JPH04175938A - Dump acquisition quantity reduction system - Google Patents

Abstract

PURPOSE:To decrease a dump acquisition quantity by registering exit programs specifying areas whose dump acquisition is not necessary for a program acquiring a dump, by on-line systems, and not acquiring the dump of an area specified by an exit program in an area that an on-line system uses. CONSTITUTION:If an on-line process 1 ends abnormally, the control is passed to the dump acquisition program 2. The dump acquisition program 2 executes a dump acquisition range determining process 2a for the area of an OS specified with the system parameter of the OS. Then it is judged that an exit is registered in the dump acquisition program 2, the control is passed to the exit program 3 in an exit process 2b. The exit program 3 performs a process for setting the head address and tail address of an unnecessary range which need not be acquired because write protection is set in the area of the program used by the on-line process 1. Consequently, since the dump acquisition quantity is decreased, the dump acquisition time is shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for reducing the amount of memory dump obtained when the system terminates abnormally in a computer online system using a computer.

[Conventional technology]

A conventional method for reducing the memory dump acquisition layer of a computer system is disclosed in, for example, Japanese Patent Laid-Open No. 2-109147.

This method determines whether the privileged process identification flag is set when the system terminates abnormally, and performs a full memory dump of the corresponding space for the privileged process, and a memory dump of the entire area of the corresponding space for the non-privileged process. The aim was to collect memory dumps of the control area of the system and reduce the amount of memory dumps, but the only way to reduce the amount of dumps was by identifying processes.

[Problem to be solved by the invention]

In the above-mentioned conventional technology, there is no means for the O8 subsystem, such as an online system, to freely determine the range of memory dump acquisition when the system terminates abnormally, and there is a problem in that a detailed memory dump cannot be acquired.

The present invention reduces the amount of dumps obtained by providing a means for the online system to independently specify in advance areas where dumps do not need to be obtained, regarding the system common area that occupies most of the areas managed by O8 when obtaining dumps. The aim is to reduce

[Means to solve the problem]

In order to achieve the above purpose, the memory dump acquisition program is provided with an exit function, and when the online system terminates abnormally, by registering a program that determines areas that do not require dump acquisition, the memory dump acquisition program is provided with an exit function. This prevents the area from being dumped.

As a result, areas in the system common area that are write-protected and are not likely to be destroyed, etc.
There is no longer a need to obtain dumps as unnecessary areas, making it possible to reduce the amount of dumps obtained.

[Effect]

When the exit program registered in the dump acquisition program terminates abnormally, the system is configured to acquire a dump of the entire system common area as before, so there is no possibility that no dump will be acquired at all.

In addition, if the exit program does not operate correctly, such as when there is an error in the information specified by the exit program, a full-area dump is also obtained.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

When an abnormal termination occurs in online processing 1, control is passed to dump acquisition program 2. In the dump acquisition program 2, first, the ○S specified in the O8 system parameters is
Dump acquisition range determination processing 2a for the area is executed. Next, when it is determined that the exit has been registered in the dump acquisition program 2, control is transferred to the exit program 3 in exit processing 2b.

The exit program 3 performs a process of setting in the parameter list 4 the start and end addresses of unnecessary ranges that do not need to be acquired because they are write-protected among the areas of the program used in the online processing 1.

When the exit program 3 finishes specifying the unnecessary range, the exit process 2b ends, and the dump acquisition range determining process 2c is executed.

In the dump acquisition range determination process 2c, the unnecessary range determined in process 2b is subtracted from the acquisition range determined in process 2a to determine the dump acquisition range.

Then, according to this dump acquisition range, the dump is output to the dump file 5 in the dump acquisition process 2d.

FIG. 2 shows a conventional dump acquisition method. In the conventional method, when the online processing (201) terminates abnormally and control is passed to the dump acquisition program (202), the dump acquisition program (202) immediately executes the dump acquisition range determination process (202a) based on the O8 parameter specification. The acquisition process (202b) was performed and the data was acquired in the dump file (203).

Figure 3 shows an image of dump reduction. As can be seen from FIG. 2, in the conventional dump acquisition method, as shown in the conventional dump acquisition range (301), all areas where the parameter of ○S is specified are included.

On the other hand, if the method of excluding the dump unnecessary range as shown in FIG. 1 is used, the dump acquisition range (302) excluding the unnecessary range (304) specified in the parameter list (303) is obtained.

In the manner described above, the amount of dumps obtained when online abnormal termination can be reduced.

〔Effect of the invention〕

According to the present invention, since it is possible to programmatically specify the range of areas that do not need to be acquired at the time of online abnormal termination, it is possible to flexibly reduce the amount of dump acquisition.

As a result, the amount of dumps to be acquired can be reduced, so that the dump acquisition time can be shortened, and the file size for outputting dumps can also be reduced.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an implementation method of the present invention, FIG. 2 is a diagram showing a conventional dump acquisition method, and FIG. 3 is a diagram showing an image of an unnecessary dump range. 2... A control program that acquires a dump when online ends abnormally, etc. 3... An exit program that specifies a range that does not need to be acquired among the areas managed by online. 4. Parameter list for informing the dump acquisition program from the exit program of the range where dump acquisition is unnecessary. T5 l diagram

Claims (1)

[Claims] 1. In the dump acquisition method of the online system, an exit program that specifies the area where dump acquisition is not required for the program that acquires the dump can be registered for each online system, and the area used by the online system can be saved. A method for reducing the amount of dumps to be obtained, characterized in that the amount of dumps to be obtained is reduced by not obtaining a dump in an area specified by an exit program.