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Re: pg_stop_backup does not complete

From: Josh Berkus <josh(at)agliodbs(dot)com>
To: Greg Smith <greg(at)2ndquadrant(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Simon Riggs <simon(at)2ndQuadrant(dot)com>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: pg_stop_backup does not complete
Date: 2010-02-25 01:47:19
Message-ID: 4B85D6A7.4040302@agliodbs.com (view raw or flat)
Thread:
Lists: pgsql-hackers
On 2/24/10 5:36 PM, Greg Smith wrote:
> gsmith=# select pg_stop_backup();
> NOTICE:  pg_stop_backup cleanup done, waiting for required segments to
> archive
> WARNING:  pg_stop_backup still waiting for all required segments to
> archive (60 seconds elapsed)
> HINT:  Confirm your archive_command is executing successfully. 
> pg_stop_backup can be aborted safely, but the resulting backup will not
> be usable.
> ^CCancel request sent
> ERROR:  canceling statement due to user request

This looks really good, thanks!

> Does this solve the logging side of this?  You can still make a case for
> a more forceful pg_stop_backup, this seems to at least remove much of
> the mystery and frustration from the whole exercise.  This patch plus a
> little documentation suggesting how to recover from this issue might be
> enough.

Yeah, the concern is user-friendliness.  As Simon points out, allowing
pg_stop_backup to abort would have other unexpected-results issues.

--Josh Berkus


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