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PI83215: READING LARGE FILES IN DYNAMIC VIEWS MUCH SLOWEER AFTER UPDATINGFROM SUSE LINUX 11 TO SUSE LINUX 12.

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APAR status

  • Closed as program error.

Error description

  • Reading large files (> 4KB) in IBM Rational ClearCase dynamic
    views is significantly slower on a SuSE 12 SP2 host than it is
    on a SuSE 11 SP3 host. Depending on the size of the files
    involved, a 3-10x performance difference has been observed.
    
    The most common place to observe the impact is dramatically
    increased build times when comparing SuSE 11 build hosts with
    SuSE 12 build hosts. Creating final executable object files
    requires reading executables, libraries, and intermediate object
    files that are usually located in the dynamic view.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Users of ClearCase dynamic views on SuSE 12.                 *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * Reading ClearCase view private files larger than 4 KB may be *
    * noticeably slower on SuSE 12 than on previous versions.      *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    

Problem conclusion

  • This problem was fixed in ClearCase versions 8.0.1.15, 9.0.0.5,
    and 9.0.1.1.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI83215

  • Reported component name

    CLRCASE MSITE W

  • Reported component ID

    5724G3200

  • Reported release

    900

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-06-16

  • Closed date

    2017-09-13

  • Last modified date

    2017-09-13

  • 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

    CLRCASE MSITE W

  • Fixed component ID

    5724G3200

Applicable component levels

  • R801 PSY

       UP

  • R900 PSY

       UP

  • R901 PSY

       UP

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Document Information

Modified date:
13 September 2017