Re: [PERFORM] Postgresql is very slow

2008-06-24 Thread Ian Barwick
seful for troubleshooting. > > Definitely need a vacuum full on this table, likely followed by a reindex. This is a LIKE query with a wildcard at the start of the string to match, reindexing won't help much. Ian Barwick -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance

Re: [PERFORM] TEXT column and indexing

2003-11-19 Thread Ian Barwick
On Wednesday 19 November 2003 17:26, you wrote: > On Wed, 19 Nov 2003 10:18:18 +0100, Ian Barwick <[EMAIL PROTECTED]> > > wrote: > >Indexes: > >[...] > >"opv_v_ix" btree (substr(value, 1, 128)) > > > >SELECT obj_property_id > &g

Re: [PERFORM] TEXT column and indexing

2003-11-19 Thread Ian Barwick
On Wednesday 19 November 2003 17:35, Stephan Szabo wrote: > On Wed, 19 Nov 2003, Ian Barwick wrote: > > I have this table: (...) > > You probably need to be querying like: > WHERE substr(value,1,128)='foo'; > in order to use that index. > > While substr(txtcol

[PERFORM] TEXT column and indexing

2003-11-19 Thread Ian Barwick
like to keep the table as simple as possible. (For anyone wondering: yes, I can access the data using tsearch2 - via a different table in this case - but this is not always appropriate). Thanks for any hints. Ian Barwick [EMAIL PROTECTED] ---(end of broadcast)--- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faqs/FAQ.html