Java VisualVM heap space dump into output path

Question

I need to know if it is possible to declare a output path for a heap space dump in the java visualVM. Is there any parameter that I can use for the java visual VM?

I have to trace a specific service on my server and need to get a dump of the heap space.

thanks.

UPDATE

Thanks a lot. I found a solution for my problem. I connected to my service with jmx remote. There it is possible to save the heapdump on any other drive of the server.

Answer 1

You can use the following visualvm.tmpdir system property to change the directory, where VisualVM stores snapshots, thread dumps and heap dumps. Usage:

visualvm -J-Dvisualvm.tmpdir=[custom_tmp_dir]

Answer 2

您可以更改 VisualVM 在 /etc/visualvm.conf 文件中使用的临时目录的位置，如下所示：

    visualvm_default_options=" ...  -J-Djava.io.tmpdir=<PATH> -J-Dvisualvm.tmpdir=<THE SAME PATH>"

Answer 3

For VisualVM 1.4.4 the following settings are needed in etc/visualvm.conf :

visualvm_default_userdir="<set-your-path>"
visualvm_default_options="<...> -J-Djava.io.tmpdir=<set-your-path>"

• visualvm_default_userdir sets it for jmx based heap dumps.
• visualvm_default_options sets it for process based heap dumps.