g.-
On 2/13/06, Chris Browne <cbbrowne@xxxxxxx> wrote:
gbarosio@xxxxxxxxx (Guido Barosio) writes:
> quote: " If you are quite sure it has few if any dead tuples, it might be
> something to try to avoid VACUUMing except as needed to evade the 2^31
> transaction limit..."
> You may use the pg_stattuple software, included in the /contrib . This will show you the current scenery, and whether you shall clean or not dead tuples.
The trouble with pg_stattuple() is that running it is virtually as
expensive as running the vacuum. For a bit table, you pay all the I/O
cost, and any costs of the super-long-running-transaction and don't
even get any cleanup for that cost.
--
let name="cbbrowne" and tld=" cbbrowne.com" in name ^ "@" ^ tld;;
http://cbbrowne.com/info/lsf.html
Philosophy is a game with objectives and no rules.
Mathematics is a game with rules and no objectives.
---------------------------(end of broadcast)---------------------------
TIP 4: Have you searched our list archives?
http://archives.postgresql.org
--
/"\ ASCII Ribbon Campaign .
\ / - NO HTML/RTF in e-mail .
X - NO Word docs in e-mail .
/ \ -----------------------------------------------------------------
