Re: select on 22 GB table causes "An I/O error occured while sending to the backend." exception

From: "Gregory Williamson" <Gregory(dot)Williamson(at)digitalglobe(dot)com>
To: "Bill Moran" <wmoran(at)collaborativefusion(dot)com>, "Greg Smith" <gsmith(at)gregsmith(dot)com>
Cc: <pgsql-performance(at)postgresql(dot)org>
Subject: Re: select on 22 GB table causes "An I/O error occured while sending to the backend." exception
Date: 2008-08-29 11:18:33
Message-ID: 8B319E5A30FF4A48BE7EEAAF609DB233021F3299@COMAIL01.digitalglobe.com
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Bill Moran wrote:

> In response to Greg Smith <gsmith(at)gregsmith(dot)com>:
>
>> <snipped...>
>
> I don't know, Greg. First off, the solution of making the postmaster
> immune to the OOM killer seems better than disabling overcommit to me
> anyway; and secondly, I don't understand why we should avoid making
> the PG documentation as comprehensive as possible, which seems to be
> what you are saying: "we shouldn't make the PG documentation too
> comprehensive, because then it will get very big"

I think it would be a hopeless morass for PostgreSQL to try to document each evolution of each OS it runs under; the general caveat seems fine, although perhaps adding something to the effect of "search the archives for possible specifics" might be in order. But tracking postgres's own shifts and requirements seems daunting enough w/out adding in endless flavours of different OSs.

My $0.02 worth ...

Greg Williamson
Senior DBA
DigitalGlobe

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