So, our drop in performance is now clearly due to pathological OS
behavior during checkpoints. Still trying to pin down what's going on,
but it's not system load; it's clearly related to the IO system.
Anyone else see this? I'm getting it both on 3.2 and 3.4. We're using
LSI Megaraid.
--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com