Try to analyze your java process with http://java.sun.com/developer/technicalArticles/J2SE/jconsole.html and http://visualvm.java.net/
-----Original Message----- From: André Warnier [mailto:a...@ice-sa.com] Sent: martedì 12 aprile 2011 15:43 To: Tomcat Users List Subject: Re: Simple Tomcat monitoring ? Caldarale, Charles R wrote: >> From: André Warnier [mailto:a...@ice-sa.com] >> Subject: Simple Tomcat monitoring ? > >> 5396 root 20 0 832m 610m 9224 S 100 5.1 12:32.43 java > >> the second task visible above is the interface to the search engine). > > Which seems to be single-thread and thus a possible bottleneck. The 100% CPU > usage is very suspicious. I thought so too, but it does not seem to be. When I use the command ps -p 5396 -Lf I see multiple "instances", all running the same command. They all have the same PID, but different numbers in the "LWP" column (Light-Weight-Process ?). > >> which would be the easiest/quickest way of starting to figure out >> what this tomcat is doing, and where the system/application >> bottleneck might be ? > > This has proven to be a useful tool to look inside a running Tomcat: > http://moskito.anotheria.net/ > I had a (very) quick look at the website. From what I gather at this first look though, it seems already a bit "invasive", in the sense that it seems that to start collecting any information at all about a servlet or tomcat, the least one can do (unless one controls the source code of the application, which I do not), is to configure another classloader etc.. That means changing the Tomcat configuration and restarting Tomcat. That's maybe a bit more than what I am looking for right now. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
