On Jan 25, 2007, at 10:33 AM, Ray Stell wrote:
On Thu, Jan 25, 2007 at 08:04:49AM -0800, Joshua D. Drake wrote:
It really depends on the system. Most of our systems run anywhere
from
10-25ms. I find that any more than that, Vacuum takes too long.
How do you measure the impact of setting it to 12 as opposed to 15?
If you've got a tool that will report disk utilization as a
percentage it's very easy; I'll decrease the setting until I'm at
about 90% utilization with the system's normal workload (leaving some
room for spikes, etc). Sometimes I'll also tune the costs if reads
vs. writes are a concern.
--
Jim Nasby jim@xxxxxxxxx
EnterpriseDB http://enterprisedb.com 512.569.9461 (cell)
