Setting -XX:MaxRam

Question

According to this link, there is an option to set MaxRamSize manually to restrict the JVM to not use memory beyond this. But I have not seen any documentation of the same. I

Answer 1

I found the reference

https://chriswhocodes.com/hotspot_options_jdk11.html?s=MaxRam

But as Stephen C suggests it is probably just the B

NOTE: This is the maximum RAM size used to calculate the default Heap and Direct memory maximum. It doesn't provide a greater enforcement.

Real memory size (in bytes) used to set maximum heap size

and for another parameter

Maximum ergonomically set heap size (in bytes); [the default] zero means use MaxRAM * MaxRAMPercentage / 100

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In the Oracle/OpenJDK there is no obvious option.

$ java -version -XX:+PrintFlagsFinal | grep -i MaxRAM

However, on Linux you can set the maximum memory size with ulimit however this will hard crash the JVM if reached.