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Asked: 2026-05-16T06:05:39+00:00

What is the minimum memory requirement to start JVM? I have the cheapest VPS

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What is the minimum memory requirement to start JVM?
I have the cheapest VPS Burstnet (512mb memory) and installed java.
When I type java, it says

$java
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.

When I type top, there is still around around 400MB free memory.

The support tells me the only solution is to increase my memory, I doubt his suggestion. In case it is caused by insufficient memory,I tried to create a swap file, however swap file is not allowed due to my VPS runs on OpenVS, and OpenVs does not allow swap files. http://writereadspread.blogspot.com/2010/08/swap-on-vpsopenvs.html

I would be very much appreciated if you can answer any of the following questions:

What is the cause of the issue?
What is the minimum memory requirement for installing JRE and JDK?
If u r running java apps on VPS, what is your memory, and which host r u using?

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1 Answer

  1. Editorial Team

    To run Tomcat on VPS:
    * if openjkd installed, uninstall
    * install sun-java linux installation
    * install tomcat
    * run export JAVA_OPTS="-XX:MaxPermSize=64m -Xms16M -Xmx64m"
    * start Tomcat ./startup.sh

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