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wrapper.java.additional.4=-XX:MaxPermSize=128m
# Initial Java Heap Size (in MB)
wrapper.java.initmemory=32
# Maximum Java Heap Size (in MB)
wrapper.java.maxmemory=2561280

java -Djava.awt.headless=true -Xmx256mXmx1280m -Xms64m -XX:MaxPermSize=128m .....

When specifying the -Xmx and -Xms values, the following needs to be taken into account:

• The value can only be an integer value
• The value needs to be places directly behind the parameter, no spaces or equal signs
• The value needs to be post fixed with the unit: "m" or "M" for megabytes, "g" or "G" for gigabytes
• When changing the -Xms options,  make sure that the -Xmx option has a higher value
• Both values need to be lower than the available memory on the machine

By default the servoy server start files (wrapper or sh/batch) files will have the maximum configures of 1280m, it could be that this is to high for small servers, and you get this errror: "Error occurred during initialization of VM
Could not reserve enough space for object heap
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit."
By default the servoy server start files (wrapper or sh/batch) files will have the maximum configures of 1280m, it could be that this is to high for small servers, and you get this errror:

"Error occurred during initialization of VM
Could not reserve enough space for object heap
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit."

please lower then the Xmx value to something your server can handle.