From: | "Florian G(dot) Pflug" <fgp(at)phlo(dot)org> |
---|---|
To: | Heikki Linnakangas <heikki(at)enterprisedb(dot)com> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, ITAGAKI Takahiro <itagaki(dot)takahiro(at)oss(dot)ntt(dot)co(dot)jp>, pgsql-hackers(at)postgresql(dot)org, pgsql-patches(at)postgresql(dot)org |
Subject: | Re: [PATCHES] Aggressive freezing in lazy-vacuum |
Date: | 2007-03-05 19:41:40 |
Message-ID: | 45EC7274.20502@phlo.org |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers pgsql-patches pgsql-performance |
Heikki Linnakangas wrote:
> Florian G. Pflug wrote:
>> There could be a GUC vacuum_freeze_limit, and the actual FreezeLimit
>> would be calculated as
>> GetOldestXmin() - vacuum_freeze_limit
>
> We already have that. It's called vacuum_freeze_min_age, and the default
> is 100 million transactions.
>
> IIRC we added it late in the 8.2 release cycle when we changed the clog
> truncation point to depend on freeze limit.
Ok, that explains why I didn't find it when I checked the source - I
checked the 8.1 sources by accident ;-)
Anyway, thanks for pointing that out ;-)
greetings, Florian Pflug
From | Date | Subject | |
---|---|---|---|
Next Message | Tom Lane | 2007-03-05 19:41:45 | Re: Bug: Buffer cache is not scan resistant |
Previous Message | Simon Riggs | 2007-03-05 19:34:50 | Re: Bug: Buffer cache is not scan resistant |
From | Date | Subject | |
---|---|---|---|
Next Message | Simon Riggs | 2007-03-05 19:52:24 | Re: Heap page diagnostic/test functions (WIP) |
Previous Message | Tom Lane | 2007-03-05 19:31:07 | Re: Heap page diagnostic/test functions (WIP) |
From | Date | Subject | |
---|---|---|---|
Next Message | Stefan Kaltenbrunner | 2007-03-05 20:17:07 | Re: [kris@obsecurity.org: Progress on scaling of FreeBSD on 8 CPU systems] |
Previous Message | Heikki Linnakangas | 2007-03-05 19:30:00 | Re: [PATCHES] Aggressive freezing in lazy-vacuum |