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PM07063: IMPROVEMENTS TO DRS SCALABILITY

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APAR status

  • Closed as program error.

Error description

  • Under heavy load DRS invalidations can cause performance
degradation.

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server V7.0 using data replication          *
*                  services (DRS).                             *
****************************************************************
* PROBLEM DESCRIPTION: WebSphere Portal invalidations can      *
*                      cause performance degradation or a      *
*                      deadlock in the control and servant     *
*                      regions.                                *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
DRS uses the Object Request Broker (ORB) to communicate
between the control region and the servant regions. There are
a limited number of threads receiving incoming messages and a
deadlock can occur if a servant region communicates
back to the control region while processing an incoming
message.

    



Problem conclusion


    

  • The communication between the control region and servant
region has been modified to avoid the deadlock situation.

APAR PM07063 is currently targeted for inclusion in Service
Level (Fix Pack) 7.0.0.11 of WebSphere Application Server V7.0.

Please refer to URL:
//www.ibm.com/support/docview.wss?rs=404&uid=swg27006970
for Fix Pack availability.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    PM07063
    • 

  • Reported component name
    WEBSPHERE FOR Z
    • 

  • Reported component ID
    5655I3500
    • 

  • Reported release
    700
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2010-02-08
    • 

  • Closed date
    2010-03-22
    • 

  • Last modified date
    2010-07-02
    • 





    

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

    
PM06555
    

    • 

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

    • 



Fix information


    

  • Fixed component name
    WEBSPHERE FOR Z
    • 

  • Fixed component ID
    5655I3500
    • 



Applicable component levels


    

  • R700  PSY  UK57722
       UP10/06/17  P  F006
    • 



Fix is available


    

  • Select the PTF appropriate for your component level.
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              [{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SS7K4U","label":"WebSphere Application Server for z\/OS"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            10 February 2022
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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