Re: [RFC] LSN Map

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: Bruce Momjian <bruce(at)momjian(dot)us>
Cc: Marco Nenciarini <marco(dot)nenciarini(at)2ndquadrant(dot)it>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [RFC] LSN Map
Date: 2015-01-07 15:33:20
Message-ID: 20150107153320.GV1457@alvh.no-ip.org
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Bruce Momjian wrote:

> Have you done any measurements to determine how much backup can be
> skipped using this method for a typical workload, i.e. how many 16MB
> page ranges are not modified in a typical span between incremental
> backups?

That seems entirely dependent on the specific workload.

--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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