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IV36441: POOR PERFORMANCE WHEN CREATING EMPTY CLASSLOADERS

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Error Message: N/A
.
Stack Trace: N/A
.
When using empty classloaders the native footprint of the java
process is larger then it needs to be, in extreme scenarios this
can cause poor performance and native Out Of Memory issues.

Local fix

  • 



Problem summary


    

  • The problem is caused because the JVM instantiates classloaders
fully when they are constructed, increasing their native memory
footprint before classes are loaded

    



Problem conclusion


    

  • This defect will be fixed in:
6.0.1 SR6
7.0.0 SR5
6.0.0 SR14
.
The JVM has been updated to instantiate class loaders only when
the class loader loads a class.

    



Temporary fix



Comments


    

  • 



APAR Information




    

  • APAR number
    IV36441
    • 

  • Reported component name
    J9 COMMON CODE
    • 

  • Reported component ID
    620700127
    • 

  • Reported release
    260
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2013-02-06
    • 

  • Closed date
    2013-02-06
    • 

  • Last modified date
    2014-05-09
    • 





    

  • 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
    J9 COMMON CODE
    • 

  • Fixed component ID
    620700127
    • 



Applicable component levels


    

  • R260  PSY
       UP
    • 

  • R600  PSY
       UP
    • 








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            21 February 2022
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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