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PK70906: DB SPIKE AFTER CACHE CLEAR

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APAR status

  • Closed as program error.

Error description

  • defect 218453
    
    After pzn caches are cleared, load on the DB server spikes due
    to many simultaneous queries suddenly being run.
    

Local fix

Problem summary

  • When cached is cleared, multiple of the same queries are causing
    the database to spike.
    

Problem conclusion

  • Code change to only send one of each query to the DB and make
    duplicate queries wait for the initial query to load its items
    into cache to return.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PK70906

  • Reported component name

    WEBSPHERE PORTA

  • Reported component ID

    5724E7600

  • Reported release

    60G

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2008-08-21

  • Closed date

    2009-11-19

  • Last modified date

    2009-11-19

  • 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

    WEBSPHERE PORTA

  • Fixed component ID

    5724E7600

Applicable component levels

  • R60E PSY

       UP

  • R60G PSY

       UP

  • R60H PSY

       UP

  • R610 PSY

       UP

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Document Information

Modified date:
19 November 2009