IT27546: INCREASE IN IDS STARTUP TIME WHEN ALLOCATING LARGE BUFFER POOLS

APAR status

• Closed as program error.

Error description

• In IDS version 12.10 the timer required during startup is
  increased when large buffer pools are configured. The additional
  delay can be seen from messages in the online log. For example:
  
  04:10:34  Requested shared memory segment size rounded from
  223006976KB  to 223008768KB
  04:10:34  Shared memory segment will use huge pages.
  04:10:34  Segment locked: addr=0x3ce6800000, size=228360978432
  04:14:07  Successfully added a bufferpool of page size 16K.
  
  There is a delay of approximately 3.5 minutes between the last
  two messages. The length of this delay will depend on the amount
  of shared memory required for the buffer pool to be allocated.
  
  IDS version 11.70 does not require the same amount of time to
  create similarly sized buffer pools.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Users of IDS 12.10.xC11 and older versions.                  *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * Increase in IDS startup time when allocating large buffer    *
  * pools.                                                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  

Problem conclusion

• Fixed in IDS 12.10.xC12.
  

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

  INFORMIX SERVER

• Fixed component ID

  5725A3900

Applicable component levels