[buremba]

Java programs tend to use the memory they're given to provide the best performance in the server environments so it's not conservative in terms of memory allocation. While it does use more memory in a given time, it doesn't necessarily mean that it relies on all the allocated memory. That's one of the reasons why benchmarking is so hard..

[mapleeman]

Exactly, you are right. We were able to decrease Memory usage to 1GB in Neo4j case, but then experienced some crashes. We then just removed the limit, and let it take us much as it needs.