IC64922: POTENTIAL MEMORY ALLOCATION ISSUE WITH LONG RUNNING GENERATE BACKUPSET COMMAND

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • During a long running GENERATE BACKUPSET command (for instance
    if the node has multiple terabytes of data stored), the memory
    consumption of the Tivoli Storage Manager 6.1 server process can
    grow such high, that - dependent on the overall memory available
    on the system - in worst case the complete system gets
    unresponsive.
    The Tivoli Storage Manager server is allocating memory that is
    transaction based and since this particular transaction is kept
    open for the entire GENERATE BACKUPSET process the memory
    continually grows. The amount of memory that is allocated is
    dependent on how many data segments have to be opened to
    generate the backupset. This is obviously exacerbated when the
    objects being generated for the backupset reside in a
    deduplicated storage pool and the node being processed has a lot
    of storage tied to it.
    .
    Customer/L2 Diagnostics:
    To verify you are affected by this APAR you can look at the
    output of the following undocumented service command (issued
    multiple times, for instance each 5 minutes):
    SHOW MEMORY
    .
    If this APAR applies, you will see over time an increasing
    amount/entries memory allocated by asrtrv.c, for instance:
    93532 entries, using   26188960 bytes, from asrtrv.c(2098)
    170027 entries, using   47607560 bytes, from asrtrv.c(2098)
    [...]
    7599267 entries, using 2127794760 bytes, from asrtrv.c(2098)
    7643786 entries, using 2140260080 bytes, from asrtrv.c(2098)
    .
    .
    Tivoli Storage Manager Versions Affected:
    Tivoli Storage Manager 6.1 servers on all supported platforms.
    .
    .
    Initial Impact:
    High
    .
    .
    Additional Keywords:
    zz61 TSM leak mem memory comsum loop hang slow
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All Tivoli Storage Manager server users.     *
    ****************************************************************
    * PROBLEM DESCRIPTION: See ERROR DESCRIPTION.                  *
    ****************************************************************
    * RECOMMENDATION: Apply fixing level when available. This      *
    *                 problem is currently projected to be fixed   *
    *                 in level 6.1.3.2 and 6.1.4.                  *
    *                 Note that this is subject to change at the   *
    *                 discretion of IBM.                           *
    ****************************************************************
    See ERROR DESCRIPTION.
    

Problem conclusion

  • The described problem has been resolved.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IC64922

  • Reported component name

    TSM SERVER

  • Reported component ID

    5698ISMSV

  • Reported release

    61W

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2009-12-03

  • Closed date

    2010-01-28

  • Last modified date

    2010-01-28

  • 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

    TSM SERVER

  • Fixed component ID

    5698ISMSV

Applicable component levels

  • R61A PSY

       UP

  • R61H PSY

       UP

  • R61L PSY

       UP

  • R61S PSY

       UP

  • R61W PSY

       UP



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Document information


More support for:

Tivoli Storage Manager

Software version:

61W

Reference #:

IC64922

Modified date:

2010-01-28

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