Re: Autovacuum behavior

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: John Scalia <jayknowsunix(at)gmail(dot)com>
Cc: "pgsql-admin(at)postgresql(dot)org" <pgsql-admin(at)postgresql(dot)org>
Subject: Re: Autovacuum behavior
Date: 2015-07-30 19:07:52
Message-ID: 20150730190752.GU2441@postgresql.org
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John Scalia wrote:
> autovacuum_vacuum_cost_limit is currently set at -1. Not really sure what
> it should be, as I still need to look that up.

Yes, I saw that from your snippet, but that value means to use the value
from vacuum_cost_limit. If that one is set to a positive value, it may
lead to sleeps during vacuum.

Also, tables could have values set in pg_class.reloptions, leading to
sleeps.

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

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