PI68534: Add support for and default to NO_COPY near cache CopyMode for the eXtreme Scale Dynacache provider.

APAR status

• Closed as program error.

Error description

• Performance is insufficient when doing a Dynacache get
  operation for a value that is stored locally in the near cache.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  IBM WebSphere eXtreme Scale users of        *
  *                  Dynacache who enable near cache.            *
  ****************************************************************
  * PROBLEM DESCRIPTION: Unnecessary decompression and           *
  *                      de-serialization are done               *
  *                      when accessing values on a near         *
  *                      cache hit.                              *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The eXtreme Scale Dynacache logic was updated to default to
  NO_COPY near cache CopyMode to circumvent compression and
  de-serialization.
  

Problem conclusion

• An interim fix is available for this APAR upon request.
  

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:

Fix information

• Fixed component name

  WS EXTREME SCAL

• Fixed component ID

  5724X6702

Applicable component levels

• R860 PSY

     UP

• R861 PSY

     UP