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IT08284: WMQ 8.0 QUEUE MANAGER BECOMES SLOW OR UNRESPONSIVE WHEN THE CLIENT CONNECTIONS INCREASE

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • When number of the connections increases, WebSphere MQ 8.0 queue
manager performance declines quickly, and becomes slow or
unresponsive then.
The FDCs with Probe IDs XC307100 and/or XC308010 might also be
generated with
high CPU usage from channel processes.

Probe Id :- XC307100
Component :- xlsRequestMutex
Program Name :- amqrmppa
Major Errorcode :- xecL_W_LONG_LOCK_WAIT

MQM Function Stack
ccxResponder
rrxResponder
rriAcceptSess
rriAcceptSessReceive
rriAddStatusEntry
xlsRequestMutex
xcsFFST

Probe Id :- XC308010
Component :- xlsReleaseMutex
Program Name :- amqrmppa
Major Errorcode :- xecL_W_LONG_LOCK_WAIT

MQM Function Stack
ccxResponder
rrxResponder
rriAcceptSess
rriAcceptSessReceive
rriAddStatusEntry
xlsReleaseMutex
xcsFFST

Local fix

  • 



Problem summary


    

  • ****************************************************************
USERS AFFECTED:
Users using MQ v8 queue manager with lot of MQ clients and/or
with clients often connecting and disconnecting.


Platforms affected:
MultiPlatform

****************************************************************
PROBLEM DESCRIPTION:
This problem occurred because of delay in scanning the channel
status table.

    



Problem conclusion


    

  • MQ has been modified to improve the performance when scanning
the channel status table.

---------------------------------------------------------------
The fix is targeted for delivery in the following PTFs:

Version    Maintenance Level
v8.0       8.0.0.2

The latest available maintenance can be obtained from
'WebSphere MQ Recommended Fixes'
http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037

If the maintenance level is not yet available information on
its planned availability can be found in 'WebSphere MQ
Planned Maintenance Release Dates'
http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
---------------------------------------------------------------

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IT08284
    • 

  • Reported component name
    WMQ BASE MULTIP
    • 

  • Reported component ID
    5724H7251
    • 

  • Reported release
    800
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2015-04-13
    • 

  • Closed date
    2015-04-29
    • 

  • Last modified date
    2015-05-05
    • 





    

  • 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
    WMQ BASE MULTIP
    • 

  • Fixed component ID
    5724H7251
    • 



Applicable component levels


    

  • R800  PSY
       UP
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.0.0.0","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            05 May 2015
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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