PK29100: CPU USAGE IN CLASSIC TASK INCREASEDWHEN AUTODETECT MECHANISM OF THE DATA SERVER MASTER (DGOVMSTR) USED TO SENSE DB2 SUBSYSTEM

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The autodetect mechanism of the data server master (DGOVMSTR) is
  used to sense DB2 subsystems in the LPAR,  we do a connect to
  DB2 to check whether it becomes alive or is still alive.
  For an example
   - 1. Assume the server is up and running
   - 2. Assume the server is searching for new DB2 subsystems
  every 3 secs
   - Now a new DB2 subsystem is started
  In case the server just did the autodetect we would again issue
  an identify in 3 secs  to detect the new DB2 subsystem and
  begins monitoring.  This is why there are so many identifies.
  .
  We will improve the identify function for autodetect.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: OMEGAMON XE for DB2 PE/DB2PM V310            *
  *                 users of component:                          *
  *                 -   OMEGAMON Server                          *
  ****************************************************************
  * PROBLEM DESCRIPTION: When AUTODETECTION of DB2 subsystems    *
  *                      is enabled for the DATA SERVER the      *
  *                      LPAR is scanned for active DB2          *
  *                      subsystems every 3 seconds. This        *
  *                      sample rate causes frequent module      *
  *                      LOADS and connects to the sensed DB2    *
  *                      subsystems which generates CPU USAGE,   *
  *                      DB2 activity and I/O ACTIVITY.          *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  

Problem conclusion

• The sample rate for autodetect will automatically decrease
  after start up of the data server from 3 seconds down to an
  ultimate sample interval of 3 minutes. When the ultimate
  sample rate is reached, new DB2 subsystems becoming active in
  the LPAR will no longer be detected instantaneously. Instead
  the detection may vary between immediately after start up of
  the DB2 subsystem and 3 minutes maximum. Detection of a
  stopping DB2 subsystem remains instantaneous.
  ------------------
  SYSMOD TITLE: AUTODETECT
  KEYWORDS:  AUTODETECT, DB2, LPAR
  

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:

  UK17136

Modules/Macros

•    DGOVMSTR
  

Fix information

• Fixed component name

  OM XE DB2PE/PM

• Fixed component ID

  5655OPE00

Applicable component levels

• R310 PSY UK17136

     UP06/08/15 P F608

Fix is available

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