Solved: Rules: First time slow execution, after some use: fast?

[LarsK]

@CeeCee

I can think of such a rule at system start. But: When I recap the post of LarsK, it seems that all those classes are unloaded at some point, since after some time (>30 minutes perhaps) the same effect takes place.

Well.
This sounds like the issue I had as well. The java environment seems to keep the memory usage per application to something around 20%. I guess to make sure other java application do have enough free memory as well.
But as in my case openHAB is the only java application permanently running, there is no reason to keep the usage so low…

Look here where I tried to explain my finding (on my Raspi 2)

Raspberry Pi: Before I Pull the Trigger?

I have a huge openHAB environment running on a Raspi PI 2 as well. No performance issue here at all. There is just one thing that should be considered when it comes to devices with limit memory (1GB in case of the Pi2) and the usage of a Java application like openHAB… Garbage collection. It seems the Java runtime normally gives each running java process a limit of maximum memory used and a much lower threshold on how small it can/should become in the memory. This means every information alloca…