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

[Alexei_Roudnev]

Did you tried vm.swappiness parameter?

(/proc/sys/vm/swappiness)

  ----- 
  Original Message ----- 
  From: Brian Sieler 
  To: 'Luis Freitas' ; ocfs2-users at oss.oracle.com 
  Sent: Sunday, April 08, 2007 10:52 PM
  Subject: RE: [Ocfs2-users] High on buffers and deep on swap


  Luis, yes I am experiencing what appears to be a similar problem you are describing. See my post from just a few minutes ago on another thread.

   

  I run a 2-node cluster with OCFS2/RAC on 2.6.9-34.0.2.ELsmp (RHEL 4.0) as well.

   

               total       used       free     shared    buffers     cached

  Mem:       4044496    4005516      38980          0      34108    2236636

  -/+ buffers/cache:    1734772    2309724

  Swap:      2097144     648244    1448900

   

  If you've uncovered anything since posting this message, please pass it along?

   


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  From: ocfs2-users-bounces at oss.oracle.com [mailto:ocfs2-users-bounces at oss.oracle.com] On Behalf Of Luis Freitas
  Sent: Friday, February 23, 2007 5:32 PM
  To: ocfs2-users at oss.oracle.com
  Subject: [Ocfs2-users] High on buffers and deep on swap

   

  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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