To monitor common storage in a proactive fashion, CA SYSVIEW provides monitoring variable metrics at both the system level and the address space level.

Document ID : KB000037291
Last Modified Date : 14/02/2018
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Question:

How can I monitor common storage in a proactive fashion at both the system level and the address space level.

 

Answer:

These thresholds are defined in the MVSTHRSH member of the parmlib data set. The VARS display has a complete list of MVS monitoring variables. The following table provides a subset that pertains to common storage. Thresholds for several of these variables are defined in the default member, so it can be referenced for examples.

System-level thresholdsDescription
STGCSACSA storage allocated
STGCSA%CSA storage allocated pct
STGCSACCSA storage converted to SQA
STGCSAFCSA storage free
STGCSAMCSA storage max free block
STGCSASCSA storage size
STGECSAE-CSA storage allocated
STGECSA%E-CSA storage allocated pct
STGECSACE-CSA storage converted to E-SQA
STGECSAFE-CSA storage free
STGECSAME-CSA storage max free block
STGECSASE-CSA storage size
STGSQASQA storage allocated
STGSQA%SQA storage allocated pct
STGSQAFSQA storage free
STGSQASSQA storage size
STGESQAE-SQA storage allocated
STGESQA%E-SQA storage allocated pct
STGESQAFE-SQA storage free
STGESQASE-SQA storage size
Address space-level thresholdsDescription
JOBCSACSA storage allocated
JOBECSAE-CSA storage allocated
JOBSQASQA storage allocated
JOBESQAE-SQA storage allocated

 

There are also online displays that show common storage usage statistics and ownership.

COMMON

The COMMON command displays both summary and detailed information about common storage from a system-level perspective. The top portion of the display contains summary statistics for SQA, CSA, E-SQA, and E-CSA. The bottom portion of the display shows the same numbers broken down by subpool and storage key. Line commands are available that list the individual pieces of storage that make up the totals.

VSMTRACK

The VSMTRACK command also displays summary and detailed information about common storage, but from an address space-level perspective. The top portion of this display contains system-level summary stats similar to the COMMON command, but the bottom portion of the display identifies the jobs that have allocated this storage.

Issuing VSMTRACK SUMMARY displays one row per job showing the total amount of common storage it has allocated. You may also notice that some Jobnames are highlighted; this is because they ended but the storage is still allocated, which could indicate an orphaned storage condition.

A row can then be selected to provide a detail display of the individual pieces of storage that make up the totals for that job.

By defining thresholds to proactively monitor common storage usage, and using the COMMON and VSMTRACK commands to investigate any alerts, an IPL may be avoided due to running out of common storage.

Additional Information:

Product Documentation Wiki, CA SYSVIEW® Performance Management - 14.0
https://docops.ca.com/display/CSPM14/CA+SYSVIEW+Performance+Management