It's a function of the number of keys more than heap size directly. I've benchmarked the STW at 20ms pauses for ~2G if the values are ~10k each, and 200ms if th

It's a function of the number of keys more than heap size directly. I've benchmarked the STW at 20ms pauses for ~2G if the values are ~10k each, and 200ms if the keys are 1K each at the same amount of RAM.