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

Re: 8.4 path to repair_frag()?

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Tom Lanyon <tom+pgsql-hackers(at)oneshoeco(dot)com>
Cc: Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: 8.4 path to repair_frag()?
Date: 2012-04-18 16:03:07
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
Excerpts from Tom Lanyon's message of mié abr 18 12:44:11 -0300 2012:
> Hi all,
> To satisfy my own curiosity, I was trying to find where 8.4 kicks into a backwards scan of the data file during (auto-)vacuuming.
> This appears to be repair_frag() in backend/commands/vacuum.c, but only appears to be called by a FULL vacuum.  Autovacuum, however, appears to explicitly only ever call a not-FULL vacuum, so I'm trying to see where and how it would be possible for autovacuum to trigger this operation.  Any pointers?

See lazy_truncate_heap in vacuumlazy.c.

Álvaro Herrera <alvherre(at)commandprompt(dot)com>
The PostgreSQL Company - Command Prompt, Inc.
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

In response to

pgsql-hackers by date

Next:From: Robert HaasDate: 2012-04-18 16:05:03
Subject: Re: Bug #6593, extensions, and proposed new patch policy
Previous:From: Flavio VodzinskiDate: 2012-04-18 16:00:10
Subject: Postgres install program files folder

Privacy Policy | About PostgreSQL
Copyright © 1996-2017 The PostgreSQL Global Development Group