Hi guys,
I want to learn and better understand, what the system is doing in normal operation mode and of course when it reports problems. Where can I find infos to study for the following topics, e.g. when it sends me alert emails like this:
Code
The system monitoring needs your attention.
Host: OpenMediaVault
Date: Mon, 24 Oct 2022 07:17:17
Service: OpenMediaVault
Event: Resource limit matched
Description: loadavg (5min) of 4.5 matches resource limit [loadavg (5min) > 4.0]
This triggered the monitoring system to: alert
—
You have received this notification because you have enabled the system monitoring on this host.
To change your notification preferences, please go to the 'System | Notification' or 'System | Monitoring' page in the web interface.Code
The system monitoring needs your attention.
Host: OpenMediaVault
Date: Mon, 24 Oct 2022 07:31:19
Service: OpenMediaVault
Event: Resource limit succeeded
Description: loadavg (5min) check succeeded [current loadavg (5min) = 4.0]
This triggered the monitoring system to: alert
—
You have received this notification because you have enabled the system monitoring on this host.
To change your notification preferences, please go to the 'System | Notification' or 'System | Monitoring' page in the web interface.I want to learn, how to read the process diagnosis.
How do I read parameters like "load average: 0.34, 0.41, 0,50" - does that refer to percentage?
How to read the %CPU figures?
How to read and understand the MiB figures?
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top - 10:21:39 up 21 days, 14:48, 0 users, load average: 0.34, 0.41, 0.50
Tasks: 222 total, 2 running, 215 sleeping, 0 stopped, 5 zombie
%Cpu(s): 3.9 us, 7.8 sy, 0.0 ni, 85.7 id, 0.0 wa, 0.0 hi, 2.6 si, 0.0 st
MiB Mem : 7613.9 total, 582.3 free, 3419.5 used, 3612.1 buff/cache
MiB Swap: 7844.0 total, 7091.0 free, 753.0 used. 3754.8 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
165935 root 20 0 2714480 445652 4904 S 18.8 5.7 11295:24 python3
165936 root 20 0 1365064 179364 3812 S 12.5 2.3 1988:03 python3
1358842 root 20 0 12048 3880 3256 R 12.5 0.0 0:00.03 top
2779 root 20 0 5213380 917412 8944 S 6.2 11.8 6122:14 dotnet
165930 root 20 0 132252 55076 908 R 6.2 0.7 1715:01 redis-s+
1 root 20 0 165848 8484 4856 S 0.0 0.1 54:37.29 systemd
--- snipThanks a lot in advance for pointing me to good source(s), where I can read myself in 
Cheers!
