Message-ID: <425EBB16.4040900@archonet.com>
Date: Thu, 14 Apr 2005 19:48:54 +0100
From: Richard Huxton <dev@archonet.com>
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To: Andreas Joseph Krogh <andreak@officenet.no>
Cc: pgsql-sql@postgresql.org
Subject: Re: row-attribute in EXPLAIN-output doesn't match count(*)
References: <200504141838.14705.andreak@officenet.no>
	<425EA496.2030501@archonet.com>
	<200504141921.38476.andreak@officenet.no>
In-Reply-To: <200504141921.38476.andreak@officenet.no>
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Andreas Joseph Krogh wrote:
> On Thursday 14 April 2005 19:12, Richard Huxton wrote:
>>
>>So - do you have an application/client that has had a single transaction
>>open for a long time. A very long time unless you update this table a lot.
> 
> 
> Hm, it's a web-app, and I don't hold a transaction open for a long time on 
> purpose, but I have a line which says "idle in transaction" fromn "ps":
> 
> postgres  2754  1646  0 Apr06 ?        00:00:07 postgres: nbe nbeweb 127.0.0.1 
> idle in transaction

Some Java systems can open a transaction and leave it there idle. That 
one's been there since April 6th.

> And by the way, I lied about the PG-version, it's 7.4.5, not 8.0.0
> 
> So, what you're suggesting is that a restart of the webapp should make vacuum 
> able to delete those dead rows?

Exactly.

--
   Richard Huxton
   Archonet Ltd