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Re: zmailer performance
On Fri, Nov 30, 2001 at 03:05:07PM +0000, Martin Zedek wrote:
> I provide ZMAILER (zmailer-184.108.40.206pre3.orig)
> and NFS server on one machine.
> Everything is OK, zmailer delivers mail on local
> filesystem (ext2 - hardware raid5 used)
> and clients use access through NFS to view them.
That sounds like a Linux system.
> The problem is that sometimes NFS rapidly losts
> permormance. If I try view mail locally, I get
> fast reply, when I use remote access throug NFS,
> access is 10times worser.
> After stopping zmailer, NFS replies in 1s again.
Possibly out of memory buffers, or some such.
Which Linux kernel version ?
A better place for this is email@example.com,
Suggested Subject: "NFS performance degrades when big local
programs are run". Do remember to tell kernel version, and
how much memory your machine has. Other technical data about
the machine, and kernel configuration might be usable for
> I think, there is no problem with disk performance
> (local reply is very fast). Do you think, there
> could be any connection betwen ZMAILER and NFS and
> forexample NETWORK performance??? (network transfers
> are about 1.5MB per s. (100MBit ethernet))
I prefer that experts of Linux kernel memory management,
and NFS services reply to you.
/Matti Aarnio <firstname.lastname@example.org>
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