https://community.cloudera.com/t5/Support-Questions/Nifi-admin-rest-api-becomes-slow-day-by-day-if-nifi-service/m-p/380021#M243982 <P><a href="https://community.cloudera.com/t5/user/viewprofilepage/user-id/37332">@hegdemahendra</a>&nbsp; &nbsp;This instability is usually a result of the cluster's tuning and/or workload greater than cluster tunning and spec can sustain for long period of time.&nbsp; &nbsp;When you restart the cluster, you are effectively resetting the memory allocation.&nbsp; &nbsp;If you are restarting the entire nifi server(s), then you are giving a fresh operating system just like rebooting windows if its running slow.&nbsp; Things will work fine again until cross the fine line between working and not working.</P><P>Before restart, and making tuning steps, you should document the state of the system when it is not responding as expected.&nbsp; What is the load on each node?&nbsp; What is the used/vs available memory? etc.&nbsp; &nbsp;Next you should investigate Garbage Collection.</P> Fri, 01 Dec 2023 14:01:08 GMT steven-matison 2023-12-01T14:01:08Z