PH59165: ENABLE HEAPPOOLS ON NEW IHS INSTANCES

APAR status

• Closed as program error.

Error description

• IHS should enable HEAPPOOLS/HEAPPOOLS64 LE option by default in
  new instances. It is especially useful in multi-threaded System
  SSL usage.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM HTTP Server on z/OS        *
  ****************************************************************
  * PROBLEM DESCRIPTION: IHS may have very poor performance with *
  *                      SSL enabled when ICSF is using software *
  *                      emulation instead of CPACF              *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  ICSF without CPACF makes frequent heap allocations. When being
  driven by multi-threaded IHS, it can result in latch contention
  and poor performance (high CPU, handshake delays).
  

Problem conclusion

• New instances of IHS will have the following in bin/envvars:
  ```
  # PH59165 enable HEAPPOOLS/HEAPPOOLS64 in new instances
  export _CEE_RUNOPTS="$_CEE_RUNOPTS HEAPPOOLS(ON) HP64(ON)"
  ```
  
  No change is applied to existing instances.
  
  The fix for this APAR is targeted for inclusion in IBM HTTP
  Server fix packs 8.5.5.26 and 9.0.5.19. For more information,
  see 'Recommended Updates for WebSphere Application Server':
  https://www.ibm.com/support/pages/node/715553
  

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

  WAS IHS ZOS

• Fixed component ID

  5655I3510

Applicable component levels