Java Memory Error

[pujari]

Hi All,

greetings

I am using Centos, in that i am executing normal stand alone java programs. Some time i am getting "java.lang.outofmemory heap space" error. how to increase the heap size. I tried with the command java -Xms256m -Xmx1024m but its not working for me.Please help me.

Thanks in advance

[Rubberman]

Have you tried increasing your ulimit settings?

[hunter_thom]

Might try running jconsole from the shell and connecting to the process, to see what's eating all of the heap space.

When you say it isnt working, do you mean that Java isn't reserving the heap space according to your JVM parameters, or do you mean that you still get OOM errors?

[Foreclosure]

is magic draw one of the programs you're running?

[danny85]

Create a file named:launch.ini. with the content

# set maximum Java heap size

# maxheap=700m

# additional args to pass to Java

# java_args=-Dfoo -Dbar

# additional args to pass to Maple

# maple_args=-q

# popup dialog showing the startup command (for debugging)

# showcmd=true

# enable the Java access bridge (accessibility)

# jaccess=true

# disable directX

# java2d_nodraw=true

# set default browser

# browser="c:/Netscape"

[hunter_thom]

danny - Where would the OP put that file? You don't mention.

The OP's use of JVM parameters (java -Xms256m -Xmx1024m) is accurate for setting the minimum and maximum heap size.

If you are getting PermGen space errors, then you'd want to pass a higher PermGen space value (done by: -XX:MaxPermSize=512m with the Sun JVM), but the OP mentioned heap space, and the heap space parameters are correct.

OP - Did you modify any garbage collection settings? Have you tried connecting jconsole in order to see where all your memory is going? From within jconsole, you can also initiate a garbage collection. You may want to initiate a GC to see if the OOM errors go away or not.

[danny85]

You have to put the file where the .jar is.