Re: Subtransaction commits and Hot Standby

From: Simon Riggs <simon(at)2ndQuadrant(dot)com>
To: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
Cc: Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Subtransaction commits and Hot Standby
Date: 2008-09-18 14:59:19
Message-ID: 1221749959.3913.2451.camel@ebony.2ndQuadrant
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On Tue, 2008-09-16 at 10:11 -0400, Alvaro Herrera wrote:

> I wonder if the improved clog API required to mark multiple
> transactions as committed at once would be also useful to
> TransactionIdCommitTree which is used in regular transaction commit.

I've hacked together this concept patch (WIP).

Not fully tested yet, but it gives a flavour of the API rearrangements
required for atomic clog updates. It passes make check, but that's not
saying enough for a serious review yet. I expect to pick this up again
next week.

Simon Riggs
PostgreSQL Training, Services and Support

Attachment Content-Type Size
atomic_subxids.v3.patch text/x-patch 26.4 KB

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