André Warnier wrote:
Pid wrote:
On 26/05/2011 20:16, Caldarale, Charles R wrote:
From: André Warnier [mailto:a...@ice-sa.com] Subject: Monitoring
memory usage of JVM
I am thinking of a couple of command-line options for the JVM,
to dump for example some information each time a GC happens,
Try -verbose:gc and -Xloggc:<file_path_of_your_choice>
The jmap & jstat commands shipped with the JDK are also useful.
Thanks to both.
I'll try these out.
For now, I have used the "-verbose:gc and -Xloggc:" command-line options, and added the
jmap command into one of the other monitoring shell scripts I created.
I'll have to wait for the next GC to see the output of the switches. As the application
isn't doing anything right now, that could take a while.
But a question about "jstat" in the meantime :
In the documentation of jstat, it has this to say about the /lvmid/ part :
port
The default port for communicating with the remote server. If the hostname is omitted
or the protocol specifies an optimized, local protocol, then port is ignored. Otherwise,
treatment of the port parameter is implementation specific. For the default rmi protocol,
the port indicates the port number for the rmiregistry on the remote host. If port is
omitted, and protocol indicates rmi, then the default rmiregistry port (1099) is used.
Is this the same port which I otherwise set for jconsole, iow via the option :
-Dcom.sun.management.jmxremote.port=pppp
?
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