PK80283: SNAPSHOT HISTORY GOT STORAGE SHORTAGE DUE TO NTH & KO2DMGRB BY ALLOCATING 4GB BUFFER IN LOWER PRIVATE: NO EXTENDED PRIVATE LEFT

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Snapshot History suffered from the storage shortage caused by
  NTH and KO2DMGRB.
  However, one identified problem is, that Snapshot History
  allocated a 4 MB buffer in lower private because storage in
  extended private was exhausted. Snapshot History must never
  allocate its buffers in lower private.
  .
  160 MB allocated by DGOVMSTR
  -> 14 DB2 Subsystems are monitored with Snapshot History
  enabled.
  .
  Each instance of Snapshot History allocates 4MB for the mapping
  of the VSAM data set and 4MB as buffer for performance data
  retrieved from DB2. At least 1 MB is allocated for the VSAM data
  set.
  .
  This explains the majority of the memory allocation.
  -> 4 MB are allocated in lower private (address 00449000'x) by
  Snapshot History.  This is a defect.
  Errors seen in OMPE Server joblog:
  .
  11.35.37 STC02016  FPEV0003S  DBQ2 GETMAIN 19 FAILED. SIZE
                                                     4194304, RC 4
  

Local fix

• This issue occurred as a result of the issue reported and
  fixed by PK80459/UK44097. This issue is not expected to reoccur
  if the PTF has been applied.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: OMEGAMON XE for DB2 PE/DB2PM                 *
  *                 users of component                           *
  *                 - OMEGAMON collector                         *
  *                 - PE Server subtask                          *
  ****************************************************************
  * PROBLEM DESCRIPTION: Snapshot History suffered from the      *
  *                      storage shortage caused by NTH and      *
  *                      KO2DMGRB. This fact forces the Snapshot *
  *                      History to allocate a 4 MB buffer in    *
  *                      lower private because storage in        *
  *                      extended private was exhausted.         *
  *                      Snapshot History must never allocate    *
  *                      its buffers in lower private.           *
  *                                                              *
  *                      Symptoms:                               *
  *                      ABENDs S878, S0C4, S0C1                 *
  *                      accompanied by the message              *
  *                      FPEV0003S ... GETMAIN 19 FAILED.        *
  *                      SIZE 4194304, RC 4                      *
  ****************************************************************
  * RECOMMENDATION: Apply this PTF                               *
  ****************************************************************
  PROBLEM SUMMARY:
  Snapshot History suffered from the storage shortage caused
  by NTH and KO2DMGRB when OMEGAMON collector is monitoring
  more than 12 DB2 subsystems
  
  PROBLEM CONCLUSION:
  The code is reviewed and modified so as to prevent allocation
  of internal buffers having their size of 4MB or larger in the
  private area below the 16M line.
  
  KEYWORDS: ABEND S878 S0C4 S0C1 FPEV0003S GETMAIN 19 FAILED
  

Problem conclusion

• The code is reviewed and modified so as to prevent allocation
  of internal buffers having their size of 4MB or larger in the
  private area below the 16M line.
  
  KEYWORDS: ABEND S878 S0C4 S0C1 FPEV0003S GETMAIN 19 FAILED
  

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:

  UK47671

Modules/Macros

• DGOVCINI DGOVDB2C DGOVDIVU DGOVDS   DGOVHMDR
  DGOVHMTC DGOVHM00 DGOVISI  DGOVMB   DGOVMSTR DGOVPMOV DGOVSDOC
  DGOZMB
  

Fix information

• Fixed component name

  OM XE DB2PE/PM

• Fixed component ID

  5655OPE00

Applicable component levels

• R410 PSY UK47671

     UP09/07/07 P F907

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.