Date: Fri, 7 May 2010 10:10:31 -0400
From: Mark Stosberg <mark@summersault.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: debugging handle exhaustion and 15 min/ 5mil row delete
Message-ID: <20100507101031.3442dd08@summersault.com>
In-Reply-To: <4BE3C4C9.60601@uci.cu>
References: <20100507093742.20c715b1@summersault.com> <4BE3C4C9.60601@uci.cu>
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> You can use TRUNCATE instead DELETE. TRUNCATE is more efficient and 
> faster that DELETE.

Thanks for the suggestion. However, TRUNCATE is not compatible with
Slony, and we also have some rows which remain in table. 

> Now, we need more information about your system to give you a certain 
> solution:
> Are you using a RAID controller for you data? 

Yes.

> Do you have separated the xlog directory from the data directory?

No.

> Which is your Operating System?

FreeBSD.

> Which is you architecture?

i386.

Thanks for the feedback. I'm going to try batching the deletes for now,
which is approach was worked well for some of our other long-running
deletes.

    Mark