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From: Tom Molesworth <tom@audioboundary.com>
To: pgsql-performance@postgresql.org
Subject: Re: sudden spurt in swap utilization (was:cpu bound 	postgresql setup.)
Date: Fri, 25 Jun 2010 17:39:05 +0100
Message-ID: <4C24DBA9.7030303@audioboundary.com> (raw)
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On 25/06/10 16:59, Rajesh Kumar Mallah wrote:
> when i reduce max_connections i start getting errors, i will see again 
> concurrent connections
> during business hours. lot of our connections are in <IDLE in 
> transaction state> during business
> this peculiar  behavior of  mod_perl servers have been discussed in 
> past i think. dont' remember
> if there was any resolution.

If connections spend any significant amount of time in <IDLE in 
transaction> state, that might indicate you're not committing/rolling 
back after running queries - can you show an example of the code you're 
using?

e.g. something like my $dbh = DBI->connect(...); my $sth = 
$dbh->prepare(q{select ... }); $sth->fetchall_arrayref; $sth->rollback;

Tom




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