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Always interested in offers/projects/new ideas. Eclectic experience in fields like: numerical computing; Python web; Java enterprise; functional languages; GPGPU; SQL databases; etc. Based in Santiago, Chile; telecommute worldwide. CV; email.

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© 2006-2015 Andrew Cooke (site) / post authors (content).

Tomcat Memory / CPU Problems

From: "andrew cooke" <andrew@...>

Date: Thu, 4 May 2006 21:08:13 -0400 (CLT)

Tomcat sometimes hangs while I'm developing.  On Windows I just assumed
this was normal, but I've moved the laptop to Linux this last week or two
and it's still happening.  The symptom is Java sticking at 100% and it's
likely a problem with GC (not enough memory).

But what is causing the memory problem?  I downloaded a free version of
JProbe - its kind of complicated and I can't get it to do what I want, but
it has a nice graph of the heap size which shows that the "zero point"
shifts each deploy.  That led me to this useful analysis -
http://opensource.atlassian.com/confluence/spring/pages/viewpage.action?pageId=2669

This is only a real problem during development, I think, and I can restart
Tomcat every now and then, so I'm going to ignore it for now...

Andrew

Good Read/Rant

From: "andrew cooke" <andrew@...>

Date: Thu, 4 May 2006 21:25:25 -0400 (CLT)

Interesting related article (a couple of links from page above) -
http://www.szegedi.org/articles/memleak.html

The commons logging people have a good point, though -
http://wiki.apache.org/jakarta-commons/Logging/UndeployMemoryLeak?action=print

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