[PERFORM] Unused table of view

2004-06-05 Thread Laurent Martelli
Hello, I'm using postgresql 7.4.2, and I have this view: slooze=# \d userpictures2 Vue «public.userpictures2» Colonne | Type | Modificateurs -+--+--- pictureid | integer | rollid | character v

Re: [PERFORM] Unused table of view

2004-06-05 Thread Tom Lane
Laurent Martelli <[EMAIL PROTECTED]> writes: > The pictures table is scanned, but it's not needed. Yes it is. For example, if pictures is empty then the view yields zero rows. Omitting the join to pictures could give a different result. regards, tom lane ---

Re: [PERFORM] Unused table of view

2004-06-05 Thread Laurent Martelli
> "Tom" == Tom Lane <[EMAIL PROTECTED]> writes: Tom> Laurent Martelli <[EMAIL PROTECTED]> writes: >> The pictures table is scanned, but it's not needed. Tom> Yes it is. For example, if pictures is empty then the view Tom> yields zero rows. Omitting the join to pictures could give a

[PERFORM] Using a COPY...FROM through JDBC?

2004-06-05 Thread Steve Wampler
I've got a simple database (no indices, 6 columns) that I need to write data quickly into through JDBC connections from multiple such connections simultaneously in a distributed environment. (This is going to be a message logging service for software generated messages.) Using a PreparedStatemen

Re: [PERFORM] Slow in morning hours

2004-06-05 Thread ohp
Have you tried VACUUM ANALYZE at least one a day? Regards On Fri, 20 Feb 2004 [EMAIL PROTECTED] wrote: > Date: Fri, 20 Feb 2004 14:46:15 +0530 > From: [EMAIL PROTECTED] > To: [EMAIL PROTECTED] > Cc: [EMAIL PROTECTED] > Subject: [PERFORM] Slow in morning hours > > Hi All, > > I am using Linux 7.2

Re: [PERFORM] General performance questions about postgres on Apple

2004-06-05 Thread scott.marlowe
On Fri, 20 Feb 2004, Sean Shanny wrote: > max_connections = 100 > > # - Memory - > > shared_buffers = 16000 # min 16, at least max_connections*2, > 8KB each > sort_mem = 256000 # min 64, size in KB You might wanna drop sort_mem somewhat and just set it during your impor