Configuration Tuning for PostgreSQL 9.1 PostGIS 1.5 Ubuntu 12.04 Server

Posted by Martin on Server Fault See other posts from Server Fault or by Martin
Published on 2012-06-29T18:30:01Z Indexed on 2012/06/29 21:18 UTC
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ubuntu

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postgresql

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software-raid

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postgis

My server performance is poor. At times SSH, top, and other features or commands are very slow to respond, taking several seconds or more. A query that normally takes 5 minutes can sometimes take 30 minutes. The database is mostly being used to do a spatial query (grid and summarize) on approximately 500GB of stored data spread between 4 tables. Restarting the server works as a temporary fix, but cannot be used as a long term solution.

Any suggestions for how to diagnose and solve my performance issues?

Hardware and Configuration:

3.3 GHz Intel quad core i5
16 GB DDR3 RAM
6 TB software RAID 10 (6 x 2 TB drives)
Ubuntu 12.04 64-bit
Postgres 9.1
PostGIS 1.5

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