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

`visualvm˙ is also a great tool for such purposes, you can connect to a remote JVM as well and see what's inside.

I suggest you doing this:

• take a snapshot of the application running since few hours and since 5 days
• compare thread counts
• compare object counts, search for increasing numbers
• see if your program spends more time in particular methods on the 5th day than on the 1str one
• check for disk space, maybe you are running out of it

Answer 2

To eliminate your database you can monitor slow queries (and/or queries that are not using an index) using the slow query log see: http://dev.mysql.com/doc/refman/5.1/en/slow-query-log.html

I would hazard a guess that you have a missing index, and it has only become apparent as your data volumes have increased.