JPH0553882A - Memory dump collecting system - Google Patents

Abstract

PURPOSE:To reduce a memory dump output amount and to shorten memory dump output time. CONSTITUTION:A system down process identifier preserving means 1 preserves the process identifier of a process generating system down. Based on the process identifier preserved in the system down process identifier preserving means 1, a system down relative process identifier selecting means 2 selects the process identifier of a process which is related to the process generating the system down and existent in a main storage device 5 in the case of the system down. The memory image of a selected process 4 (a process having the process identifier preserved by the system down process identifier preserving means 1 and selected by the system down relative process identifier selecting means 2) is outputted from the main storage device 5 to a second-order storage device 6 by a memory damp output means 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a memory dump collecting method, and more particularly to a memory dump collecting method at the time of system down in a computer system having a relatively large capacity memory (main memory).

[0002]

2. Description of the Related Art Conventionally, in this type of memory dump collection method, the memory images of all processes existing in the main memory when the system is down (all processes loaded in the main memory when the system is down) are stored in the main memory. It was output (dump output) from the device to the secondary storage device.

[0003]

In the conventional memory dump collection method described above, since the memory images of all processes existing in the main memory are output from the main memory to the secondary memory when the system is down, In a computer system having a relatively large capacity memory, a large capacity secondary storage device is required for memory dump output (memory image dump output), resulting in a huge memory dump output time (hence, It takes a lot of time to restart the computer system after the system goes down).

In view of the above points, an object of the present invention is to reduce the amount of memory dump output, to save the capacity of the secondary storage device for memory dump output, and to shorten the memory dump output time. It is an object of the present invention to provide a memory dump collection method that can reduce the time required to restart the computer system.

[0005]

A memory dump collecting method of the present invention is a system down process identifier for storing a process identifier of a process causing a system down in a memory dump collecting method for collecting a memory dump at the time of system down. Saving means and a system down related process for selecting a process identifier of a process that has caused a system down based on the process identifier saved by the system down process identifier saving means and that exists in the main storage device at the time of system down Process identifier selecting means, a memory image of a process having a process identifier stored by the system down process identifier storing means, and a process identification selected by the system down related process identifier selecting means And outputs the secondary storage device from the main memory to the memory image of the process with and a memory dump output means.

[0006]

In the memory dump collecting method of the present invention, the system down process identifier saving means saves the process identifier of the process causing the system down, and the system down related process identifier selecting means is saved by the system down process identifier saving means. A process identifier associated with the process that caused the system down based on the process identifier, and is selected by the process identifier of the process existing in the main storage device at the time of system down, and the memory dump output means stores the process down identifier And the memory image of the process having the process identifier selected by the system down related process identifier selecting means are output from the main storage device to the secondary storage device.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the memory dump collecting system of the present invention. The memory dump collection method of the present embodiment causes a system down based on the system down process identifier saving means 1 that saves the process identifier of the process that caused the system down, and the process identifier saved by the system down process identifier saving means 1. System down related process identifier selecting means 2 for selecting a process identifier of a process which is a process related to the existing process and exists in the main storage device 5 at the time of system down, and a main in response to a request from the system down related process identifier selecting means 2. Memory dump output means 3 for outputting (dump output) a memory image of the selected process 4 (process causing system down and process related to the process) on the storage device 5 from the main storage device 5 to the secondary storage device 6. , Select pro Main memory 5 in which the memory 4 exists (processes other than the selected process 4 also exist in the main memory 5), and a secondary memory 6 for outputting a memory dump (magnetic tape device, magnetic disk device, etc.) It is configured to include and. In addition, "a process related to a certain process" means
A process that controls and exchanges data with a process.

Next, the operation of the memory dump collecting method of this embodiment having the above-mentioned configuration will be described.

When the system is down, the system down process identifier saving means 1 saves the process identifier of the process causing the system down.

The system down related process identifier selecting means 2 is a process related to the process causing the system down based on the process identifier stored by the system down process identifier storing means 1 and exists in the main storage device 5 at the time of system down. Select the process identifier of the process to be executed. This selection is performed based on the "correspondence information between the process identifier and the related process group identifier" which is set in the system down related process identifier selecting means 2 in advance. Here, the “correspondence information between the process identifier and the related process group identifier” is the correspondence information between the process identifier of each process and the identifier of the group to which the process having the process identifier belongs (a group of a group of mutually related processes). Say.

Further, the system down related process identifier selecting means 2 has a process having the process identifier selected as described above and a process causing the system down (system down process identifier storing means 1).
The process of requesting the memory dump output means 3 to output the memory dump of the memory image of the selected process 4 corresponding to the process having the process identifier stored by the above).

The memory dump output means 3 outputs the memory image of the selected process 4 on the main storage device 5 to the secondary storage device 6 in response to the above-mentioned request from the system down related process identifier selection means 2.

As a result of the above processing, the process targeted for memory dump output is limited to the selected process 4, so the amount of memory dump output to the secondary storage device 6 can be reduced, and a large memory dump output is required. It is not necessary to prepare the secondary storage device 6 having a capacity, the memory dump output time can be shortened, and the time until the computer system to which this embodiment is applied can be restarted can be shortened.

If there is a process necessary for analyzing a failure (system down) in addition to the selection process 4, a process different from the system down related process identifier selecting means 2 selects such a process. If this is possible, the memory image of such a process can be output to the memory dump output means 3 together with the memory image of the selected process 4.

[0016]

As described above, according to the present invention, the memory dump output amount is reduced by selectively outputting only the memory image of the process necessary for analyzing the failure (system down) at the time of outputting the memory dump. It is not necessary to prepare a large capacity secondary storage device for memory dump output, the memory dump output time can be shortened, and the time until the computer system is restarted can be shortened. There is an effect that can be.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an exemplary embodiment of the present invention.

[Explanation of symbols]

 1 system down process identifier storage means 2 system down related process identifier selection means 3 memory dump output means 4 selection process 5 main storage device 6 secondary storage device

Claims (1)

[Claims] 1. A memory dump collecting method for collecting a memory dump at the time of system down, and a system down process identifier saving means for saving a process identifier of a process causing a system down, and saving by this system down process identifier saving means. System down related process identifier selecting means for selecting a process identifier of a process which is related to a process causing a system down based on the generated process identifier and exists in the main storage device at the time of system down, and the system down process identifier storing means The memory image of the process having the process identifier stored by the above and the memory image of the process having the process identifier selected by the system down related process identifier selecting means are stored in the main storage device. And a memory dump output means for outputting to a secondary storage device.