My Ubuntu 9.04 server on Slicehost is periodically freezing, and not responding to ssh or console access. I believe it is some kind of resource starvation or swap death issue.
This has been happening every few days, and I need to figure out what is causing it. Can anyone recommend the simplest way to do this?
Someone recommended "sar", and I've installed it, but its not clear to me whether it can pinpoint a specific troublesome process, or whether it is running frequently enough to catch the likely culprit.