Re: Question on forcing cache data to write out

[Andrew Morton]

Phy Prabab <phyprabab@xxxxxxxxx> wrote:
>
> Sirs,
> 
> I am interested in understanding how tot tune the 2.6
> kernel such that I can get the WM to write out data
> that is held within the "cache".
> 
> My situtation is that I have a NFS file server that
> gets data in bursts.  The first couple of burst move
> quickly, but once the system memory becomes filled,
> mostly held in "cache", then my NFS performance drops.
>  The issue here is how to get the VM to write out the
> data held within the cache when times are slow (which
> amounts to 90% of the time)?  I have played a little
> bit with the /proc/sys/vm/dirty_ratio, etc with out
> much help.

Setting dirty_background_ratio lower might smooth things out.
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