Could not reserve enough space for object heap in grails

问题

I am working on GGTS 3.5 and Grails version 2.3.7. When i run my project, we are facing an issue with Heap size.

Windows 7 32 bit; RAM: 3gb.
Java 1.7 .

I set below environment variables as well.

GRAILS_OPTS = -XX:MaxPermSize=1024m -Xmx1024m -server
JAVA_OPTS = -XX:MaxPermSize=1024m -Xmx1024m -server

and changed my GRAILS_OPTS in start grails file. But still facing the same issue.

I have just started working in java and grails, please help me out. Many thanks in advance. Error Desc:

Loading Grails 2.3.7 
Configuring classpath . 
Environment set to development ................................. 
Packaging Grails application .......................................... 
Running Grails
application Error: Could not create the Java Virtual Machine. 
Error: A fatal exception has occurred. Program will exit. 
Error occurred during initialization of VM 
Could not reserve enough space for object heap
Error | Forked Grails VM exited with error

回答1:

You may have to change memory parameters in your BuildConfig


grails.project.fork = [
    // configure settings for compilation JVM, note that if you alter the Groovy version forked compilation is required
    //  compile: [maxMemory: 256, minMemory: 64, debug: false, maxPerm: 256, daemon:true],

    // configure settings for the test-app JVM, uses the daemon by default
    test: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256, daemon:true],
    // configure settings for the run-app JVM
    run: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256, forkReserve:false],
    // configure settings for the run-war JVM
    war: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256, forkReserve:false],
    // configure settings for the Console UI JVM
    console: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256]
]

回答2:

Below approach fixed the issue for me

Inside GRAILS_HOME\bin there's a batch file named startGrails.bat

Edit the file and change the Xmx and Xms size mentioned:

set GRAILS_OPTS=-server -Xmx1024M -Xms512M -Dfile.encoding=UTF-8

restart the grails.

回答3:

Also to much (little) dynamic groovy code in grails app (inside of domain sub method) can decrease free heap size. After corrected dynamic/indirect code into local variable on each statement, a heap problem vanished.

来源：https://stackoverflow.com/questions/23560245/could-not-reserve-enough-space-for-object-heap-in-grails

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grails

heap