One more note about my problem, when you run a query on older data in
the table then it work great but if you query newer data then is very slow.
Ex.
SELECT * from my_table WHERE date >=12/1/2005 and date <= 12/1/2006; <- slow
SELECT * from my_table WHERE date >=12/1/2002 and date <= 12/1/2003; <- fast
It just has to do with the new data for some reason.
Benjamin
Jeff Frost wrote:
On Sat, 23 Dec 2006, Benjamin Arai wrote:
The largest table in my database (30GB) has mysteriously went from
taking milli-seconds to perform a query to minutes. This disks are
fine and I have a 4GB shared_memory. Could this slow down have to do
with the fsm_max_pages or something else like that? I made it larger
but the queries still taking a long time. I do daily vacuum's but I
don't run it with -z or --full. I would like to avoid doing a --full
if possible because it would literally take over a week to complete.
Any help would be greatly appreciated.
Benjamin,
When is the last time you ran ANALYZE? That's what the -z option
does. If you're only vacuuming once daily, you should definitely
analyze with the -z flag as well.
