CPU load unexpectedly high after update

[Becker]

Hi, today I´ve updated my RPi4, RPi2 (friend), Ubuntu VM.

On both Pi the CPU load is now unexpectedly high from Node-Red.

before, the load always stays at the red line:

at my friends Pi:

we have nothing changed in Node-Red !
just update/dist-upgrade.

any idea where to debug?

I tried on a 3rd RPi (without update today):

It has just updated nodejs:
Entpacken von nodejs (18.17.1-deb-1nodesource1) über (18.17.0-deb-1nodesource1) ...
nodejs (18.17.1-deb-1nodesource1) wird eingerichtet

but here it is inconspicuous after the update:

only slightly increased

[Colin]

It isn't clear what the lines on the chart are, and what has changed on the graph between before and after.

Have you looked to see what is consuming the CPU?

[jbudd]

What was your aim in running sudo apt dist-upgrade?

[Colin]

It is a good idea to keep systems up to date, particularly if they have access to the internet. Packages can have security updates applied and those should be picked up.

[jbudd]

That's not the normally recommended command to update a Raspberry Pi though, hence my question.

[Colin]

Oh I see, yes the modern command is sudo apt full-upgrade but the old style still works sudo apt-get dist-upgrade and for compatibility that has also been added to apt as sudo apt dist-upgrade. They all do the same thing as I understand it.

[Becker]

can I see within the process node-red, who is causing the high load?

the both RPi who has the high load use modbus contrib - the 3rd RPi who has no higher load today, hasn´t the modbus contrib.

[Becker]

I found the cause: Grafana Update.

I was the only one today.

Well wrong forum, thanks anyway.