2. PERFORMANCE REPORTING ANALYSIS › 2.7 Graphic Analysis › 2.7.2 Storage Graphs › 2.7.2.1 System Storage Map

2.7.2.1 System Storage Map

GRAPHIC RESULTS

This graphic analysis provides a vertical bar chart of
storage frame use by the major system areas and the private
area.

ANALYSIS GUIDELINES

This graph maps total storage frames allocated by MVS system
areas.  This chart shows the storage frames allocated to the
Nucleus, CSA, LPA, SQA, LSQA, Private, and Available frames.
The sum of these fields represents the total number of
central storage frames.  When this resource becomes
constrained, MVS will respond with increased paging and
increased swapping to auxiliary storage.

Frame allocation is a type of resource usage that can be
analyzed effectively from a variety of perspectives.  Long
range charts done using the CA MICS MONTHS timespan can
permit you to track trends in frame usage.  More detailed
charts done using the DAYS timespan can help you analyze
peak period loads to determine if frame contention might be a
factor in any performance degradation.

You can analyze memory use further using the Real Storage
Management analysis reports described in Section 2.2. Virtual
storage allocation patterns can have an effect upon processor
storage usage.  These can be analyzed using the Virtual
Storage Management analysis reports found in Section 2.5.