If I omit the -Xmxn
option from the Java command line then a default value will be used. According to Java documentation
“the default value is chosen at runtime based on system configuration”
What system configuration settings influence the default value?
10 s
On Windows, you can use the following command to find out the defaults on the system where your applications runs.
java -XX:+PrintFlagsFinal -version | findstr HeapSize
Look for the options MaxHeapSize
(for -Xmx
) and InitialHeapSize
for -Xms
.
On a Unix/Linux system, you can do
java -XX:+PrintFlagsFinal -version | grep HeapSize
I believe the resulting output is in bytes.