MIME-Version: 1.0
In-Reply-To: <1306346092-sup-2903@alvh.no-ip.org>
References: <4DDB64CB.7070109@2ndQuadrant.com>
	<1306269968-sup-2890@alvh.no-ip.org>
	<4DDC1DBF.3050306@2ndQuadrant.com>
	<1306346092-sup-2903@alvh.no-ip.org>
Date: Wed, 25 May 2011 19:24:09 +0100
Message-ID: <BANLkTimrkPyin52b=Kq5Hu6ikT5DZ9wW0A@mail.gmail.com>
Subject: Re: Improve warnings around CREATE INDEX CONCURRENTLY
From: Simon Riggs <simon@2ndQuadrant.com>
To: Alvaro Herrera <alvherre@commandprompt.com>
Cc: Greg Smith <greg@2ndquadrant.com>, pgsql-docs <pgsql-docs@postgresql.org>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

On Wed, May 25, 2011 at 6:57 PM, Alvaro Herrera
<alvherre@commandprompt.com> wrote:
> Excerpts from Greg Smith's message of mar may 24 17:06:07 -0400 2011:
>> On 05/24/2011 04:48 PM, Alvaro Herrera wrote:
>
>> > Incidentally, this is one of the things that Jim Nasby wanted exposed
>> > somehow so that these problems are more easily diagnosed. =A0I dropped=
 the
>> > ball on that one, but I'll be picking it up again at some point.
>>
>> I don't remember seeing anything about that before, but then again I
>> wasn't really looking for it until now. =A0Did you have a basic idea wha=
t
>> you wanted to do there? =A0I have enough of this work queued up now that=
 I
>> may end up poking at the code myself here soon.
>
> Please see this thread:
> http://archives.postgresql.org/message-id/1290465663-sup-9908@alvh.no-ip.=
org
>
>> The first thing I was considering was dropping some DEBUG2 level logging
>> about the various phases of the reindex into there.
>
> That would take this system more or less to where autovacuum was in 8.1
> (well, not quite that bad because you can change it locally, but still).
> It seems to me we can do something a bit better than that.

It would be fairly straightforward to add some text to the end of the
ps message for long running DDL commands to say "phase 2" etc..
Or pg_stat_activity query text.

That way we would have some visibility into the progress of long
running DDL without too much effort.

--=20
=A0Simon Riggs=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 http:/=
/www.2ndQuadrant.com/
=A0PostgreSQL Development, 24x7 Support, Training & Services