From: | Bruce Momjian <bruce(at)momjian(dot)us> |
---|---|
To: | Bruce Momjian <bruce(at)momjian(dot)us> |
Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, Jeff Davis <pgsql(at)j-davis(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Problem with pg_upgrade? |
Date: | 2011-03-30 21:44:13 |
Message-ID: | 201103302144.p2ULiDV29689@momjian.us |
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Lists: | pgsql-hackers |
Bruce Momjian wrote:
> > I wonder if the fact that these people never reported the bug means
> > there were doing something odd with their servers.
>
> I just updated the C comment about what we are doing:
>
> * Using autovacuum=off disables cleanup vacuum and analyze, but
> * freeze vacuums can still happen, so we set
> * autovacuum_freeze_max_age very high. We assume all datfrozenxid and
> * relfrozen values are less than a gap of 2000000000 from the current
> * xid counter, so autovacuum will not touch them.
FYI, 2000000000 is the maximum value for autovacuum_freeze_max_age, so a
user can't set it higher.
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ It's impossible for everything to be true. +
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