On Wed, 2008-05-28 at 16:59 -0700, Josh Berkus wrote:
> sort_mem: My tests with 8.2 and DBT3 seemed to show that, due to
> limitations of our tape sort algorithm, allocating over 2GB for a single
> sort had no benefit. However, Magnus and others have claimed otherwise.
> Has this improved in 8.3?
There is an optimum for each specific sort.
Your results cannot be used to make a global recommendation about the
setting of work_mem. So not finding any benefit in your tests *and*
Magnus seeing an improvement are not inconsistent events.
--
Simon Riggs www.2ndQuadrant.com
PostgreSQL Training, Services and Support
