Re: [PERFORM] Index ot being used

2005-06-12 Thread Madison Kelly
Tobias Brox wrote: [EMAIL PROTECTED] - Fri at 12:10:19PM -0400] tle-bu=> EXPLAIN ANALYZE SELECT file_type, file_parent_dir, file_name FROM file_info_7; QUERY PLAN -

Re: [PERFORM] Index ot being used

2005-06-12 Thread Tom Lane
Madison Kelly <[EMAIL PROTECTED]> writes: >Here is my full query: > tle-bu=> EXPLAIN ANALYZE SELECT file_name, file_parent_dir, file_type > FROM file_info_7 WHERE file_type='d' ORDER BY file_parent_dir ASC, > file_name ASC; >This is my index (which I guess is wrong): > tle-bu=> \d file

Re: [PERFORM] Index ot being used

2005-06-12 Thread Bruno Wolff III
On Sun, Jun 12, 2005 at 10:12:27 -0400, Madison Kelly <[EMAIL PROTECTED]> wrote: > Indexes: > "file_info_7_display_idx" btree (file_type, file_parent_dir, file_name) > Here is my full query: > > tle-bu=> EXPLAIN ANALYZE SELECT file_name, file_parent_dir, file_type > FROM file_info_7 WHER

[PERFORM] Updates on large tables are extremely slow

2005-06-12 Thread Yves Vindevogel
Hi, I'm trying to update a table that has about 600.000 records. The update query is very simple :update mytable set pagesdesc = - pages ; (I use pagesdesc to avoid problems with sort that have one field in ascending order and one in descending order. That was a problem I had a week ago

Re: [PERFORM] Updates on large tables are extremely slow

2005-06-12 Thread Jacques Caron
Hi, At 19:40 12/06/2005, Yves Vindevogel wrote: Hi, I'm trying to update a table that has about 600.000 records. The update query is very simple :update mytable set pagesdesc = - pages ; (I use pagesdesc to avoid problems with sort that have one field in ascending order and one in desc

Re: [PERFORM] Index ot being used

2005-06-12 Thread Madison Kelly
Tom Lane wrote: Madison Kelly <[EMAIL PROTECTED]> writes: Here is my full query: tle-bu=> EXPLAIN ANALYZE SELECT file_name, file_parent_dir, file_type FROM file_info_7 WHERE file_type='d' ORDER BY file_parent_dir ASC, file_name ASC; This is my index (which I guess is wrong): tl

[PERFORM] Resource Requirements

2005-06-12 Thread elein
I've got a list of old resource requirements. I want to know how far off they are and if anything crucial is missing. My usual recommendation is "as much as you can afford" so I don't usually deal with real numbers :) RAM: Number of connections * 2MB Disk: Program and Manual 8-15M

Re: [PERFORM] Updates on large tables are extremely slow

2005-06-12 Thread Mark Kirkwood
Yves Vindevogel wrote: I'm trying to update a table that has about 600.000 records. The update query is very simple : update mytable set pagesdesc = - pages ; The query takes about half an hour to an hour to execute. I have tried a lot of things. Half an hour seem a bit long - I would expe

Re: [PERFORM] Index ot being used

2005-06-12 Thread Bruno Wolff III
On Sun, Jun 12, 2005 at 18:52:05 -0400, Madison Kelly <[EMAIL PROTECTED]> wrote: > > After sending that email I kept plucking away and in the course of > doing so decided that I didn't need to return the 'file_type' column. > Other than that, it would see my query now matches what you two ha

Re: [PERFORM] Index ot being used

2005-06-12 Thread Bruno Wolff III
On Sun, Jun 12, 2005 at 22:00:01 -0500, Bruno Wolff III <[EMAIL PROTECTED]> wrote: > On Sun, Jun 12, 2005 at 18:52:05 -0400, > Madison Kelly <[EMAIL PROTECTED]> wrote: > > > > After sending that email I kept plucking away and in the course of > > doing so decided that I didn't need to retur

Re: [PERFORM] Index ot being used

2005-06-12 Thread Madison Kelly
Bruno Wolff III wrote: On Sun, Jun 12, 2005 at 18:52:05 -0400, Madison Kelly <[EMAIL PROTECTED]> wrote: After sending that email I kept plucking away and in the course of doing so decided that I didn't need to return the 'file_type' column. Other than that, it would see my query now matches

Re: [PERFORM] Index ot being used

2005-06-12 Thread Madison Kelly
Bruno Wolff III wrote: On Sun, Jun 12, 2005 at 22:00:01 -0500, Bruno Wolff III <[EMAIL PROTECTED]> wrote: On Sun, Jun 12, 2005 at 18:52:05 -0400, Madison Kelly <[EMAIL PROTECTED]> wrote: After sending that email I kept plucking away and in the course of doing so decided that I didn't need

Re: [PERFORM] Index ot being used

2005-06-12 Thread Bruno Wolff III
On Sun, Jun 12, 2005 at 23:42:05 -0400, Madison Kelly <[EMAIL PROTECTED]> wrote: > > As you probably saw in my last reply, I went back to the old index and > tried the query you and Tom Lane recommended. Should this not have > caught the index? Probably, but there might be some other reason t

Re: [PERFORM] Index ot being used

2005-06-12 Thread Madison Kelly
Bruno Wolff III wrote: On Sun, Jun 12, 2005 at 23:42:05 -0400, Madison Kelly <[EMAIL PROTECTED]> wrote: As you probably saw in my last reply, I went back to the old index and tried the query you and Tom Lane recommended. Should this not have caught the index? Probably, but there might be