Re: OOM problems with 2.6.11-rc4

From: Sean
Date: Tue Mar 15 2005 - 17:02:23 EST

On Tue, March 15, 2005 3:44 pm, Noah Meyerhans said:
> Hello. We have a server, currently running 2.6.11-rc4, that is
> experiencing similar OOM problems to those described at
> and discussed further by several developers here (the summary is at
> We
> are running 2.6.11-rc4 because it contains the patches that Andrea
> mentioned in the kerneltraffic link. The problem was present in 2.6.10
> as well. We can try newer 2.6 kernels if it helps.
> The machine in question is a dual Xeon system with 2 GB of RAM, 3.5 GB
> of swap, and several TB of NFS exported filesystems. One notable point
> is that this machine has been running in overcommit mode 2
> (/proc/sys/vm/overcommit_memory = 2) and the OOM killer is still being
> triggered, which is allegedly not supposed to be possible according to
> the document above. We had been running in overcommit
> mode 0 until about a month ago, and experienced similar OOM problems
> then as well.

We're seeing this on our dual Xeon box too, with 4 GB of RAM and 2GB of
swap (no NFS) using stock RHEL 4 kernel. The only thing that seems to
keep it from happening is setting /proc/sys/vm/vfs_cache_pressure to


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