Query performance issue - Mailing list pgsql-performance

From Jayadevan M
Subject Query performance issue
Date
Msg-id OF6B813C80.12B50253-ON652578FD.00310FC3-652578FD.00317C74@ibsplc.com
Whole thread Raw
Responses Re: Query performance issue  (Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>)
Re: Query performance issue  (Sushant Sinha <sushant354@gmail.com>)
List pgsql-performance
Hello all,
I have a query which takes about 20 minutes to execute and retrieves 2000-odd records. The explain for the query is pasted here
http://explain.depesz.com/s/52f
The same query, with similar data structures/indexes and data comes back in 50 seconds in Oracle. We just ported the product to PostgreSQL and are testing it. Any input on what to look for?

Possible relevant parameters are
shared_buffers = 4GB                    
temp_buffers = 8MB                    
work_mem = 96MB                      
maintenance_work_mem = 1GB            
effective_cache_size = 8GB            
default_statistics_target = 50        

It is a machine with 16 GB RAM.
Regards,
Jayadevan





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