of the server in the second before the current second, and at least the number of requests received by the server in the second before the current second is smaller than the processing capacity in a preset second number of seconds.
In practical applications, it is assumed that the first number of seconds is 3 seconds and the second number of seconds is 1 second. The adjustment conditions may be: number of requests m received by the server in 9 th second9Less than the server's processing capacity n at 9 seconds9And the number of requests received by the server for at least 1 second in the first 3 seconds (9 th, 8 th and 7 th seconds) of the 10 th second is less than the processing capacity.
S103: and increasing the query rate per second of the current second.
Specifically, the query rate per second of the current second may be adjusted to the processing capacity of the server in the second previous to the current second.
In practical application, the query rate per second of the 10 th second is adjusted to the processing capacity n of the server in the 9 th second10＝n9。
The number m of requests received by the server in the 10 th second may also be counted at the end of the 10 th second10The number of requests n processed10And a median t of the time it takes to process all requests per second10And storing the data into nodes in the corresponding red and black trees, or a database, or other files.
With the embodiment of the invention shown in fig. 1, since the maximum processing capacity of the server is dynamically changed in real time, the processing capacity of the server in the second before the current second is closest to the processing capacity of the server in the current second, the maximum processing capacity of the server can be evaluated; compared with the prior art that the QPS set for the server is possibly smaller than the maximum processing capacity of the server, the query rate per second adjusted by the embodiment of the invention can reach the maximum processing capacity of the server, thereby avoiding the waste of server resources.
Fig. 2 is a schematic flow chart of another method for adjusting the query rate per second according to an embodiment of the present invention. The embodiment shown in fig. 2 is added with S104 on the basis of the embodiment shown in fig. 1: and in the case that the adjusting condition is not met, adjusting the query rate per second of the current second to be smaller.
Specifically, in the case where the determination result in S102 is no, the query rate per second for the 10 th second is turned down.
By applying the embodiment shown in fig. 2 of the invention, when the adjustment condition is not satisfied, the query rate of the server in the current second per second is reduced, so that the server does not receive the request which cannot be processed, and the pressure of the server is further reduced.
Corresponding to the embodiment shown in fig. 1, fig. 3 is a schematic structural diagram of an apparatus for adjusting a query rate per second according to an embodiment of the present invention, which may include: a first determination module 301, a second determination module 302, and a first adjustment module 303, wherein,
a first determining module 301, configured to determine a processing capability of the server in a second previous to a current second.
Specifically, the first determining module 301 is specifically configured to:
determining the processing capacity of the server in the second before the current second by using the following formula:
procap＝qps_out+qps_processin g；
wherein, procap is the processing capacity of the server in the second before the current second; qps _ out is the number of requests completed by the server in the second preceding the current second; qps _ process sin g is the number of requests the server is processing at the end of the second preceding the current second; and qps _ process sin g qps _ out medium _ time, which is the median of the time it takes for the server to process all requests in the second preceding the current second.
A second determining module 302, configured to determine whether an adjustment condition for increasing the query rate per second of the current second is satisfied according to the processing capability; if so, trigger 303.
Specifically, the adjustment condition may include:
the number of requests received by the server in the second before the current second is less than the processing capacity of the server in the second before the current second, and/or the difference between the median of all requests processed by the server in the second before the current second and the median of all requests processed by the server in the second before the current second is greater than or equal to zero and less than a preset threshold.
Specifically, the adjustment condition may include:
the number of requests received by the server in the second before the current second is smaller than the processing capacity of the server in the second before the current second, and at least the number of requests received by the server in the second before the current second is smaller than the processing capacity in a preset second number of seconds.
The first adjusting module 303 adjusts the query rate per second of the current second to be larger.
Specifically, the first adjusting module 303 is specifically configured to:
and adjusting the query rate per second of the current second to the processing capacity of the server in the second before the current second.
