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SOS

The Short on Storage (SOS) report set is useful when a CICSĀ® systems programmer sees a notification that one of the CICS regions is experiencing a Short on Storage (SOS) condition.

The condition might be a symptom of other resource constraints that cause CICS tasks to occupy storage for longer than is normally necessary, or a symptom of a large number of tasks that overwhelm the available free storage, or a symptom of badly-designed applications that require unreasonably large amounts of storage. The CICS systems programmer wants to know what reports to run to find the causes of the SOS condition. Based on these reports and analysis, the systems programmer can then consider tuning options as well as further analysis and monitoring.

The SOS report set produces the following reports:

Report Type Default DDNAME Description
Performance summary SUMM0002 SoS Shared Storage Analysis (V5)
Performance summary SUMM0003 SoS Storage Usage - Above the Bar
Performance summary SUMM0004 SoS Program Storage Analysis
Performance summary SUMM0006 SoS User (Task) Storage Analysis (V5)
Statistics summary SSUM0001 SoS Virtual Storage Usage Summary report
Statistics alerts STAL0001 SoS Alert report (List by APPLID and Summary by APPLID)

To produce the reports, SOS uses the following components:

Component name Component type Description
SSTG5SUM form Shared Storage Analysis (V5). Used by the SUMM0002 report.
STG64SUM form Storage Usage - Above the Bar. Used by the SUMM0003 report.
PSTORSUM form Program Storage Analysis. Used by the SUMM0004 report.
USTG5SUM form User (Task) Storage Analysis (V5). Used by the SUMM0006 report.
VIRTSTG form Virtual storage usage summary. Used by the SSUM0001 statistics summary report.
SOS alert CICS TS Key System Sample Alerts. Used by the STAL0001 statistics alert report.
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