One presentation that I hope can get updated is Jon Haddad's very thorough presentation on Diagnosing Performance Problems in Production. I've seen another version somewhere where I believe he says something like "This should help you fix 99% of the problems you see." Seems right.
I'm sure it will be well attended and well viewed for some time. Here's the version I found: https://www.youtube.com/watch?v=2JlUpgsEdN8 If Jon did a new version I'd probably stop and watch it three times right now. If we started with that video inline on the Apache Cassandra web site in the troubleshooting section, that would help a lot of people because of the quality of the content and the density of the content. Kenneth Brotman
