| From: | Hannu Krosing <hannu(at)skype(dot)net> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>, pgsql-patches(at)postgresql(dot)org |
| Subject: | Re: PATCH to allow concurrent VACUUMs to not lock each |
| Date: | 2005-05-23 09:49:42 |
| Message-ID: | 1116841783.4849.5.camel@fuji.krosing.net |
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| Thread: | |
| Lists: | pgsql-hackers pgsql-patches |
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(at)skype(dot)net>
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