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PH03537: CLEARCASE DATABASE PERFORMANCE ON WINDOWS IS DISPROPORTIONATELY IMPACTED BY LOCK CONTENTION ON VISTA FILES.

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Under high transaction loads, Windows ClearCase servers are
    disproportionately impacted by file lock contention on vista.*
    files. The underlying cause is that the OS file lock API used by
    the database core has a fixed one-second retry interval. As
    such, any contended locks will introduce an immediate one-second
    delay in the operations in question.
    
    This issue is more prevalent when the VOB storage is on a
    Network Attached Storage device.
    
    Moving the retry logic into the application, where the retry
    intervals can be tuned resolves this issue.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Users of Windows ClearCase servers.                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * Under high transaction loads, Windows ClearCase servers are  *
    * disproportionately impacted by file lock contention on       *
    * vista.* files. The underlying cause is that the OS file lock *
    * API used by the database core has a fixed one-second retry   *
    * interval. As such, any contended locks will introduce an     *
    * immediate one-second delay in the operations in question.    *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    

Problem conclusion

  • A fix is available in ClearCase version 9.0.1.6
    

Temporary fix

Comments

APAR Information

  • APAR number

    PH03537

  • Reported component name

    CLEARCASE WIN

  • Reported component ID

    5724G2900

  • Reported release

    901

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-10-02

  • Closed date

    2019-03-22

  • Last modified date

    2019-03-22

  • 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

    CLEARCASE WIN

  • Fixed component ID

    5724G2900

Applicable component levels

  • R901 PSY

       UP

[{"Line of Business":{"code":"LOB10","label":"Data and AI"},"Business Unit":{"code":"BU029","label":"Software"},"Product":{"code":"SSSH27","label":"Rational ClearCase"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"901"}]

Document Information

Modified date:
16 June 2021