[Ocfs2-users] High on buffers and deep on swap

[Sunil Mushran]

I couldn't see any bug fixes post 2.6.9-34 that specifically address 
this issue.
But then I could not see this issue on some of the 2.6.9-34 servers running
Oracle.

Ping your support rep. One would need to look at this more closely.

Luis Freitas wrote:
> Hi,
>  
>     This particular server is 2.6.9-34.ELsmp (RedHat 4.0) as this is 
> our production cluster and we did not update it recently.
>  
> Regards,
> Luis
>
> */Sunil Mushran <Sunil.Mushran at oracle.com>/* wrote:
>
>     Hmmm... the last time I saw your numbers, ocfs2's foot print was 15M.
>     You'll have to do better than that.
>
>     Anycase, Luis problem is the relationship between swap and cached
>     buffers.
>     Which kernel is this?
>
>     John Lange wrote:
>     > It seems that ocfs has an unfixed memory leak even in the most
>     recent
>     > version.
>     >
>     > I hope to make a more detailed bug report on Monday.
>     >
>     > John
>     >
>     > On Fri, 2007-02-23 at 15:31 -0800, Luis Freitas wrote:
>     >
>     >> Hi,
>     >>
>     >> This is a bit off topic, hope there is not a problem.
>     >>
>     >> Anyone out there experiencing high swapping with the kernel
>     >> retaining a large amount of buffers? This used to be a problem
>     on 2.4,
>     >> and I usually changed /proc/sys/vm/freepages to fix it. But on 2.6
>     >> this parameter no longer exists.
>     >>
>     >> One of the servers here is holding over 3.5Gb of cache even when
>     >> using over 700Mb of swap, and free memory is always low.
>     >>
>     >> [oracle at br001sv0432 ~]$ free
>     >> total used free shared buffers
>     >> cached
>     >> Mem: 5190736 4810880 379856 0 143032
>     >> 3583868
>     >> -/+ buffers/cache: 1083980 4106756
>     >> Swap: 2048248 723064 1325184
>     >> [oracle at br001sv0432 ~]$
>     >>
>     >> I am tuning /proc/sys/vm/swappiness, but this seems to have no
>     >> effect at all. Changed from 60 to 10 and seems to have no
>     effect. The
>     >> server runs Oracle RAC with OCFS2.
>     >>
>     >> Regards,
>     >> Luis
>     >>
>     >>
>     >>
>     >>
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