Reputation: 5281

How do I provide JVM arguments to VisualVM?

I'm using VisualVM from JDK 1.6.0_26 to profile a Java webapp running under Tomcat, but VisualVM often tells me that it doesn't have enough memory to take a snapshot, and to use the -Xmx switch to provide more memory to Netbeans. The problem is, I'm running VisualVM outside of Netbeans, so how can I provide JVM arguments to jvisualvm.exe?

Upvotes: 106

Answers (6)

Hardik Modha

Reputation: 12746

Update:

As per the comment from @Kranach. New path is /Applications/VisualVM.app/Contents/Resources/visualvm/etc/visualvm.conf. In this configuration file, you can change the

visualvm_default_options="-J-client -J-Xms24m -J-Xmx256m

to(e.g.)

visualvm_default_options="-J-client -J-Xms24m -J-Xmx2048m

Old Answer: For Mac OSX 10.12+

If you have downloaded the visualvm dmg from https://visualvm.github.io/download.html and have moved it to the Applications directory. You can find the configuration file visualvm.conf under the location Applications/VisualVM.app/Contents/etc/visualvm.conf. In this configuration file, you can change the

visualvm_default_options="-J-client -J-Xms24m -J-Xmx256m

to(e.g.)

visualvm_default_options="-J-client -J-Xms24m -J-Xmx2048m

Upvotes: 2

isapir

Reputation: 23610

In VisualVM 2 the config file is in the VisualVM directory where the downloaded file was extracted, in etc/visualvm.conf

${VISUALVM}/etc/visualvm.conf

Upvotes: 2

Prabhat Jha

Reputation: 426

I started with

jvisualvm -J-Xms1024m -J-Xmx2048m

and it worked.

Upvotes: 35

aspdeepak

Reputation: 2781

In mac, you can configure them by editing this file.

/Applications/VisualVM.app/Contents/Resources/visualvm/etc/visualvm.conf

visualvm_default_options="-J-client -J-Xms4096m -J-Xmx5120m -J-XX:+IgnoreUnrecognizedVMOptions -J-Dnetbeans.accept_license_class=com.sun.tools.visualvm.modules.startup.AcceptLicense -J-Dsun.jvmstat.perdata.syncWaitMs=10000 -J-Dsun.java2d.noddraw=true"

Upvotes: 32