Skip site navigation (1) Skip section navigation (2)

Re: First steps with 8.3 and autovacuum launcher

From: "Guillaume Smet" <guillaume(dot)smet(at)gmail(dot)com>
To: "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Stefan Kaltenbrunner" <stefan(at)kaltenbrunner(dot)cc>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: First steps with 8.3 and autovacuum launcher
Date: 2007-10-01 13:58:44
Message-ID: 1d4e0c10710010658y1ce9f75cn6a6fe4de71118d30@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-hackers
On 9/22/07, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Please try that experiment with all three configurations on both
> versions:
>         * autovacuum off
>         * autovacuum on, autovacuum_vacuum_cost_delay = 0
>         * autovacuum on, autovacuum_vacuum_cost_delay = 20

I've finally found some time to spend on these tests. Here are the results:

* 8.2.5 *
- autovacuum off + ANALYZE: less than 16 minutes (figures previously
posted in this thread) - default configuration of 8.2
- autovacuum on, delay 0: 16m29
- autovacuum on, delay 20: 16m13
(I didn't repeat the run but we can see that autovacuum doesn't
introduce too much slowdown during the restore operation)

* 8.3devel freshly compiled  *
- autovacuum off: 14m39
- autovacuum on, delay 0: 15m32
- autovacuum on, delay 20: 51m37 (the box is idle during a large
amount of this time) - default configuration of 8.3devel

-- 
Guillaume

In response to

Responses

pgsql-hackers by date

Next:From: Adrian MaierDate: 2007-10-01 15:27:57
Subject: Re: IDE
Previous:From: Pedro BelminoDate: 2007-10-01 13:42:23
Subject: IDE

Privacy Policy | About PostgreSQL
Copyright © 1996-2014 The PostgreSQL Global Development Group