| From: | Florian Weimer <fweimer(at)bfk(dot)de> | 
|---|---|
| To: | Willo van der Merwe <willo(at)mirasol(dot)co(dot)za> | 
| Cc: | Jean-David Beyer <jeandavid8(at)verizon(dot)net>, pgsql-performance(at)postgresql(dot)org | 
| Subject: | Re: Hardware spec | 
| Date: | 2007-09-06 14:19:03 | 
| Message-ID: | 82k5r3op0o.fsf@mid.bfk.de | 
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| Lists: | pgsql-performance | 
* Willo van der Merwe:
> Good advice. After running a vmstat and iostat, it is clear, to my
> mind anyway, that the most likely bottleneck is IO, next is probably
> some more RAM.
> Here's the output:
> procs -----------memory---------- ---swap-- -----io---- --system-- 
> ----cpu----
> r  b   swpd   free   buff  cache   si   so    bi    bo   in    cs us
> sy id wa
> 0  0  29688  80908 128308 3315792    0    0     8    63    6     8 17
> 2 80  1
You need to run "vmstat 10" (for ten-second averages) and report a
couple of lines.
> avg-cpu:  %user   %nice    %sys %iowait   %idle
>          17.18    0.00    1.93    0.81   80.08
Same for iostat.
Your initial numbers suggest that your server isn't I/O-bound, though
(the percentage spent in iowait is much too small, and so are the tps
numbers).
-- 
Florian Weimer                <fweimer(at)bfk(dot)de>
BFK edv-consulting GmbH       http://www.bfk.de/
Kriegsstraße 100              tel: +49-721-96201-1
D-76133 Karlsruhe             fax: +49-721-96201-99
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