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Special Forums UNIX and Linux Applications Infrastructure Monitoring Using Node-RED and MQTT to Monitor Server and Application Stats Post 303043733 by Neo on Wednesday 5th of February 2020 07:28:19 AM
Old 02-05-2020
Well, those changes did not help much.... looks like here is some "underground" process running every three hours causing the spikes:

Using Node-RED and MQTT to Monitor Server and Application Stats-screen-shot-2020-02-05-72457-pmjpg


I checked all the forum software and all the cron files on the server, but so far, no joy in finding the process causing the intermittent performance hit.
 

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CALENDARSERVER_MONITOR_NOTIFICATIONS(8) 		    BSD System Manager's Manual 		   CALENDARSERVER_MONITOR_NOTIFICATIONS(8)

NAME
calendarserver_monitor_notifications -- Darwin Calendar Server push notification monitor SYNOPSIS
calendarserver_monitor_notifications [--admin username] [--config file] [--host hostname] [--node pubsub-node-name] [--port port-number] [--ssl] [--verbose] [--help] username DESCRIPTION
calendarserver_monitor_notifications is a tool for making sure XMPP push notifications are working properly. Given a username and password it will connect to the calendar server and determine which pubsub node(s) correspond to that user's calendar home, as well as those of any user which has delegated calendar access. Next it will subscribe to those nodes and await notifications, printing them to stdout. An admin- istrator can monitor the push notifications for another user by passing the --admin option. Exit by hitting Control-C. OPTIONS
-a, --admin Authenticate using the credentials of the given administrator. -h, --help Display usage information. -f, --config FILE Use the Calendar Server configuration specified in the given file. Defaults to /etc/caldavd/caldavd.plist. -H, --host HOSTNAME Connect to the specified calendar server. If not passed on the command line, the host name is looked up in the configuration file. -n, --node NODENAME Bypass the auto-discovery of pubsub nodes and specify one explicitly. Useful on calendar servers which don't support the push-trans- ports DAV property. When using this option, the host and port options instead refer to the XMPP server host and port numbers. -p, --port NUMBER Connect to the specified port number. If not passed on the command line, the port number is looked up in the configuration file. -s, --ssl Use https to connect to calendar server (default is http). -v, --verbose Print debugging information. FILES
/etc/caldavd/caldavd.plist The Calendar Server configuration file. SEE ALSO
caldavd(8) BSD
Feb 3, 2011 BSD
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