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Re: Hot Standby query cancellation and Streaming Replication integration

From: Richard Huxton <dev(at)archonet(dot)com>
To: Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>
Cc: Greg Smith <greg(at)2ndquadrant(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Hot Standby query cancellation and Streaming Replication integration
Date: 2010-02-26 14:24:30
Message-ID: 4B87D99E.6030608@archonet.com (view raw or flat)
Thread:
Lists: pgsql-hackers
On 26/02/10 14:10, Heikki Linnakangas wrote:
>
> Ideally the standby would stash away the old pages or tuples somewhere
> so that it can still access them even after replaying the WAL records
> that remove them from the main storage. I realize that's not going to
> happen any time soon because it's hard to do, but that would really be
> the most robust fix possible.

Something like snapshotting a filesystem, so updates continue while 
you're still looking at a static version.

-- 
   Richard Huxton
   Archonet Ltd

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