With the embodiment of the present invention shown in fig. 3, since the maximum processing capacity of the server is dynamically changed in real time, the processing capacity of the server in the second before the current second is closest to the processing capacity of the server in the current second, so that the maximum processing capacity of the server can be evaluated; compared with the prior art that the QPS set for the server is possibly smaller than the maximum processing capacity of the server, the query rate per second adjusted by the embodiment of the invention can reach the maximum processing capacity of the server, thereby avoiding the waste of server resources.
Fig. 4 is a schematic structural diagram of another apparatus for adjusting an inquiry rate per second according to an embodiment of the present invention. The embodiment of the present invention shown in fig. 4 is added with a second adjusting module 304 on the basis of the embodiment of the present invention shown in fig. 3, and is used for adjusting the query rate per second of the current second to be smaller under the condition that the adjusting condition is not satisfied.
By applying the embodiment shown in fig. 4 of the present invention, when the adjustment condition is not satisfied, the query rate per second of the server at the current second is reduced, so that the server does not receive the request which cannot be processed, thereby reducing the pressure of the server.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
Those skilled in the art will appreciate that all or part of the steps in the above method embodiments may be implemented by a program to instruct relevant hardware to perform the steps, and the program may be stored in a computer-readable storage medium, which is referred to herein as a storage medium, such as: ROM/RAM, magnetic disk, optical disk, etc.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (6)
1. A method for adjusting query rate per second is applied to a server, and the method comprises the following steps:
determining the processing capacity of the server in the second before the current second;
determining whether an adjustment condition for increasing the query rate per second of the current second is met or not according to the processing capacity; the adjusting conditions comprise: the difference value between the median of all the request consumed time of the server in the second before the current second and the median of all the request consumed time of the server in the second before the current second is greater than or equal to zero and less than a preset threshold value;
if yes, increasing the query rate per second of the current second;
the determining the processing capacity of the server in the second previous to the current second comprises:
determining the processing capacity of the server in the second before the current second by using the following formula:
procap＝qps_out+qps_processing；
wherein, procap is the processing capacity of the server in the second before the current second; qps _ out is the number of requests completed by the server in the second preceding the current second; qps _ processing is the number of requests the server is processing at the end of the second preceding the current second; and qps _ processing qps _ out _ medium _ time, which is the median of the time it takes for the server to process all requests in the second preceding the current second.
2. The method of claim 1, wherein the adjusting the query rate per second for the current second up comprises:
and adjusting the query rate per second of the current second to the processing capacity of the server in the second before the current second.
3. The method according to claim 1, wherein in case the adjustment condition is not met, the method further comprises:
and turning down the query rate per second of the current second.
4. An apparatus for adjusting query rate per second, applied to a server, the apparatus comprising: a first determination module, a second determination module, and a first adjustment module, wherein,
the first determining module is used for determining the processing capacity of the server in the second before the current second;
the second determining module is configured to determine whether an adjustment condition for increasing the query rate per second of the current second is satisfied according to the processing capability; the adjusting conditions comprise: the difference value between the median of all the request consumed time of the server in the second before the current second and the median of all the request consumed time of the server in the second before the current second is greater than or equal to zero and less than a preset threshold value;
the first adjusting module is used for increasing the query rate per second of the current second under the condition that the adjusting condition for increasing the query rate per second of the current second is met;
the first determining module is specifically configured to:
determining the processing capacity of the server in the second before the current second by using the following formula:
procap＝qps_out+qps_processing；
wherein, procap is the processing capacity of the server in the second before the current second; qps _ out is the number of requests completed by the server in the second preceding the current second; qps _ processing is the number of requests the server is processing at the end of the second preceding the current second; and qps _ processing qps _ out _ medium _ time, which is the median of the time it takes for the server to process all requests in the second preceding the current second.
5. The device according to claim 4, wherein the first adjusting module is specifically configured to:
and adjusting the query rate per second of the current second to the processing capacity of the server in the second before the current second.
6. The apparatus of claim 4, further comprising a second adjustment module configured to adjust the query rate per second of the current second to be smaller if the adjustment condition is not satisfied.
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