From: | Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com> |
---|---|
To: | Adarsh Sharma <adarsh(dot)sharma(at)orkash(dot)com> |
Cc: | pgsql-performance(at)postgresql(dot)org |
Subject: | Re: Postgres Performance Tuning |
Date: | 2011-04-04 12:14:19 |
Message-ID: | BANLkTimKEM9jVFPnSEBWd4R7T7vcrnjBRw@mail.gmail.com |
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Lists: | pgsql-performance |
On Mon, Apr 4, 2011 at 5:51 AM, Adarsh Sharma <adarsh(dot)sharma(at)orkash(dot)com> wrote:
>
>
> Thanks Scott :
>
> My iostat package is not installed but have a look on below output:
>
> [root(at)s8-mysd-2 8.4SS]# vmstat 10
> procs -----------memory---------- ---swap-- -----io---- --system--
> -----cpu------
> r b swpd free buff cache si so bi bo in cs us sy id
> wa st
> 1 0 147664 93920 72332 15580748 0 1 113 170 47 177 6 1
> 92 1 0
> 0 0 147664 94020 72348 15580748 0 0 0 4 993 565 0 0
> 100 0 0
> 0 0 147664 93896 72364 15580748 0 0 0 5 993 571 0 0
> 100 0 0
> 0 0 147664 93524 72416 15580860 0 0 0 160 1015 591 0 0
> 100 0 0
> 0 0 147664 93524 72448 15580860 0 0 0 8 1019 553 0 0
> 100 0 0
> 0 0 147664 93648 72448 15580860 0 0 0 0 1019 555 0 0
> 100 0 0
> 0 0 147664 93648 72448 15580860 0 0 0 3 1023 560 0 0
> 100 0 0
OK, right now your machine is at idle. Run vmstat / iostat when it's
under load. If the wa column stays low, then you're not IO bound but
more than likely CPU bound.
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