On 27.11.2012 09:47, Syed Asif Tanveer wrote:
> I am using PostgreSQL 9.1.5 for Data warehousing and OLAP puposes. Data size
> is around 100 GB and I have tuned my PostgreSQL accordingly still I am
> facing performance issues. The query performance is too low despite tables
> being properly indexed and are vacuumed and analyzed at regular basis. CPU
> usage never exceeded 15% even at peak usage times. Kindly guide me through
> if there are any mistakes in setting configuration parameters. Below are my
> system specs and please find attached my postgresql configuration parameters
> for current system.
The configuration looks OK to me at a quick glance. I'd suggest looking
at the access plans of the queries that are too slow (ie. EXPLAIN
ANALYZE). How low is "too low", and how fast do the queries need to be?
What kind of an I/O system does the server have? See also
https://wiki.postgresql.org/wiki/Slow_Query_Questions
- Heikki