Re: Truncate and delete adds wal logs for slave to process. - Mailing list pgsql-general

From Alvaro Herrera
Subject Re: Truncate and delete adds wal logs for slave to process.
Date
Msg-id 20100211233013.GK3145@alvh.no-ip.org
Whole thread Raw
In response to Truncate and delete adds wal logs for slave to process.  (Chris Barnes <compuguruchrisbarnes@hotmail.com>)
List pgsql-general
Chris Barnes wrote:

> Because both truncate and delete, I would think that this action would
> be put into the pg_log as a log file that can be rolled back. And,
> when complete, it would be shipped to the standby to be processed?

You would be wrong -- truncate does not log the full data, only the fact
that a truncate happened.  In order to be able to roll it back, the
underlying file is kept around until transaction commit.

--
Alvaro Herrera                                http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

pgsql-general by date:

Previous
From: Francisco Reyes
Date:
Subject: Alter index .. set tablespace uses ACCESS EXCLUSIVE lock?
Next
From: David Kerr
Date:
Subject: Re: Deadlock Detected