On Mon, 22 Jun 2009, Kevin Grittner wrote:

When I tried with setting the ring size to 16MB, I accidentally left off the step to copy the postgresql.conf file, and got better performance.

Do you have happen to have a build with assertions turned on? That is one common cause of performance going down via increased shared_buffers that people tend to run into during beta.

You can check via psql with

  show debug_assertions;

--
* Greg Smith gsm...@gregsmith.com http://www.gregsmith.com Baltimore, MD

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