If you don't specify anything with -Xmx and -Xms, how much memory
will the operating system allocate to your Java process?
The default heap size was 64MB until Java 5. Since then, it's been calculated runtime. To see what the JVM will pick for your system, you can do:
$ java -XX:+PrintFlagsFinal -version 2>/dev/null |
grep InitialHeapSize |
awk '{print $4}' |
numfmt --to iec
498M
To read more about how this value is calculated, see Garbage Collector Ergonomics
