PI05296: DFHSM0131 CICS IS UNDER STRESS SHORT ON STORAGE BELOW 16MB SM0131 CDSA KESTK24E

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• DFHSM0131 CICS is under stress short on storage below 16MB
  due to an excess of CDSA storage for subpool KESTK24E
  .
  PAM storage blocks that show large numbers
  of ID x'0022' type storage currently active.
  All of them were filled with SEGENTRY type control blocks.
  .
  A  SEGENTRY holds Stack Entries for tasks in the KE domain.
  The SEGENTRY Reg14 point into module DFHETRX.
  .
  That module gets stack storage from Below The Line
  because SMODE (Stack Mode) is set to 24
  .
  DFHLFM TYPE=ENTER,
  SMODE=24,
  .
  It gets stack storage of x'02A0' bytes:
  .
  Going to the TASENTRY pointed to by the KE_TASK in the summary
  +x'1C' points to the current stack entry:
  +x'8C' points to the BTL     stack entry:
  .
  The last request was for a MONITOR command,
  which DFHETRX processes.  So, that matches up.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION: CICS goes short on storage below the    *
  *                      16MB line after many EXEC CICS ENTER    *
  *                      TRACENUM or EXEC CICS MONITOR POINT     *
  *                      commands.                               *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Module DFHETRX acquires its storage below the line and this is
  not released until task termination. Many EXEC CICS ENTER
  TRACENUM or EXEC CICS MONITOR POINT requests can cause
  msgDFHSM0131 to be produced and CICS to go SOS.
  

Problem conclusion

• DFHETRX has been changed so that it acquires its storage from
  above the line.
  

Temporary fix

• FIX AVAILABLE BY PTF ONLY
  

Comments

APAR Information

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

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

  PI05334 UI12533

Modules/Macros

•    DFHETRX
  

Fix information

• Fixed component name

  CICS TS Z/OS V4

• Fixed component ID

  5655S9700

Applicable component levels

• R700 PSY UI12533

     UP13/12/02 P F311

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.