sysstat VS s-tui

Well... What that's showing is that at some point in time you copied some pages into swap. Since there's no competition for that, they have just stayed there. It doesn't mean that you are seeing memory pressure now, only that at some point since the last reboot your memory usage passed the high water mark which encouraged the kernel to start thinking about swap. If you have sysstat installed you can run through sar to see when that was and even get some idea of whether or not any of those pages written to swap were ever read again, but just having some pages written to swap doesn't mean a whole lot on its own.

You can try sysstat/ iostat. https://github.com/sysstat/sysstat Have a cron or systemd process take periodic snapshots and log them or email them. The swordfish on paper looks fast enough, but it’s on the slow side for a NVMe. For reference I’m running a NUC8 i5 with 16GB of RAM, 1 TB Adata XPG SX8200 Pro and it’s been rock solid. Ubuntu 20.04LTS.

There's a way of doing it via s-tui.

I meet this weird situation after switch my laptop to archlinux from windows these days: the system cooling fan didn't spin at all when using s-tui stress Mode, even the core tempreture was up to 90 celsius shown by zenmonitor, but the fan acts normal in daily use. Can someone explan me why it could happen? the principles beind it is much more welcome!

One good, relevant monitoring tool is s-tui.

s-tui is useful for CPU frequency, temperature, and TDP monitoring (make sure to run it with sudo for power details). It also has a nice stress test.

For the CPU I can recommend s-tui which is basically a GUI for stress. You could of course also just run stress without a GUI

Dual Heat-pipe I'll keep this short the only answer to thermal throttling is undervolting your cpu! If you're actually curious to the impact it had keep reading. For the stress tests I use s-tui .

s-tui could give you more clues on what is happening with your system. If the in-built power profiles don't work, you could try throttled.