Forgive me - I'm a n00b. Not much experience with VMware, but we're having a dickens of a problem and I'm looking for suggestions.
One VM guest is having major virtual disk read/write latency. It's spiking beyond 9000ms! Average is well over 500ms. This all just started on February 25th. We are not aware of any changes made to the system. This is a Cognos server which builds data cubes nightly. Normally it takes 2 hours to build the cube but over the last few days, that time has doubled and almost tripled last night. I've attached a couple of screen grabs from the perfomance graphs in vCenter. No other guests are having problems on any of our hosts.
We relocated the guest to a fresh, empty datastore. The latency seemed to improve, but only just a little (as in maybe 10% improvement). This amount of latency is orders of magnitude higher than we should see, isn't it? Any suggestions or ideas on what we can do? From the OS perspective, everything looks fine and dandy. No write delayed failed errors, no nothing at all. Operating the GUI feels sluggish, the latency is defintely felt there.
Any suggestions are GREATLY appreciated. Thank you, thank you, thank you.
--Alyssa