PK57777: HIGH CPU. LOOP IN DGOMEXA0. FPEV0158W AND FPEV0162W.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• High CPU. The systrace shows a loop condition within DGOMEXA0.
  FPEV0158W  XXXX xx:xx:xx.xx DATA SERVER DETECTED HIGH CPU USAGE
  (xx%) OF TASK DGOMEXA0
  and
  FPEV0162W  XXXX xx:xx:xx.xx TRACES ARE STARTED FOR FURTHER
  ANALYSIS OF HIGH CPU USAGE
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: OMEGAMON XE for DB2 PE/DB2PM                 *
  *                 users of component:                          *
  *                 -   PE Server                                *
  ****************************************************************
  * PROBLEM DESCRIPTION: When the OMEGAMON Server subtask        *
  *                      PESERVER is started with automatic      *
  *                      exception processing enabled or when    *
  *                      periodic exception processing is        *
  *                      started after PESERVER is up and        *
  *                      running and threshold values are set    *
  *                      for thread data and the amount of       *
  *                      monitored threads exceeds the internal  *
  *                      capacity, the periodic exception module *
  *                      DGOMEXA0 might enter a loop and cause   *
  *                      high CPU consumption.                   *
  *                      The high CPU consumption is detected by *
  *                      PESERVER which issues message           *
  *                      FPEV0158W, starts the internal server   *
  *                      traces and will finally reattach the    *
  *                      periodic exception subtask if the high  *
  *                      CPU consumption persists.               *
  *                                                              *
  *                                                              *
  *                      for V310                                *
  *                      The service level of the                *
  *                      OMEGAMON server subtask PESERVER        *
  *                      FPEV0000I  DATA SERVER INITIALIZATION   *
  *                      FPEV0114I  PTF BUILD IS 07.346          *
  *                                                              *
  *                      for V410                                *
  *                      The service level of the                *
  *                      OMEGAMON server subtask PESERVER        *
  *                      FPEV0000I  DATA SERVER INITIALIZATION   *
  *                      FPEV0114I  PTF BUILD IS 07.346          *
  *                                                              *
  ****************************************************************
  * RECOMMENDATION: Apply this PTF.                              *
  ****************************************************************
  PROBLEM SUMMARY:
  When the OMEGAMON Server subtask PESERVER is started with
  automatic exception processing enabled or when periodic
  exception processing is started after PESERVER is up and
  running and threshold values are set for thread data and the
  amount of monitored threads exceeds the internal capacity,
  a buffer overflow can occur in the periodic exception module
  DGOMEXA0. Processing of the buffer might enter a loop and cause
  high CPU consumption.
  The high CPU consumption is detected by PESERVER which issues
  message FPEV0158W, starts the internal server traces and will
  finally issue an SDUMP for analysis purposes and reattach the
  periodic exception subtask if the high CPU consumption persists.
  
  PROBLEM CONCLUSION:
  Periodic Exception Processing has been corrected to prevent a
  buffer overflow and entering an infinite loop.
  

Problem conclusion

• Periodic Exception Processing has been corrected to prevent a
  buffer overflow and entering an infinite loop.
  
  KEYWORDS :
  HIGH CPU DGOMEXA0 FPEV0158W FPEV0162W SDUMP
  

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:

  UK32218 UK32219

Modules/Macros

•    DGOMEXA0 DGOMTADJ DGOVMSTR DGOVSADJ DGOVSAGG
  DGOVSBAG
  

Fix information

• Fixed component name

  OM XE DB2PE/PM

• Fixed component ID

  5655OPE00

Applicable component levels

• R310 PSY UK32218

     UP07/12/14 P F712

• R410 PSY UK32219

     UP07/12/14 P F712

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.