Folks,
We're seeing some odd issues with hyperthreading-capable Xeons, whether or not
hyperthreading is enabled. Basically, when a small number of really-heavy
duty queries hit the system and push all of the CPUs to more than 70% used
(about 1/2 user & 1/2 kernel), the system goes to 100,000+ context switcthes
per second and performance degrades.
I know that there's other Xeon users on this list ... has anyone else seen
anything like that? The machines are Dells running Red Hat 7.3.
--
-Josh Berkus
Aglio Database Solutions
San Francisco