From: Ed L. <pgsql@bluepolka.net>
To: Csaba Nagy <nagy@ecircle-ag.com>
Cc: Postgres general mailing list <pgsql-general@postgresql.org>
Cc: Bill Moran <wmoran@collaborativefusion.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Alvaro Herrera <alvherre@commandprompt.com>
Subject: Re: Index bloat of 4x
Date: Fri, 19 Jan 2007 10:19:52 -0700
Message-ID: <200701191019.52768.pgsql@bluepolka.net> (raw)
In-Reply-To: <1169197877.11526.10.camel@coppola.muc.ecircle.de>
References: <20070117093223.bcdb302e.wmoran@collaborativefusion.com>
<200701181842.00696.pgsql@bluepolka.net>
<1169197877.11526.10.camel@coppola.muc.ecircle.de>
On Friday January 19 2007 2:11 am, Csaba Nagy wrote:
>
> > I afraid I don't see how any of the answers I saw discussed
> > fit a 24x7 operation. Reindex, drop index, vacuum full, ...
> > they all block production queries of one sort or another for
> > significant periods of time (minutes) on large (multi/tens
> > of GB) tables, and thus are infeasible for true 24x7
> > operations.[snip]
>
> This is not completely true, as of 8.2 there is an online
> index build, and if that could be used in a background thread
> to rebuild the index and replace the bloated one once it's
> finished, that would be a non-blocking operation which could
> be done in 24x7 situations.
Online index creation definitely helps us toward 24x7. But
wouldn't we still have to drop the old index, thus blocking
production queries?
Ed
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To: pgsql-general@postgresql.org
Cc: pgsql@bluepolka.net, nagy@ecircle-ag.com, wmoran@collaborativefusion.com, tgl@sss.pgh.pa.us, alvherre@commandprompt.com
Subject: Re: Index bloat of 4x
In-Reply-To: <200701191019.52768.pgsql@bluepolka.net>
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