From: | "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com> |
---|---|
To: | CAJ CAJ <pguser(at)gmail(dot)com> |
Cc: | Ralph Mason <ralph(dot)mason(at)telogis(dot)com>, pgsql-performance(at)postgresql(dot)org |
Subject: | Re: Performance Woes |
Date: | 2007-05-10 00:29:51 |
Message-ID: | 4642677F.80209@commandprompt.com |
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Thread: | |
Lists: | pgsql-performance |
> 2007-05-09 03:07:50.083 GMT 1146975740: LOCATION: BasicOpenFile,
> fd.c:471
>
> 2007-05-09 03:07:50.091 GMT 0: LOG: 00000: duration: 12.362 ms
>
> 2007-05-09 03:07:50.091 GMT 0: LOCATION: exec_simple_query,
> postgres.c:1090
>
>
>
> So we decreased the max_files_per_process to 800. This took care
> of the error **BUT** about quadrupled the IO wait that is happening
> on the machine. It went from a peek of about 50% to peeks of over
> 200% (4 processor machines, 4 gigs ram, raid). The load on the
> machine remained constant.
>
Sounds to me like you just need to up the total amount of open files
allowed by the operating system.
Joshua D. Drake
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