PM33598: WLM SIBUS ME STARTUP AND SHUTDOWN PERFORMANCE ENHANCEMENT

7.0.0.17: Java SDK 1.6 SR9 FP1 Cumulative Fix for WebSphere Application Server
6.1.0.47: WebSphere Application Server V6.1 Fix Pack 47
7.0.0.27: Java SDK 1.6 SR13 FP2 Cumulative Fix for WebSphere Application Server
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: Java SDK 1.5 SR16 Cumulative Fix for WebSphere Application Server
7.0.0.19: Java SDK 1.6 SR9 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.21: Java SDK 1.6 SR9 FP2 Cumulative Fix for WebSphere
7.0.0.23: Java SDK 1.6 SR10 FP1 Cumulative Fix for WebSphere
7.0.0.25: Java SDK 1.6 SR11 Cumulative Fix for WebSphere Application Server
7.0.0.27: Java SDK 1.6 SR12 Cumulative Fix for WebSphere Application Server
7.0.0.29: Java SDK 1.6 SR13 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.45: Java SDK 1.6 SR16 FP60 Cumulative Fix for WebSphere Application Server
7.0.0.31: Java SDK 1.6 SR15 Cumulative Fix for WebSphere Application Server
7.0.0.35: Java SDK 1.6 SR16 FP1 Cumulative Fix for WebSphere Application Server
7.0.0.37: Java SDK 1.6 SR16 FP3 Cumulative Fix for WebSphere Application Server
7.0.0.39: Java SDK 1.6 SR16 FP7 Cumulative Fix for WebSphere Application Server
7.0.0.41: Java SDK 1.6 SR16 FP20 Cumulative Fix for WebSphere Application Server
7.0.0.43: Java SDK 1.6 SR16 FP41 Cumulative Fix for WebSphere Application Server

APAR status

• Closed as program error.

Error description

• Workload Management SIBus Messaging Engine startup and shutdown
  performance enhancement
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  Users of IBM WebSphere Process Server or    *
  *                  users of IBM WebSphere Application Server   *
  *                  with many SCA Modules or a SIBus topology   *
  *                  with a Messaging Engine (ME) containing     *
  *                  many destinations                           *
  ****************************************************************
  * PROBLEM DESCRIPTION: Workload Management (WLM) SIBus         *
  *                      Messaging Engine startup and shutdown   *
  *                      performance enhancement                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Users of WebSphere Process Server with many Service Component
  Architecture (SCA) Modules or users of a SIBus topology with
  a Messaging Engine containing thousands of destinations may
  find that their Messaging Engines take a long time to start up
  and shut down, and that as the number of destinations or SCA
  Modules, which implicitly create destinations, is increased,
  the startup time will grow in an exponential fashion.
  

Problem conclusion

• This APAR provides a scaling enhancement change within the
  WLM data  propagation mechanisms in these scenarios to reduce
  the algorithmic complexity from exponential down to linear
  as well as reducing the overall amount of data which needs to
  be propagated during an ME start or stop scenario.
  
  In order to enable and use either of the custom properties,
  you must take the following steps:
  
  In the administrative  console click on "System Administration"
  on the left side, click on "Cell" underneath that, then click
  on "Custom Properties" in the middle frame.
  
  You'll want to create a new custom property with the name:
  
  IBM_CLUSTER_ENABLE_CAR_DELAY_POSTING
  
  and a value of true.
  
  Note that this performance enhancement should be used in
  conjunction with a prior enhancement contained in the 6.1.0.23
  and 7.0.0.3 fixpacks which enabled in a similar fashion but with
  the custom property:
  
  IBM_CLUSTER_ENABLE_ACS_DELAY_POSTING
  
  With the combination of these two properties being enabled, it
  is possible to see a reduction in the time it takes a
  Messagine Engine failover event to occur (the stop of one ME
  and the start of another) of 95% or more depending on how
  many destinations are configured.
  
  The fix for this APAR is currently targeted for inclusion in
  fix packs 6.1.0.39 and 7.0.0.17  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:

Fix information

• Fixed component name

  WEBS APP SERV N

• Fixed component ID

  5724H8800

Applicable component levels

• R61A PSY

     UP

• R61H PSY

     UP

• R61I PSY

     UP

• R61P PSY

     UP

• R61S PSY

     UP

• R61W PSY

     UP

• R61Z PSY

     UP

• R700 PSY

     UP