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From: Andrew Dunstan <andrew@dunslane.net>
To: Josh Berkus <josh@agliodbs.com>
Cc: Andres Freund <andres@2ndquadrant.com>
Cc: Jeff Janes <jeff.janes@gmail.com>
Cc: Amit Kapila <amit.kapila@huawei.com>
Cc: pgsql-performance@postgresql.org <pgsql-performance@postgresql.org>
Subject: Re: Performance bug in prepared statement binding in 9.2?
Date: Wed, 11 Sep 2013 15:06:23 -0400
Message-ID: <5230BF2F.8070600@dunslane.net> (raw)
In-Reply-To: <5230B801.90507@agliodbs.com>
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On 09/11/2013 02:35 PM, Josh Berkus wrote:
> All,
>
> We've confirmed that this issue is caused by having long-running idle
> transactions on the server.  When we disabled their queueing system
> (which prodiced hour-long idle txns), the progressive slowness went away.
>
> Why that should affect 9.X far more strongly than 8.4, I'm not sure
> about.  Does that mean that 8.4 was unsafe, or that this is something
> which *could* be fixed in later versions?
>
> I'm also confused as to why this would affect BIND time rather than
> EXECUTE time.
>


One thing that this made me wonder is why we don't have 
transaction_timeout, or maybe transaction_idle_timeout.

cheers

andrew


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