Java Performance Diagnosis Tools

prstat / prstat -mLp

• the last number of each column is the NLWP (number light weight processes aka threads) that are currently active.
• prstat -mLp will show the current threads for one process. The last column is the LWPID (light weight process ID)
• LWPID’s increment by one, hence the highest LWPID indicates how many threads have been launched since process creation.

ps -fLp

1. indicates how many threads have been launched since process creation.

truss -f -p /

1. new system calls for one thread

/usr/jdk/jdk1.6.0_10/bin/jstatd -J-Djava.security.policy=jstatd.all.policy -p 52074

1. starts an rmi server on the local host to be able to monitor application running on this host

/usr/jdk/jdk1.6.0_10/bin/jps -q

1. determines the running java processes

References:

http://prefetch.net/blog/index.php/2008/01/16/monitoring-garbage-collection-with-jstat/