OA37619: REDUCE CPU OVERHEAD FOR OMEGAMON II STORAGE LIGHT

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Reduce cpu overhead for Omegamon II Storage light when
  real storage thresholds are not set.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All OMEGAMON XE ON Z/OS users.               *
  ****************************************************************
  * PROBLEM DESCRIPTION: 1. High cpu usage in the Omegamon       *
  *                         Realtime Collector task when the     *
  *                         Omegamon II Storage light is         *
  *                         refreshed.                           *
  *                      2. High cpu usage in the Omegamon       *
  *                         Realtime Collector or TEMS tasks     *
  *                         when the XCSA or XECS exceptions are *
  *                         invoked.                             *
  *                      3. High cpu usage in the TEMS task in   *
  *                         csect KM3RSASM when the Real Storage *
  *                         workspace is invoked.                *
  ****************************************************************
  * RECOMMENDATION: Apply the PTF.                               *
  ****************************************************************
  1. In environments with a large amount of real storage, the
     code to report on real storage frames can use a lot of cpu.
     The code is run even when the thresholds for real storage
     use are not enabled.
  2. The XCSA and XECS exceptions scan through every block of
     CSA and ECSA storage which can be cpu intensive.
  3. The code to report on real storage is cpu intensive and
     executes every time the Real Storage workspace is invoked
     by a TEP user or situation.
  

Problem conclusion

• 1. Modify the code to only run the real storage analysis when
     the following Omegamon II real storage thresholds are set:
     Central storage online, Available frame queue low
  2. Modify the code to use CSA/Analyzer data if available
     instead of scanning common storage control blocks.
  3. Modify the code to only gather new data on real storage
     control blocks after 60 seconds have passed.  Multiple
     users and situations will receive the same data during that
     time interval.
  

Temporary fix

• *********
  * HIPER *
  *********
  UNTIL THIS PTF IS APPLIED, THE FOLLOWING ACTIONS CAN REDUCE CPU.
  IN OMEGAMON II, TURN OFF THE STORAGE LIGHT
  IN THE TEP, DISABLE OR INCREASE THE INTERVAL TIME FOR SITUATIONS
  THAT MONITOR COMMON STORAGE OR REAL STORAGE.
  

Comments

• ž**** PE11/11/29 FIX IN ERROR. SEE APAR OA38162  FOR DESCRIPTION
  

APAR Information

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

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

  OA37647 UA62871 UA62872

Modules/Macros

•    KM2001D  KM5AG1   KOMPWAI5 KOMWLM5  KOMXSY5
  

Fix information

• Fixed component name

  OMEG XE ON Z/OS

• Fixed component ID

  5698A5900

Applicable component levels

• R410 PSY UA62871

     UP11/11/02 P F111

• R420 PSY UA62872

     UP11/11/01 P F110

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.