Josef Zahner commented on NIFI-4905:

Puh,have to check if I'm allowed to share the flow.xml.gz. But I guess it isn't 
possible. Will check that on monday.

Yes of course we have custom processors. Regarding the list of processors. Is 
there an easy way to export them? NiFi Summary - General, shows them, but copy 
doesn't work well.

> Cluster response time is slow
> -----------------------------
>                 Key: NIFI-4905
>                 URL: https://issues.apache.org/jira/browse/NIFI-4905
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Core UI
>    Affects Versions: 1.5.0
>         Environment: Centos 7.3
> NiFi 1.5.0 Cluster with 8 physical nodes
>            Reporter: Josef Zahner
>            Priority: Major
>         Attachments: cpu_load_nifi.PNG, root_canvas.png
> we are actually working on a PoC with 8 nodes (HP BL460c Blades, 24 Cores, 
> 44GB RAM) in a NiFi 1.5.0 cluster. Our configuration has about 160 processors 
> and all of them are stopped. Even in the stopped state, we are constantly 
> getting the messages below for all nodes, not only for the primary node.
> {code:java}
> Response time from nifi2-07.xyz.ch:8080 was slow for each of the last 3 
> requests made. To see more information about timing, enable DEBUG logging for 
> org.apache.nifi.cluster.coordination.http.replication.ThreadPoolRequestReplicator
> {code}
> If you are on the root canvas, you feel that it takes a few seconds until it 
> response after a refresh. We have already tuned the parameters below, but 
> without any luck. After restart of NiFi it is fine for a few minutes, but 
> then the messages return.
> {code:java}
> nifi.cluster.protocol.heartbeat.interval=15 sec
> nifi.cluster.node.protocol.threads=40
> nifi.cluster.node.protocol.max.threads=80
> nifi.cluster.node.connection.timeout=60 sec
> nifi.cluster.node.read.timeout=60 sec
> {code}
> The nodes have absolutely no load beside of NiFi. What surprised me was, that 
> when the UI refreshs (default every 30s) it produces about 20% cpu load on my 
> machine. And remember, it's a 24x2.9GHz blade server.
> !cpu_load_nifi.PNG!
> That's a picture of my root canvas:
> !root_canvas.png!
> Actually we can't work with the cluster under this circumstances because the 
> gui always gets so slow.
> Is this a bug or normal behavior? Do we have to many elements on the GUI or 
> what could cause this issue?
> Cheers

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