Hi all,

      I have 10 million records in my postgres table.I am running the database 
in amazon ec2 medium instance. I need to access the last week data from the 
table.
It takes huge time to process the simple query.So, i throws time out exception 
error.

query is :
     select count(*) from dealer_vehicle_details where modified_on between 
'2012-10-01' and '2012-10-08' and dealer_id=270001;

After a lot of time it responds 1184 as count

what are the ways i have to follow to increase the performance of this query?
 
The insertion also going parallel since the daily realtime updation.

what could be the reason exactly for this lacking performace?


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