Christopher Schultz schrieb:
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Johannes,
On 3/31/2009 9:56 AM, Haase, Johannes | SCARUS wrote:
"-Xrunhprof:heap=sites,depth=10,file=C:\hprof.txt".
[snip]
However no further information except the general infos were written. I
cannot force the tomcat to dump the trace file.
Are you trying to get profiling data, or are you trying to get a thread
dump?
Profiling data (-Xrunhprof:*heap*=sites, ...)
I have read that you can force to write that information if you`d start
the tomcat via console
and afterwards kill the tomcat via CTRL+C.
I think you're describing the process to get a thread dump (which is
CTRL-\, /not/ CTRL-C, which will kill your process).
Which JVM are you using? When I run "java -Xrunhprof:help" from my Sun
1.5.0 install (on Linux), it says I should be using -agentlib:hprof and
that the "Xrunhprof interface" will be removed in future versions.
Perhaps your version has Xrunhprof removed and using agentlib:hprof will
work. Try playing with this on the command-line to see what is available
at your JVM level.
What is a thread dump? I need the heap profiling information. Especially
how many object are created
of a special class.
CRTL+C ... ??? I do not know exactly the combination of that shortcut.
Generally, I don`t have any
console because there is just a windows service that has started the tomcat.
My java -version is 1.5.0.
I have also used the agentlib option. There ist no difference.
- -chris
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