PH11274: INCREASED CPU USAGE AFTER MIGRATING TO QM 3.3

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Increased CPU usage after migrating to QM 3.3.0 when running Db2
  Query Monitor data offload job, CQM@LDB2.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: IBM Db2 Query Monitor z/OS                   *
  *                 users of component                           *
  *                 - CQM ISPF                                   *
  *                 - Monitoring Profiles                        *
  *                 - Summaries                                  *
  *                 - OFFLOAD                                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: 1. Incorrect processing of filters with *
  *                      more than one asterisk caused increase  *
  *                      of collected data in CQM v3.3 comparing *
  *                      with CQM v3.2.                          *
  *                      2. Increased CPU usage after migrating  *
  *                      to Query Monitor v3.3.0 when running    *
  *                      Db2 Query Monitor data offload job,     *
  *                      CQM@LDB2.                               *
  ****************************************************************
  * RECOMMENDATION: APPLY the PTF.                               *
  ****************************************************************
  1. Incorrect change of logic for processing filters with more
  than one asterisk caused skip such filters during data
  processing.
  2. During investigation of the structures of the dataset
  interval and the DB2 tables, we determined that the performance
  of unloading data from the datasets of intervals (VSAM) files,
  for loading into a DB2 utility, due to the fact that CQM V3.3
  has more of fields in the file intervals in the DB2 tables and
  fields have a greater length than CQM V3.2.
  

Problem conclusion

• 1. The logic was corrected to process such filters in the same
  way as in CQM v3.2.
  2. The algorithm of offload process was corrected.
  
  Search Keywords:
  FILTER ASTERISK OFFLOAD CQM@LDB2
  

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:

Modules/Macros

• CQM#SVPA CQM#SVPX CQM@WDB2
  

Fix information

• Fixed component name

  DB2 QUERY MONIT

• Fixed component ID

  5655E6701

Applicable component levels

• R330 PSY UI64223

     UP19/07/18 P F907

Fix is available

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