CSMON service
The CSMON service displays information about common storage and the address space to which its ownership is attributed.
You can use short-term monitoring to diagnose sudden increases in common storage allocations, or to monitor one or more address spaces that might be overusing common storage.
You can use long-term monitoring to diagnose slowly increasing allocations of common storage, or to determine whether specific address spaces are allocating excessive amounts of common storage. For more information about common storage, commands, and data extraction and analysis, see Monitoring common storage usage.
Syntax
The parameters are defined as follows:
Parameter | Description |
|---|---|
SUMMARY (or SUM) | (Default) Summarizes CSA and SQA allocations, both above and below the 16-MB line, by address space You can use one of the following parameters with SUMMARY:
|
STATUS | Displays the status of the IBM Virtual Storage Management (VSM) data |
MAP asi | Lists the common storage blocks attributed to a specific address space The asi value, which is required after the MAP parameter, specifies the subject address space instance. For more information, see Identifying-address-spaces. |
Example 1
If the size of the common storage area is greater than 1,000,000 KB, the value in the LENGTH field is scaled.
To list the common storage blocks allocated by JES2, enter CSMON,MAP JES2:
Example 2
To list the common storage blocks allocated by ASID 29, enter enter CSMON,MAP (29):
Example 3
To display the status of VSM data collection, enter CSMON STATUS:
AMT001A SYSPROG
Example 4
To display the 10 address spaces that use the most SQA, enter CSMON SUMMARY SQA 10: