PI12410: Reduce memory overhead for each cache entry and strings that are stored in the cache.

APAR status

• Closed as program error.

Error description

• Memory usage in cache seems excessive.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of WebSphere eXtreme Scale        *
  ****************************************************************
  * PROBLEM DESCRIPTION: Cache entries might have extraneous     *
  *                      data, which increases overhead.         *
  *                      String-based keys can also consume      *
  *                      space in the cache.                     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The code was corrected to reduce the size of the cache entry
  overhead. Code was also corrected to make sure the size of
  String objects in the cache is minimized by shrinking the byte
  array to the length of the String.
  The size savings are dependent on the Java Development Kit
  (JDK) that you use.
  

Problem conclusion

• An interim fix is available for this problem.
  

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

• R850 PSY

     UP

• R860 PSY

     UP