Horton

Re: PATCH to allow concurrent VACUUMs to not lock each

Hannu Krosing <hannu@skype.net>

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From: Hannu Krosing <hannu@skype.net>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Bruce Momjian <pgman@candle.pha.pa.us>, pgsql-patches@postgresql.org
Date: 2005-05-23T09:49:42Z
Lists: pgsql-hackers 
On K, 2005-05-18 at 11:54 +0300, Hannu Krosing wrote:
> The attached patch allows VACUUMS's on small relations to clean up dead
> tuples while VACUUM or ANALYSE is running for a long time on some big
> table.
> 
> This is done by adding a "bool inVacuum" to PGPROC and then making use
> of it in GetOldestXmin.
> 
> This patch is against current CVS head, but should also apply to 8.0.2
> with minorpach  warnings.

Could this patch be applied (or rejected if something is badly wrong
with it) ?

Or should I move the discussion back to pgsql-hackers ad try to make it
a TODO first ?

This patch implements what I described in
http://archives.postgresql.org/pgsql-hackers/2005-05/msg00704.php
plus a small change to make it work for simple ANALYSE too.

-- 
Hannu Krosing <hannu@skype.net>