RESTful Rails Put/Post fail problem

So using Rails' REST resources routing, we end up with auto-generated routes that coordinate with Controller actions (I'll refrain from ranting about how I've replicated models twice, as well as...

Understanding escalating load/CPU usage on high-demand server for a short period of time

We have a mySQL slave in production that gets heavy additional usage for about 1 hour 15 minutes a day. A number of temporary servers run multiple threads each with a few heavy queries involving...