| From: | Michael Fuhr <mike(at)fuhr(dot)org> |
|---|---|
| To: | Alex <alex(at)meerkatsoft(dot)com> |
| Cc: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: TRUNCATE Question |
| Date: | 2005-11-10 02:38:20 |
| Message-ID: | 20051110023820.GA89826@winnie.fuhr.org |
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| Thread: | |
| Lists: | pgsql-general |
On Thu, Nov 10, 2005 at 01:16:24PM +1100, Alex wrote:
> could anyone tell me if it is necessary to run a Vacuum after truncating
> a table or is that done automatically.
http://www.postgresql.org/docs/8.0/interactive/maintenance.html#VACUUM-FOR-SPACE-RECOVERY
"If you have a table whose contents are deleted on a periodic basis,
consider doing it with TRUNCATE rather than using DELETE followed by
VACUUM. TRUNCATE removes the entire content of the table immediately,
without requiring a subsequent VACUUM or VACUUM FULL to reclaim the
now-unused disk space."
--
Michael Fuhr
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