In my dev clusters, there are 2 NodeManagers. It is crashing often for the past few weeks because of memory issues and tried to increase heap size for Node Manager process as temporary workaround (from 512 MB to 6 GB as of now). Before 2 days, it couldn't even able to start with 4 GB after crash and it worked after increasing it to 6 GB. Below graph took from CM showing the heap usage across node (jvm_heap_used_mb_across_nodemanagers metric).
Can you help me in this regard?