PK26805: PERFORMANCE CHANGES : IMPLEMENTATION OF CHECK FOR MAXSENDSIZE PRESENTLY TOO COSTLY.

6.1.0.7: WebSphere Application Server V6.1 Fix Pack 7 for Solaris
6.1.0.7: WebSphere Application Server V6.1 Fix Pack 7 for HP-UX
6.1.0.7: WebSphere Application Server V6.1 Fix Pack 7 for Linux
6.1.0.5: WebSphere Application Server V6.1.0 Fix Pack 5 for Linux
6.1.0.3: WebSphere Application Server V6.1.0 Fix Pack 3 for Linux
6.1.0.7: WebSphere Application Server V6.1 Fix Pack 7 for Windows
6.1.0.3: WebSphere Application Server V6.1.0 Fix Pack 3 for Windows
6.1.0.7 WebSphere Application Server V6.1 Fix Pack 7 for AIX
6.1.0.5: WebSphere Application Server V6.1.0 Fix Pack 5 for AIX
6.1.0.5: WebSphere Application Server V6.1.0 Fix Pack 5 for i5/OS
6.1.0.7: WebSphere Application Server V6.1 Fix Pack 7 for i5/OS
6.1.0.3: WebSphere Application Server V6.1.0 Fix Pack 3 for HP-UX
6.1.0.5: WebSphere Application Server V6.1.0 Fix Pack 5 for HP-UX
6.1.0.3: WebSphere Application Server V6.1.0 Fix Pack 3 for i5/OS
6.1.0.3: WebSphere Application Server V6.1.0 Fix Pack 3 for AIX
6.1.0.5: WebSphere Application Server V6.1.0 Fix Pack 5 for Windows
Java SDK 1.5 SR8 Cumulative Fix for WebSphere Application Server
Java SDK 1.5 SR8 Cumulative Fix for WebSphere Application Server
Java SDK 1.5 SR10 Cumulative Fix for WebSphere Application Server
6.1.0.31: Java SDK 1.5 SR11 FP1 Cumulative Fix for WebSphere Application Server
6.1.0.33: Java SDK 1.5 SR12 FP1 Cumulative Fix for WebSphere
6.1.0.29: Java SDK 1.5 SR11 Cumulative Fix for WebSphere Application Server
6.1.0.35: Java SDK 1.5 SR12 FP2 Cumulative Fix for WebSphere
6.1.0.37: Java SDK 1.5 SR12 FP3 Cumulative Fix for WebSphere
6.1.0.39: Java SDK 1.5 SR12 FP4 Cumulative Fix for WebSphere Application Server
6.1.0.41: Java SDK 1.5 SR12 FP5 Cumulative Fix for WebSphere Application Server
6.1.0.43: Java SDK 1.5 SR13 Cumulative Fix for WebSphere Application Server
6.1.0.45: Java SDK 1.5 SR14 Cumulative Fix for WebSphere Application Server
6.1.0.47: WebSphere Application Server V6.1 Fix Pack 47
6.1.0.47: Java SDK 1.5 SR16 Cumulative Fix for WebSphere Application Server
6.1.0.3: WebSphere Application Server V6.1.0 Fix Pack 3 for Solaris
6.1.0.5: WebSphere Application Server V6.1.0 Fix Pack 5 for Solaris
6.1.0.9: WebSphere Application Server V6.1 Fix Pack 9 for Solaris

APAR status

• Closed as program error.

Error description

• LocalActivityContext.marshalActivityIdentity and
  demarshalActivityIdentity make use of maxSendSize and
  maxReceiveSize specified by the propertyGroupinfo to impose a
  limit on the incoming/outbound serialized context.
  However, the current check implemented makes use of a
  temporary output stream to get a byte array and
  throws the serialized content away. The code needs to be
  optimized to either postpone the check till the final
  serialized content is available or reuse the byte array
  created in the check in the final content.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All WebSphere Application Server version     *
  *                 6.0.2 users of Activity Service.             *
  ****************************************************************
  * PROBLEM DESCRIPTION: The policing of maximum send and        *
  *                      receive size is not optimized.          *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When a propertyGroupinfo is defined such that a limit is
  imposed on the incoming/outgoing serialized context, the
  current check makes use of a temporary output stream to get a
  byte array and throws the serialized content away, only for
  the serializtion to be done again. This is inefficient, and
  can cause a performance overhead on a system handling large
  numbers of activity service contexts.
  

Problem conclusion

• The Activity Service code will be changed to optimize the
  policing check.
  The fix for this APAR is currently targeted for inclusion in
  fixpacks 6.0.2.13 and 6.1.0.3. Please refer to the recommended
  updates page for delivery information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

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

• TRANS
  

Fix information

• Fixed component name

  WEBSPH APP SERV

• Fixed component ID

  5724J0800

Applicable component levels

• R60A PSY

     UP

• R60H PSY

     UP

• R60I PSY

     UP

• R60P PSY

     UP

• R60S PSY

     UP

• R60W PSY

     UP

• R60Z PSY

     UP

• R61A PSN

     UP

• R61H PSN

     UP

• R61I PSN

     UP

• R61P PSN

     UP

• R61S PSN

     UP

• R61W PSN

     UP

• R61Z PSN

     UP