Re: Avoid full page images in streaming replication?

From: Bernd Helmle <mailings(at)oopsware(dot)de>
To: Andres Freund <andres(at)anarazel(dot)de>, Jim Nasby <Jim(dot)Nasby(at)BlueTreble(dot)com>
Cc: Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Avoid full page images in streaming replication?
Date: 2015-10-26 13:05:41
Message-ID: 292EA36F34951DA8248D1225@eje.credativ.lan
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--On 23. Oktober 2015 00:03:30 +0200 Andres Freund <andres(at)anarazel(dot)de>
wrote:

>
> Note that FPIs are often pretty good for replay performance, avoiding
> lots of synchronous random reads.

That's a very import argument, i think. The difference can be significant,
even if you have a decent storage, rendering a replica unusable. We had
examples in the past where only optimizing aggressive writes of FPIs lead
to an acceptable lag of the replica.

--
Thanks

Bernd

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