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Posted to dev@nifi.apache.org by Bobby <bo...@gmail.com> on 2018/10/11 04:34:56 UTC

Nifi very high cpu and memory utilization

Hi, i have a very very big and complex messaging system built in Nifi 1.7.1,
the issues are as follows:

Using visualvm i got this result
<http://apache-nifi-developer-list.39713.n7.nabble.com/file/t921/visualvm_monitor.png> 

Using top i got this result
<http://apache-nifi-developer-list.39713.n7.nabble.com/file/t921/top_monitor.png> 

Heap allocated 16 - 24 GB

Now, my questions are:
1. Why in visualvm CPU utilization shows very high (touching 100%) and in
top it never exceeds 50 - 60%???
2. Why Nifi keep 80% memory in Top while in theory it should only reserve
maximum "touched" heap (in my case 20GB)??


Thank you





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Bobby
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