[eclipse] Increase JVM max heap size for Eclipse

I am trying to increase the max heap size for my Eclipse. I have tried specifying in eclipse.ini or through the command line, but are not working.

My max heap size has the exact same limit before (running jconsole) and after (System.out.println(java.lang.Runtime.getRuntime().maxMemory());) starting Eclipse. 1.8G

  1. Is there any way to modify JVM heap size before it is launched (ex. a config file?)
  2. What could I be doing wrong when specifying heap size to Eclipse?

This is the command:

./eclipse/eclipse -debug -consoleLog -vmargs -Xms1000m -Xmx6000m -XX:-UseGCOverheadLimitcl

This is my eclipse.ini (which values are overwritten by the specified eclipse launching parameters):

-startup
plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.gtk.linux.x86_64_1.1.200.v20120522-1813
-product
org.eclipse.epp.package.java.product
--launcher.defaultAction
openFile
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
256m
--launcher.defaultAction
openFile
-vmargs
-Dosgi.requiredJavaVersion=1.6
-Dhelp.lucene.tokenizer=standard
-XX:MaxPermSize=6000m
-Xms1000m
-Xmx6000m

This question is related to eclipse jvm heap

The answer is


It is possible to increase heap size allocated by the Java Virtual Machine (JVM) by using command line options.

-Xms<size>        set initial Java heap size
-Xmx<size>        set maximum Java heap size
-Xss<size>        set java thread stack size

If you are using the tomcat server, you can change the heap size by going to Eclipse/Run/Run Configuration and select Apache Tomcat/your_server_name/Arguments and under VM arguments section use the following:

-XX:MaxPermSize=256m
-Xms256m -Xmx512M

If you are not using any server, you can type the following on the command line before you run your code:

java -Xms64m -Xmx256m HelloWorld

More information on increasing the heap size can be found here


You can use this configuration:

-startup
plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.gtk.linux.x86_64_1.1.200.v20120913-144807
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
256m
--launcher.defaultAction
openFile
-vmargs
-Xms512m
-Xmx1024m
-XX:+UseParallelGC
-XX:PermSize=256M
-XX:MaxPermSize=512M

Try to modify the eclipse.ini so that both Xms and Xmx are of the same value:

-Xms6000m
-Xmx6000m

This should force the Eclipse's VM to allocate 6GB of heap right from the beginning.

But be careful about either using the eclipse.ini or the command-line ./eclipse/eclipse -vmargs .... It should work in both cases but pick one and try to stick with it.


--launcher.XXMaxPermSize

256m

Try to bump that value up!


Examples related to eclipse

How do I get the command-line for an Eclipse run configuration? My eclipse won't open, i download the bundle pack it keeps saying error log strange error in my Animation Drawable How to uninstall Eclipse? How to resolve Unable to load authentication plugin 'caching_sha2_password' issue Class has been compiled by a more recent version of the Java Environment Eclipse No tests found using JUnit 5 caused by NoClassDefFoundError for LauncherFactory How to downgrade Java from 9 to 8 on a MACOS. Eclipse is not running with Java 9 "The POM for ... is missing, no dependency information available" even though it exists in Maven Repository The origin server did not find a current representation for the target resource or is not willing to disclose that one exists. on deploying to tomcat

Examples related to jvm

Cannot inline bytecode built with JVM target 1.8 into bytecode that is being built with JVM target 1.6 How can I get a random number in Kotlin? Kotlin unresolved reference in IntelliJ Is JVM ARGS '-Xms1024m -Xmx2048m' still useful in Java 8? Android Gradle Could not reserve enough space for object heap Android java.exe finished with non-zero exit value 1 Android Studio Gradle project "Unable to start the daemon process /initialization of VM" Android Studio - No JVM Installation found Android Studio error: "Environment variable does not point to a valid JVM installation" Installing Android Studio, does not point to a valid JVM installation error

Examples related to heap

Android Gradle Could not reserve enough space for object heap How to increase application heap size in Eclipse? Increase JVM max heap size for Eclipse Command-line Tool to find Java Heap Size and Memory Used (Linux)? how to increase java heap memory permanently? Finding the median of an unsorted array Find running median from a stream of integers Object creation on the stack/heap? How can building a heap be O(n) time complexity? Why should C++ programmers minimize use of 'new'?