From: Tom Lane <tgl@sss.pgh.pa.us>
To: Robert Treat <xzilla@users.sourceforge.net>
Cc: pgsql-hackers@postgresql.org
Subject: Re: [COMMITTERS] pgsql: Fix TransactionIdIsCurrentTransactionId() to use binary search
Date: Thu, 27 Mar 2008 17:11:37 -0400
Message-ID: <2092.1206652297@sss.pgh.pa.us> (raw)
In-Reply-To: <200803271656.45574.xzilla@users.sourceforge.net>
References: <20080317021856.0D2D37558DC@cvs.postgresql.org>
<200803271656.45574.xzilla@users.sourceforge.net>
Robert Treat <xzilla@users.sourceforge.net> writes:
> On Sunday 16 March 2008 22:18, Tom Lane wrote:
>> Fix TransactionIdIsCurrentTransactionId() to use binary search instead of
>> linear search when checking child-transaction XIDs.
> Are there any plans to backpatch this into REL8_3_STABLE?
No.
> It looks like I am
> hitting a pretty serious performance regression on 8.3 with a stored
> procedure that grabs a pretty big recordset, and loops through doing
> insert....update on unique failures. The procedure get progressivly slower
> the more records involved... and dbx shows me stuck in
> TransactionIdIsCurrentTransactionId().
If you can convince me it's a regression I might reconsider, but I
rather doubt that 8.2 was better,
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, xzilla@users.sourceforge.net, pgsql-hackers@postgresql.org
Subject: Re: [COMMITTERS] pgsql: Fix TransactionIdIsCurrentTransactionId() to use binary search
In-Reply-To: <2092.1206652297@sss.pgh.pa.us>
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