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failcnt in privvmpages [message #48691]

Wed, 31 October 2012 18:35

iLinux85
Messages: 15
Registered: March 2010

Junior Member

how could i fix privvmpages failcnt for the following UBC result

            kmemsize       23180312   42371648 2147483646 2147483646          0
            lockedpages        8189       8197     999999     999999          0
            privvmpages      813490    1104963    1048576    1048576       3940
            shmpages          67434     267043     524288     524288          0
            numproc             142        311     999999     999999          0
            physpages        246534     356916          0 2147483647          0
            vmguarpages           0          0     524288 2147483647          0
            oomguarpages     251168     359874     524288 2147483647          0
            numtcpsock           53        173    7999992    7999992          0
            numflock             22         43     999999     999999          0
            numpty                1          3     500000     500000          0
            numsiginfo            1         31     999999     999999          0
            tcpsndbuf       1032640    2811200  214748160  396774400          0
            tcprcvbuf        868352    3450496  214748160  396774400          0
            othersockbuf      83840    4310528  214748160  396774400          0
            dgramrcvbuf           0     443712  214748160  396774400          0
            numothersock         62        206    7999992    7999992          0
            dcachesize      2413004    2743012 2147483646 2147483646          0
            numfile            7780       9649   23999976   23999976          0
            numiptent            39         39     999999     999999          0
            swappages          4634       4662          0          0          0

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Re: failcnt in privvmpages [message #48727 is a reply to message #48691]

Sun, 11 November 2012 12:37

seanfulton
Messages: 105
Registered: May 2007

Senior Member

What kernel are you using?

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Re: failcnt in privvmpages [message #48732 is a reply to message #48691]

Mon, 12 November 2012 21:25

iLinux85
Messages: 15
Registered: March 2010

Junior Member

Linux 2.6.18-274.7.1.el5.028stab095.1PAE #1 SMP Mon Oct 24 21:55:06 MSD 2011 i686 i686 i386 GNU/Linux

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Re: failcnt in privvmpages [message #48734 is a reply to message #48732]

Mon, 12 November 2012 21:45

seanfulton
Messages: 105
Registered: May 2007

Senior Member

If you can, upgrade to the 2.6.32 kernel series (RH6). It makes memory management very simple, just

vzctl set VEID --physpages 0:xG --save
vzctl set VEID --swappages 0:xG --save

If you can't do that, try running vzsplit. It will divide your machine into even chunks and you can tweak from there.

Just increasing privvmpages:

vzctl set VEID --privvmpages ##:## --save

is a quick fix but that setting is one of three or five that control memory and it is difficult to tweak them if you don't know what you are doing. What will happen is you will likely get things mis-aligned and then when the system gets under load you will have problems. The easiest thing to do is run RHEL6/CENTOS6/SL6--the new kernels are much, much easier to manage.

sean

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