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Sun, 10 May 2009 11:25  |
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Registered: May 2009
Messages: 21
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Hello there,
I just found the solution to my problem running Java on Village and Town VPSs (with openSUSE 11.0) due to the large amounts of memory required by the JVM. Now I want to share with others what I found.
The problem happens whn you try to run java and get the following error:
# java
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.
In order to run almost ANY java-powered program when you have low memory, you can replace the java executable with a wrapper that adds the -Xmx option to the real executable. This is how to do that:
*Find the java executable
*Rename java to something else
*Create a bash script that runs the real java executable with -Xmx parameter and the original parameters supplied by the caller
Here are the commands to run as root:
# cd $JAVA_HOME/bin
# mv java xmjava
# touch java
# chmod +x java
# nano java
You can use nano, vi or ANY other editor you like. When in the editor, paste the following code:
#!/bin/bash
./xmjava -Xmx16m "$@"
Replace the "16m" with the amount of megabytes you like, for example "32m", "128m" etc.
To check if it works, try to run "java -version". Here is what it did on my VPS:
marcus:/usr/bin # java -version
java version "1.6.0_0"
IcedTea6 1.4 (suse-24.4-i386) Runtime Environment (build 1.6.0_0-b14)
OpenJDK Client VM (build 14.0-b08, mixed mode)
So it works now 
Remember!!! Java is very memory-consuming!! Don't expect all the programs to run fine. If you have a huge Java DBMS process to execute, never expect it to work unless you buy a large VPS. Java will work fine for console scripts, or awt applications if you enabled X11 Tunnelling in SSH.
Again: don't expect taht EVERYTHING will run. You may still wish to try mono................
Thanks to VPSVille support for helping me in my research.
[Updated on: Sun, 10 May 2009 12:32]
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Mon, 03 January 2011 22:14  |
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Registered: January 2011
Messages: 1
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no more working on village vps?
16m - Ubuntu 9.04
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.
I think is not possible to start a jvm!!
free -m:
total used free shared buffers cached
Mem: 64 64 0 0 0 0
-/+ buffers/cache: 64 0
Swap: 0 0 0
[Updated on: Mon, 03 January 2011 22:15]
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Thu, 06 January 2011 14:31 |
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Registered: November 2007
Messages: 512
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You need to set the heap on the command line to run Java in a low memory environment. See the above instructions or consult your Java docs.
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