Re: [exim] Is my server Overloaded?

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Autor: Marcin Owsiany
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A: exim-users
Assumpte: Re: [exim] Is my server Overloaded?
On Mon, Jun 20, 2005 at 10:53:45AM -0300, ppp2005@??? wrote:
> Hi all,
>
> Using VMSTAT can you say that my server is overloaded?
> It is a Dual Xeon 2.4 with 1.5 Gb Ram ecc and Scsi Disk (Supermicro) running Exim, Clamav, Spamassassin and Smtp / Pop3 for 7.000 users.
>
> This exemple is "VMSTAT 2"
>
> root@titan:~# vmstat 2
> procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
>  r  b   swpd   free   buff  cache   si   so    bi    bo   in    cs us sy id wa
> 25 22  36380 172932 321088 551944    0    0     9     8    0     3 18  4 78  0
>  9  0  36380 110916 321088 552596    0    0   118  3250 1194  2235 88 12  0  0
>  8  7  36380 178324 321296 551780    0    0   152  3184 1227  2229 84 16  0  0


The CPU utilization is high.. I guess SA and clamav are causing this,
but you can relatively easily move them to a separate machine.
Also the number of outgoing blocks is a little high, especially compared
to number of incoming blocks... I'm not sure what causes this, though.

I'd run a few filesystem benchmarks to find the maximum throughput - when
your utilization reaches values close to that, the load will start to
grow exponentially...

Marcin
--
Marcin Owsiany
porridge@???