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Re: Further pg_upgrade analysis for many tables

From: Simon Riggs <simon(at)2ndQuadrant(dot)com>
To: Jeff Janes <jeff(dot)janes(at)gmail(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Bruce Momjian <bruce(at)momjian(dot)us>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Magnus Hagander <magnus(at)hagander(dot)net>
Subject: Re: Further pg_upgrade analysis for many tables
Date: 2013-01-09 19:32:59
Message-ID: CA+U5nMJ4X0DO4zzL8DcYxnAeM7iCoNFr5VLGqFSNTafjJLNmiA@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-hackers
On 9 January 2013 17:50, Jeff Janes <jeff(dot)janes(at)gmail(dot)com> wrote:
> On Wed, Jan 9, 2013 at 3:59 AM, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
>> On 9 November 2012 18:50, Jeff Janes <jeff(dot)janes(at)gmail(dot)com> wrote:
>>
>>> quadratic behavior in the resource owner/lock table
>>
>> I didn't want to let that particular phrase go by without saying
>> "exactly what behaviour is that?", so we can discuss fixing that also.
>
> It is the thing that was fixed in commit eeb6f37d89fc60c6449ca1, "Add
> a small cache of locks owned by a resource owner in ResourceOwner."
> But that fix is only in 9.3devel.

That's good, it fixes the problem I reported in 2010, under
"SAVEPOINTs and COMMIT performance".

-- 
 Simon Riggs                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services


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