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From Pid <>
Subject Re: Tomcat 6.0.29 using more and more RAM until it collapses?
Date Fri, 12 Nov 2010 08:49:02 GMT
On 12/11/2010 05:54, Brian wrote:
> Hi Pid,
> I did it, but shows no results.
> Anyway, it was nice to learn about Jconsole.
> Now I wonder what is the tool I could use to inspect the objets inside my
> app, and see which ones are using all the memory. 

Try VisualVM, another JDK6 tool, but a more recent version is available:

There are extra plugins available from the Tools menu.

You can use profiling on local JVM processes to see which classes are
using memory, CPU time.  Or take a series of heap dump and import,
examine them.


>> -----Original Message-----
>> From: Pid []
>> Sent: Thursday, November 11, 2010 03:06 PM
>> To: Tomcat Users List
>> Subject: Re: Tomcat 6.0.29 using more and more RAM until it collapses?
>> On 11/11/2010 18:54, Brian wrote:
>>> I don't think my app is taking all this RAM, because when I restart
>>> it, the RAM usage doesn't go down. It does only if I restart Tomcat
>>> itself, instead of my app running there.
>> Yes, this is a classic sign of a problem with the app.
>> Reboot Tomcat, restart your app a couple of times (this bit is important).
>> Connect to the Tomcat instance using JConsole, navigate the MBeans, to
> Catalina
>>> Hosts > (your hostname), then select the Operations tab, under which
> you'll
>> see a button called "findReloadContextMemoryLeaks".
>> Push the button.
>> It will return a list of app names if Tomcat can detect ones with memory
> leaks.
>> NB  No results doesn't necessarily mean your app isn't leaking.
>> p
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