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IV14206: INSERT AND QUERY PERFORMANCE IN IDENTITYHASHMAP

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Error Message: Java 1.6 runs much longer when inserting and
querying with IdentityHashMap than Java 1.5.
.
Stack Trace: N/A
.

Local fix

  • 



Problem summary


    

  • The root cause is that the original threshold is not a good
number for modulo, findIndex will transfer an array as its
parameter, and there are lots conflicts.

    



Problem conclusion


    

  • This defect will be fixed in:
6.0.0 SR11
6.0.1 SR2
.
The original threshold and findIndex has been changed, and the
number of conflict has been reduced to improve the performance.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV14206
    • 

  • Reported component name
    JAVA CLASS LIBS
    • 

  • Reported component ID
    620700130
    • 

  • Reported release
    600
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2012-01-28
    • 

  • Closed date
    2012-02-08
    • 

  • Last modified date
    2012-05-31
    • 





    

  • 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
    JAVA CLASS LIBS
    • 

  • Fixed component ID
    620700130
    • 



Applicable component levels


    

  • R600  PSY
       UP
    • 








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            31 May 2012
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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