From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
---|---|
To: | Steve Kehlet <steve(dot)kehlet(at)gmail(dot)com> |
Cc: | Forums postgresql <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: delaying autovacuum freeze via storage params? |
Date: | 2015-05-27 02:27:29 |
Message-ID: | 20150527022729.GA5885@postgresql.org |
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Lists: | pgsql-general |
Steve Kehlet wrote:
> Hello, I'd like to postpone an "autovacuum: VACUUM public.mytable (to
> prevent wraparound)" and handle it manually at another time. I thought I
> could set these storage parameters on the large table in question
> ("mytable") like this:
>
> ALTER TABLE mytable SET (
> autovacuum_freeze_min_age=10000000,
> autovacuum_freeze_table_age=800000000,
> autovacuum_freeze_max_age=1000000000
> );
See the docs about the freeze max age storage parameter -- the per-table
setting can decrease the global setting but not increase it. You can
increase the global setting (postgresql.conf) to 2 billion AFAIR which
should give you plenty of room. Needs a server restart though.
--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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