PI98856: SHORT ON STORAGE SOS DUE TO SUBPOOL LDEPGM IN ESDSA PROGRAM COMPRESSION NOT HAPPENING

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• CICS SOS due to ESDSA subpool LDEPGM
  The Loader Domain ( LD ) shows:
  1677721K is the current maximum RPS target for the ESDSA
  233813K of ESDSA currently occupied by programs
  214931K of ESDSA occupied by programs with no current user(RPS)
  .
  The Maximum RPS (Redundant Program Storage) for the EDSA
  EDSALIM is 800M
  Maximum RPS shows as approximately 1.6 GB
  .
    Program compression is not being done to free the storage
  held by programs that aren't currently in use.
  .
    DFHLDNT calculation is initially set to 2G-1 (2147483648).
  It gets reduced on each call to DFHLDNT
  to notify it to free program storage.
  It will reduce it to 80% of what the previous value was.
  80% of 2G-1 is 1717986917, which is 1677721K
  (where K means 1024, not 1000).
  .
    The test for sma_notified_dsas_not_constrained
  is not done correctly. The next potential 14 times
  we could renotify DFHLDNT are skipped.
  So, program compression is not done on a timely basis.
  .
  Additional Symptom(s) Search Keyword(s): KIXREVxxx
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: CICS short on storage (SOS) due to      *
  *                      subpool LDEPGM in ESDSA program         *
  *                      compression not happening.              *
  *                                                              *
  ****************************************************************
  DFHSMSY should be resumed to clean up redundant program storage
  from loader domain 15 times but because of defective logic in
  DFHSMSY this is not happening. This results in the clean up not
  happening as quickly as it should, leading to an SOS situation
  not being cleaned up as quickly as possible.
  KEYWORDS: LDNT DFHSM0133 SM0133 0133 SM SMSY short-on-storage
            sma_notified_dsas_not_constrained
  

Problem conclusion

• DFHSMSY has been changed to correct the logic that tests the
  sma_notified_dsas_not_constrained flag.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UI57679 UI57680

Modules/Macros

• DFHSMSY
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R000 PSY UI57680

     UP18/08/04 P F808

• R100 PSY UI57679

     UP18/08/04 P F808

Fix is available

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