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I'm using IDEA 12 Leda on Mountain Lion. I wanted to increase the maximum memory that IDE can use. I set the VMOptions in Info.plist file to be -Xmx2048m -ea -XX:+HeapDumpOnOutOfMemoryError -Xverify:none -Xbootclasspath/a:../lib/boot.jar
When I open up IDEA, I still see the maximum memory to be 711m.
jps -v shows my VMOptions has been loaded but it's replaced by the following options.
29388 **-Xmx2048m** -ea -XX:+HeapDumpOnOutOfMemoryError -Xverify:none -Xbootclasspath/a:../lib/boot.jar -Xms128m **-Xmx800m** -XX:MaxPermSize=350m -XX:ReservedCodeCacheSize=64m -XX:+UseCodeCacheFlushing -XX:+UseCompressedOops -Didea.paths.selector=IdeaIC12 -Dsun.java2d.noddraw=true -Didea.max.intellisense.filesize=2500 -Didea.dynamic.classpath=false -Didea.jars.nocopy=false -Dsun.java2d.d3d=false -Dapple.awt.fullscreencapturealldisplays=false -Dapple.laf.useScreenMenuBar=true -Djava.endorsed.dirs= -Dswing.bufferPerWindow=false -Didea.fatal.error.notification=enabled -Didea.cycle.buffer.size=1024 -Didea.popup.weight=heavy -Didea.xdebug.key=-Xdebug -Dapple.awt.graphics.UseQuartz=true -Dsun.java2d.pmoffscreen=false -Didea.no.launcher=false -DCVS_PASSFILE=~/.cvspass -Didea.use.default.antialiasing.in.editor=false -Dcom.apple.mrj.application.live-resize=false -Didea.smooth.progress=false 29392 Jps -Dapplication.home=/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home -Xms8m Where does -Xmx800 come from? I need to remove it.
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Intellij Idea consumes all 8GB memory allocated for it after upgrading to 2021.1. Intellij Idea consumes all 8GB memory allocated for it after upgrading to 2021.1.
Common options Limits the maximum memory heap size that the JVM can allocate for running IntelliJ IDEA. The default value depends on the platform. If you are experiencing slowdowns, you may want to increase this value, for example, to set the value to 2048 megabytes, change this option to -Xmx2048m .
64 bit JVM installed on Solaris machines runs with a 32-bit model if you don't specify either -d32 or -d64, which won't accept a Maximum heap size of 4GB, hence "invalid heap size". You can resolve this issue by running Solaris JVM with option -d64.
Limits the maximum memory heap size that the JVM can allocate for running IntelliJ IDEA. The default value depends on the platform. If you are experiencing slowdowns, you may want to increase this value, for example, to set the value to 2048 megabytes, change this option to -Xmx2048m. For more information, see Increase the memory heap of the IDE.
The default value depends on the platform. If you are experiencing slowdowns, you may want to increase this value, for example, to set the value to 2048 megabytes, change this option to -Xmx2048m. For more information, see Increase the memory heap of the IDE. Specifies the initial memory allocated by the JVM for running IntelliJ IDEA.
The following are the most commonly modified ones: Limits the maximum memory heap size that the JVM can allocate for running IntelliJ IDEA. The default value depends on the platform. If you are experiencing slowdowns, you may want to increase this value, for example, to set the value to 2048 megabytes, change this option to -Xmx2048m.
For previous versions or if the IDE crashes, you can change the value of the -Xmx option manually as described in JVM options. IntelliJ IDEA also warns you if the amount of free heap memory after a garbage collection is less than 5% of the maximum heap size: Click Configure to increase the amount of memory allocated by the JVM.
Current version: Help | Change Memory Settings:
Since IntelliJ IDEA 15.0.4 you can also use: Help | Edit Custom VM Options...:
This will automatically create a copy of the .vmoptions file in the config folder and open a dialog to edit it.
Older versions:
IntelliJ IDEA 12 is a signed application, therefore changing options in Info.plist is no longer recommended, as the signature will not match and you will get issues depending on your system security settings (app will either not run, or firewall will complain on every start, or the app will not be able to use the system keystore to save passwords).
As a result of addressing IDEA-94050 a new way to supply JVM options was introduced in IDEA 12:
Now it can take VM options from
~/Library/Preferences/<appFolder>/idea.vmoptionsand system properties from~/Library/Preferences/<appFolder>/idea.properties.
For example, to use -Xmx2048m option you should copy the original .vmoptions file from /Applications/IntelliJ IDEA.app/bin/idea.vmoptions to ~/Library/Preferences/IntelliJIdea12/idea.vmoptions, then modify the -Xmx setting.
The final file should look like:
-Xms128m -Xmx2048m -XX:MaxPermSize=350m -XX:ReservedCodeCacheSize=64m -XX:+UseCodeCacheFlushing -XX:+UseCompressedOops Copying the original file is important, as options are not added, they are replaced.
This way your custom options will be preserved between updates and application files will remain unmodified making signature checker happy.
Community Edition: ~/Library/Preferences/IdeaIC12/idea.vmoptions file is used instead.
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