OH3 reacting slow on every client

Hi folks,

since some months I am encountering a very slow reaction of my openHAB instance.
I don’t know when this started, but definitively with a 3.x version.

My setup is:

  • Platform information:
    • Hardware: RaspberryPi 3 B+
    • OS: latest openHABian image / Raspbian
    • Java Runtime Environment: 11.0.18
    • openHAB version: 3.4.1 release build
    • openHAB items #: ~650 items
    • openHAB things #: ~73 things
    • openHAB rules #: ~52 rules (2-3 of them running every 2-5 seconds)
  • Clients:
    • iPhone 11 with Safari (latest updates)
    • Windows 11 with Edge or Firefox (latest updates)

I selected one example for this thread, which is the most annoying thing:
When browsing to the Items administration in the settings, it takes sometimes up to 2 min to load the list. I recorded this also with the dev tools of Edge:

But also the loading of pages is slow - or the loading of the values on these pages is slow.
Also the editing of widgets is a pain, because the lists don’t get filled in time - or even take long.

What I am wondering is, why does the transmission to the client takes that long?
I don’t think that the Pi is to weak to run openHAB 3.x

I also exchanged the SD cards to check if it is coming from there…

Does anybody has an idea where I can start looking for a “root cause”?

Thanks and Cheers!

Had a very similar problem. In the end I had to do a fresh install and restore from backup. Did not take that much time, even though I would have preferred to find the root cause.