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IV51077: HIGH MEMORY CONSUMPTION IN RMC DAEMON 15/05/05 PTF PECHANGE

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APAR status

  • Closed as program error.

Error description

  • Starting from rsct.core.rmc 3.1.4.4, the rmcd process sets a
higher stack size than it needs, in most cases resulting in a
running size of approximately 200 MB, compared to previous
sizes which at startup were usually at most 10-20 MB.
Note that this is only about the daemon's size at startup; the
daemon can still grow over time, depending on what size cluster
it is supporting, but many customers will never see 200 MB in
practice, and do not need that size to be defaulted to.

Local fix

  • Create the file /var/ct/cfg/mc.mlock with just one line of
content as follows:
    # cat /var/ct/cfg/mc.mlock
    p,200
    #

Then restart the RMC subsystem:
   # /usr/sbin/rsct/bin/rmcctrl -k
   # /usr/sbin/rsct/bin/rmcctrl -s

IMPORTANT: RMC cannot be safely recycled in an SAMP,
           PowerHA 7.1, or VIOS cluster environment.
           In these domains you must wait until the next
           available downtime to recycle, or if a reboot
           is planned then RMC will start with the smaller
           memory size after the next boot.

Problem summary

  • Starting from rsct.core.rmc 3.1.4.4, the rmcd process sets
a higher stack size than it needs, usually around 200MB.

Problem conclusion

  • The rmcd startup size has been corrected to normal.

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV51077
    • 

  • Reported component name
    RSCT/RMC FOR CS
    • 

  • Reported component ID
    5765F07AP
    • 

  • Reported release
    315
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    YesPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2013-10-18
    • 

  • Closed date
    2013-12-05
    • 

  • Last modified date
    2016-10-20
    • 





    

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

    • 

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

    
002PC0Ÿ
    

    • 



Fix information


    

  • Fixed component name
    RSCT/RMC FOR CS
    • 

  • Fixed component ID
    5765F07AP
    • 



Applicable component levels


    

  • R315  PSY  U874797
       UP16/10/20  I  1000  Ø
    • 



PTF to Fileset Mapping








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            20 October 2016
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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