I would like to understand which applications load the processor, whether it is enough.There is an impression that with a large number of simultaneous visitors the site doesn’t have enough processor power, but I don’t want to judge this by top/htop monitors.
I would like some kind of demon that writes logs of what kind of process the processor is loading, and then it produces a kind of summary image.

2 Answers 2

from minimalistic - atop - is similar to top but keeps a log which you can see later,
if something with graphs and web interface - look at munin, zabbix, prometheus + grafana
nagios, zabbix