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PI45351: VOB SERVER MEMORY CONSUMED BY DB_SERVER PROCESSES

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • After reformatting UCM project VOBs to schema 80, but not
    advancing their Feature Level to 7 or 8,  the server may start
    building up a large number of db_server processes that consume a
    huge amount of memory.
    
    Example:
    ----------------------------------------------------
    08:02:53 Top 10 processes by RSS || /bin/prstat -n 10 -s rss -c
    1 1
    ----------------------------------------------------
       PID USERNAME  SIZE   RSS STATE  PRI NICE      TIME  CPU
    PROCESS/NLWP
      3793 root     3617M 3614M sleep   59    0   0:08:51 0.0%
    db_server/1
     25369 root     2679M 2678M sleep   59    0   0:05:48 0.0%
    db_server/1
      1669 root      989M  986M sleep   59    0   0:05:23 0.0%
    db_server/1
      3621 root      937M  934M sleep   59    0   0:04:36 0.0%
    db_server/1
      4033 root      921M  918M sleep   59    0   0:01:47 0.0%
    db_server/1
      3614 root      913M  910M sleep   59    0   0:01:25 0.0%
    db_server/1
      3017 root      909M  906M sleep   59    0   0:01:21 0.0%
    db_server/1
      3157 root      885M  882M sleep   59    0   0:01:23 0.0%
    db_server/1
     10485 root      879M  878M sleep   59    0   0:01:30 0.0%
    db_server/1
     10502 root      789M  786M cpu19   20    0   0:01:07 0.3%
    db_server/1
    Total: 132 processes, 1322 lwps, load averages: 0.92, 0.83, 0.88
    

Local fix

  • A restart of ClearCase server processes, and in some cases a
    reboot of the server, is required to releases the memory to
    other processes
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Users of IBM ClearCase.                                      *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * IBM ClearCase db_server processes accessing a Unified Change *
    * Management Process VOB (UCM PVOB) at schema 80 and feature   *
    * level 6 or lower may consume large amounts of memory on the  *
    * VOB server host                                              *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    

Problem conclusion

  • This issue has been fixed in ClearCase versions 8.0.0.16 and
    8.0.1.9
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI45351

  • Reported component name

    CC&CC MSITE WIN

  • Reported component ID

    5724G3300

  • Reported release

    801

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-07-21

  • Closed date

    2015-09-17

  • Last modified date

    2015-09-17

  • 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

    CC&CC MSITE WIN

  • Fixed component ID

    5724G3300

Applicable component levels

  • R800 PSY

       UP

  • R801 PSY

       UP



Document information

More support for: Rational ClearCase MultiSite

Software version: 801

Reference #: PI45351

Modified date: 17 September 2015