On 02/19/2012 05:37 AM, Simon Riggs wrote:
> Please retest with wal_buffers 128MB, checkpoint_segments 1024
The test parameters I'm using aim to run through several checkpoint
cycles in 10 minutes of time. Bumping up against the ugly edges of
resource bottlenecks is part of the test. Increasing
checkpoint_segments like that would lead to time driven checkpoints,
either 1 or 2 of them during 10 minutes. I'd have to increase the total
testing time by at least 5X to get an equal workout of the system. That
would be an interesting data point to collect if I had a few weeks to
focus just on that test. I think that's more than pgbench testing
deserves though.
--
Greg Smith 2ndQuadrant US greg@2ndQuadrant.com Baltimore, MD
PostgreSQL Training, Services, and 24x7 Support www.2ndQuadrant.com
