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IC78937: BACKUP PERFORMANCE DEGRADATION UPGRADING TO 9.7 FP1+

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Backup Performance may degrade after applying 9.7 Fix Pack 1 or
    greater when executing the Backup command without explicitly
    specifying the Parallelism and Buffer Values and when letting
    DB2 automatically compute the values.
    
    Automatic values chosen by DB2 when no parallelism or buffer
    size is explicitly chosen is lower in FP1+ compared to GA.
    
    For example, In one case:
    Fix Pack "1" :
    
    Autonomic backup/restore - using parallelism = 12.
    
    Using buffer size = 3328, number = 24
    
    
    
    
    GA :
    
    Autonomic backup/restore - using parallelism = 2.
    
    Using buffer size = 4096, number = 4.
    

Local fix

  • Run the Backup command specifying explicit values for
    Parallelism and Buffer Size.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All DB2 Users                                                *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to DB2 Version 9.7 Fixpack 6 or later                *
    ****************************************************************
    

Problem conclusion

  • Problem has been fixed in DB2 Version 9.7 Fixpack 6
    

Temporary fix

Comments

APAR Information

  • APAR number

    IC78937

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    970

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2011-09-27

  • Closed date

    2012-06-27

  • Last modified date

    2012-06-27

  • APAR is sysrouted FROM one or more of the following:

    IC73341

  • APAR is sysrouted TO one or more of the following:

    IC84271

Fix information

  • Fixed component name

    DB2 FOR LUW

  • Fixed component ID

    DB2FORLUW

Applicable component levels

  • R970 PSN

       UP

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSEPGG","label":"DB2 for Linux, UNIX and Windows"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"9.7","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
27 June 2012