re: mmap over nfs leads to excessive system load

From: Kenny Simpson
Date: Tue Nov 08 2005 - 15:18:37 EST


I knew I forgoet something important in the info:
type nfs (rw,tcp,rsize=32768,wsize=32768,hard,intr,vers=3,tcp,rsize=32768,wsize=32768,hard,intr

-Kenny


--- Trond Myklebust <trond.myklebust@xxxxxxxxxx> wrote:

> On Tue, 2005-11-08 at 11:25 -0800, Kenny Simpson wrote:
> > Just another data point....
> > If I open the file with O_DIRECT.. not much changes:
>
> Hmm... Are you mounting using the -osync or -onoac options? Doing
> synchronous writes will tend to slow down flushing considerably, and the
> VM appears to be very fragile w.r.t. slow filesystems.
>
> Cheers,
> Trond




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