IBM Support

IV98880: PRIVATE MEMORY LEAK BY DB2 IN A PURESCALE ENVIRONMENT

Fixes are available

DB2 Version 10.5 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 10.5 Fix Pack 10 for Linux, UNIX, and Windows
DB2 Version 10.5 Fix Pack 11 for Linux, UNIX, and Windows

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • In a pureScale environment the memory usage of db2sysc may keep
on increasing from svmon or "ps aux" output. The increase is
from non-db2 managed private memory, so cannot monitor it with
any Db2 utility.

By comparing the "db2pd -memblocks pid=$db2sysc_pid sort"
output from time to time, you can find the TotalCount/TotalSize
of File 0 keeps on increasing.

Sample output:
PoolID     PoolName   TotalSize(Bytes)     TotalCount LOC
File
OSSe       OSSe       1378644              393        5542  0
OSSe       OSSe       498192               194        8942  0

OSSe       OSSe       440320               860        4236  0
OSSe       OSSe       351232               686        4286  0
OSSe       OSSe       77368                9671       8932  0
OSSe       OSSe       62736                1307       5498  0
OSSe       OSSe       52992                552        4264  0

LOC could be different for different versions.

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED:                                              *
* ALL                                                          *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Db2 10.5 Fix Pack 9 or higher                     *
****************************************************************

    



Problem conclusion


    

  • First fixed in Db2 10.5 Fix Pack 9

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV98880
    • 

  • Reported component name
    DB2 PURESCALE F
    • 

  • Reported component ID
    5724Y6900
    • 

  • Reported release
    A50
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2017-08-09
    • 

  • Closed date
    2017-09-29
    • 

  • Last modified date
    2017-09-29
    • 





    

  • 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
    DB2 PURESCALE F
    • 

  • Fixed component ID
    5724Y6900
    • 



Applicable component levels


    

  • RA50  PSN
       UP
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSEPGG","label":"DB2 for Linux- UNIX and Windows"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"10.5","Line of Business":{"code":"LOB10","label":"Data and AI"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            13 January 2022
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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