On Jun 16, 2006, at 5:11 AM, Tim Allen wrote:
One curious thing is that some postgres backends seem to spend an inordinate amount of time in uninterruptible iowait state. I found a posting to this list from December 2004 from someone who reported that very same thing. For example, bringing down postgres on the customer box requires kill -9, because there are invariably one or two processes so deeply uninterruptible as to not respond to a politer signal. That indicates something not quite right, doesn't it?
Sounds like there could be a driver/array/kernel bug there that is kicking the performance down the tube.
If it was PG's fault it wouldn't be stuck uninterruptable. -- Jeff Trout <jeff@xxxxxxxxxxxxx> http://www.dellsmartexitin.com/ http://www.stuarthamm.net/
