Symptom:

• System is performing slow
• Response time is slow
• Some of the request is responding slow

There are various way you can find set of current running threads in CQ:

Within CQ:

Go to HOST:PORT/system/console/config and navigate to thread tab to find all running thread.

Using java tool:

• first find process ID of CQ process. You can use command ps -ef | grep java | grep <author or publish> in unix based system and Ctrl + Shift + Esc in window
• Then you can use jstack tool to get thread dump using command jstack <PID> >> thread.txt and run same command for 10 times in interval of 2 second.
• Once you have thread dump you can use any thread analyzer tool to find long running thread

You can use any of following tool to analyze thread dump

1. http://technet.microsoft.com/en-us/sysinternals/bb897553.aspx
2. http://www.jroller.com/dumpster/entry/tda_as_jconsole_plugin
3. https://tda.dev.java.net/files/documents/4691/113000/tda-bin-2.1.zip
4. http://docs.day.com/en/home/docutools/javadump_exe.html
5. http://yusuke.homeip.net/samurai/en/samurai.jar

Some Useful Links:

1. http://helpx.adobe.com/cq/kb/TakeThreadDump.html
2. http://planet.jboss.org/post/simple_tools_to_analyze_thread_dumps