IBM Support

IC97254: AUTO READAHEAD ON HDR SECONDARIES OR RSS NODES CAN ALLOCATE TOO MUCH MEMORY IN THE RA_POOL

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APAR status

  • Closed as program error.

Error description

  • A new component of auto readahead introduced in 11.70.xC3 allows
    the readahead thread to read logical log pages during fast
    recovery. If the readahead thread falls behind, the readahead
    request list can grow unbounded and consume large amounts of
    memory. This new functionality does not honor the onconfig
    parameter AUTO_READAHEAD's readahead_cnt value or its default
    limit of 128 pages.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * only for HDR secondary users                                 *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Update to IDS-11.70.xC8                                      *
    ****************************************************************
    

Problem conclusion

  • Problem Fixed In IDS-11.70.xC8
    

Temporary fix

Comments

APAR Information

  • APAR number

    IC97254

  • Reported component name

    INFORMIX SERVER

  • Reported component ID

    5725A3900

  • Reported release

    B70

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-10-28

  • Closed date

    2014-02-26

  • Last modified date

    2014-02-26

  • 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

  • RA10 PSN

       UP

  • RA10 PSY

       UP

  • RB10 PSN

       UP

  • RB10 PSY

       UP

  • RB50 PSN

       UP

  • RB50 PSY

       UP

  • RB70 PSN

       UP

  • RB70 PSY

       UP

  • RC10 PSN

       UP

  • RC10 PSY

       UP

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Document Information

Modified date:
26 February 2014