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JR32568: IMPROVEMENT OF STACK SPACE UTILIZATION BY OPTIMIZER

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • This APAR is created  to improve the stack space  utilization by
    optimizer so that a large iterative operation could be performed
    with smaller size of the agent stack size
    
    The improvement might  reduce stack space need from 4Meg to
    2.75 - 3Meg  for certain large queries
    

Local fix

  • Increase the agent stack size to avoid stack overflow
    

Problem summary

  • Users Affected : Users using very large queries
    Problem Summary : Large queries uses large number of
    iterative operation which might hit agent stack limit
    Problem Solution : The fix of this APAR will reduce the need
    of stack space resulting less amount of stack size
    

Problem conclusion

  • This APAR is fixed in V9.5 FixPak5
    (CQ defect#wsdbu00400320)
    

Temporary fix

Comments

APAR Information

  • APAR number

    JR32568

  • Reported component name

    DB2 UDB ESE WIN

  • Reported component ID

    5765F4101

  • Reported release

    950

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2009-03-31

  • Closed date

    2009-12-30

  • Last modified date

    2009-12-30

  • APAR is sysrouted FROM one or more of the following:

    JR32567

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    DB2 UDB ESE WIN

  • Fixed component ID

    5765F4101

Applicable component levels

  • R950 PSY

       UP

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Document Information

Modified date:
30 December 2009