clarification regarding SoftMaxHeapSize and AlwaysPreTouch

[Alen Vrečko]

Hello,

saw this write up https://malloc.se/blog/zgc-softmaxheapsize. I have a
question regarding AlwaysPreTouch. I could have missed it in the
documentation and write up. But I am wondering:

Doing -XX:SoftMaxHeapSize=2G -Xmx5G -XX:+AlwaysPreTouch

will this first commit 5G of native memory on start and then ZGC will
ZUncommit 3G? Alternative is to only pretouch up to 2G?

With -XX:SoftMaxHeapSize=2G -Xmx5G -XX:+AlwaysPreTouch -XX:-ZUncommit does
this mean the heap will take 5G of native memory from the start and stay
that way?

Thanks
Alen
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