Re: speed up restore from dump - Mailing list pgsql-general

From Alvaro Herrera
Subject Re: speed up restore from dump
Date
Msg-id 20081030201715.GM3857@alvh.no-ip.org
Whole thread Raw
In response to Re: speed up restore from dump  (Alan Hodgson <ahodgson@simkin.ca>)
List pgsql-general
Alan Hodgson wrote:
> On Thursday 30 October 2008, Joao Ferreira gmail
> > During restore:
> > # vmstat
> > procs --------memory------- ---swap-- -----io---- -system-- ----cpu----
> > r  b   swpd   free   buff  cache   si  so   bi   bo  in  cs us sy id wa
> > 3  1 230204   4972   1352 110128   2    1   17   63  24  56 12  2 85  0
> > #
>
> Does that machine really have only 256MB of RAM? And it's over 200MB into
> swap?

Huh, if that's the case then you should drop maintenance_work_mem a lot
(and not increase work_mem too much either), because having it high
enough that it causes swapping leads to worse performance.

--
Alvaro Herrera                                http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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