IBM Support

LI73627: HIGHER CPU CONSUMPTION AND REDUCED THROUGHPUT WHEN ACCESSING ROW S IN A COMPRESSED TABLE ON LINUX FOR SYSTEM P

Fixes are available

DB2 Version 9.5 Fix Pack 3b for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 2a for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 2  for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 4  for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 3a for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 3 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 4a for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 5 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 6a for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows

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APAR status

  • Closed as program error.

Error description

  • Due to a change in DB2 Version 9.5 Fixpack 1 on Linux for
System P, higher CPU consumption and reduced throughput may
occur when accessing rows in a compressed table. This would be
most noticeable on a select where lots of rows are read but few
returned.

Local fix

  • 



Problem summary


    

  • ****************************************************************
USERS AFFECTED:
DB2 Servers on Linux for System P
****************************************************************
PROBLEM DESCRIPTION:
A small performance degradation may be noticed when accessing
row compressed data from a table.
****************************************************************
RECOMMENDATION:
Upgrade to DB2 Version 9.5 Fixpack 2 or later
****************************************************************

    



Problem conclusion


    

  • First fixed in DB2 Version 9.5 Fixpack 2

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    LI73627
    • 

  • Reported component name
    DB2 UDE ESE LIN
    • 

  • Reported component ID
    5765F4104
    • 

  • Reported release
    950
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2008-07-27
    • 

  • Closed date
    2008-09-20
    • 

  • Last modified date
    2008-09-20
    • 





    

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

    • 

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

    
LI73668
    

    • 



Fix information


    

  • Fixed component name
    DB2 UDE ESE LIN
    • 

  • Fixed component ID
    5765F4104
    • 



Applicable component levels


    

  • R950  PSN
       UP
    • 








      
          
                    

          

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Document Information


            

            


                        

            Modified date:
            

            20 September 2008
            

            
            
          

        


        

        


      


    


  





    

  



  
    
      

      
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