Am I doing something wrong or is openhab2 on a raspi super slow

Hey guys

same here, my setup is super slow as well (RPi3, latest version ob openHabian and OH2.1, 3 bindings (KNX, Hue, Zwave) installed, 1 persistence service (mysql).

Some examples (rough measures, just counting seconds):

  • opening Paper UI: up to 10 seconds
  • opening habmin: up to 120 seconds, any click there at least 5 seconds
  • opening classic UI: 5 seconds
  • click in classic UI to go to sub-section: 2-3 seconds
  • basic UI: charts loading takes up to 60min, sometimes I lost patience to wait…

Top:
Tasks: 127 total, 1 running, 126 sleeping, 0 stopped, 0 zombie
%Cpu(s): 2.7 us, 0.3 sy, 0.0 ni, 96.8 id, 0.1 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem: 994232 total, 609764 used, 384468 free, 31672 buffers
KiB Swap: 102396 total, 0 used, 102396 free. 168456 cached Mem

openjdk version "1.8.0_121"
OpenJDK Runtime Environment (Zulu Embedded 8.20.0.42-linux-aarch32hf) (build 1.8.0_121-b42)
OpenJDK Client VM (Zulu Embedded 8.20.0.42-linux-aarch32hf) (build 25.121-b42, mixed mode, Evaluation)

What is wrong here? Any ideas how I can improve?