Re: Database file copy
Alvaro Herrera <alvherre@commandprompt.com>
From: Alvaro Herrera <alvherre@commandprompt.com>
To: Bruce Momjian <bruce@momjian.us>
Cc: Srini Raghavan <sixersrini@yahoo.com>,
Robert Haas <robertmhaas@gmail.com>, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2011-01-13T20:18:02Z
Lists: pgsql-hackers
Excerpts from Bruce Momjian's message of jue ene 13 00:05:53 -0300 2011: > Srini Raghavan wrote: > > Thank you very much for reviewing, appreciate the feedback.? As pointed out by > > you, it is always best to test it out with the latest version, so, I tested the > > same approach with postgres 9.0.2 on windows just now, and it works! > > > > > > I forgot to mention earlier that in addition to setting vacuum_freeze_table_age > > to 0, vacuum_freeze_min_age must also be set to 0 to reset xmin with the > > FrozenXid. > > I wonder if you should be using VACUUM FREEZE instead of having to set > variables. The documentation says you shouldn't: FREEZE Selects aggressive "freezing" of tuples. Specifying FREEZE is equivalent to performing VACUUM with the vacuum_freeze_min_age parameter set to zero. The FREEZE option is deprecated and will be removed in a future release; set the parameter instead. http://www.postgresql.org/docs/9.0/static/sql-vacuum.html -- Álvaro Herrera <alvherre@commandprompt.com> The PostgreSQL Company - Command Prompt, Inc. PostgreSQL Replication, Consulting, Custom Development, 24x7 support