Yes, the database is being vacuum-ed and analyzed on a daily basis.

Our version is 7.2.1

-----Original Message-----
From: gnari [mailto:[EMAIL PROTECTED] 
Sent: Wednesday, November 24, 2004 4:35 PM
To: BBI Edwin Punzalan; [EMAIL PROTECTED]
Subject: Re: [PERFORM] FW: Index usage

From: "BBI Edwin Punzalan" <[EMAIL PROTECTED]>

> db=# explain analyze select date from chatlogs where date>='11/23/04' 
> and date<'11/25/04';
> Seq Scan on chatlogs  (cost=0.00..24763.19 rows=9200 width=4) (actual 
> time=0.45..4268.00 rows=23787 loops=1) Total runtime: 4282.81 msec
> ==============
> How come a query on the current date filter uses an index and the 
> others does not?  This makes indexing to speed up queries quite 
> difficult.

have you ANALYZED the table lately ?
what version postgres are you using ?


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TIP 8: explain analyze is your friend

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