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

A fix is available

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You can track all active APARs for this component.

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



Document information

More support for: AIX family

Software version: 315

Operating system(s): AIX

Reference #: IV51077

Modified date: 20 October 2016