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IV19631: JVM CONTAINING MANY MONITORS AND THREADS IS SLOW TO WRITE A JAVA CORE.TXT FILE

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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
.
The JVM takes a long time to generate a javacore.txt file when
one is requested. This problem typically occurred when JVM has
hundreds of threads running and tens of thousands of monitors.

Local fix

  • 



Problem summary


    

  • This was a performance issue while producing the information for
the LOCKS section of the javacore.txt report.
One particular case was caused by the presence of hundreds of
threads and tens of thousands of classloaders each of which had
an associated monitor however monitors may be created for other
reasons.

    



Problem conclusion


    

  • This defect will be fixed in:
6.0.1 SR2
7.0.0 SR1
.
The JVM has been updated to gather this information more
efficiently.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV19631
    • 

  • 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
    2012-04-12
    • 

  • Closed date
    2012-04-12
    • 

  • Last modified date
    2012-04-12
    • 





    

  • 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
    • 








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            22 February 2022
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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