Free online GC log Analyzer - http://gceasy.io/

Free online thread analyzer - http://fastthread.io/ https://heaphero.io/

https://dzone.com/articles/java-memory-and-cpu-monitoring-tools-and-technique

off heap library - http://minborgsjavapot.blogspot.com/2019/07/java-chroniclemap-part-1-go-off-heap.html http://minborgsjavapot.blogspot.com/2019/07/java-chroniclemap-part-2-super-ram-maps.html http://minborgsjavapot.blogspot.com/2019/07/java-chroniclemap-part-3-fast.html