RFR: 8231563: ZGC: Fails to warn when user sets the max heap size to larger than 16TB

Stefan Karlsson stefan.karlsson at oracle.com
Fri Sep 27 07:16:24 UTC 2019

Hi all,

Please review this small patch to fix the max heap size check in ZGC.


After this fix the JVM refuses to start if a too high -Xmx is set:

$ java -XX:+UnlockExperimentalVMOptions -XX:+UseZGC -Xmx17t -version:
Error occurred during initialization of VM
Java heap too large


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