Performance drop after 5 days running web application, how to spot the bottleneck?

Question

I\'ve developed a web application using the following tech stack:

• Java
• Mysql
• Scala
• Play Framework
• DavMail integration (for cale

Answer 1

Yet another profiler is Yourkit.
It is commercial, but with trial period (two weeks). Actually, I've firstly tried VisualVM as @axel22 suggested, but our remote server was ssh'ed and we had problems with connecting via VisualVM (not saying that it is impossible, I've just surrendered after a few hours).