Hello itababa,
It appears to me that you are quite new to checkmk. Please always consult the documentation before posting here.
Beside that there are a plenty of good blog posts:
Also have a look at the knowledge base:
You find also a plenty of good videos in youtube.
It would be beneficial to have one thread per problem. Answering three problem’s in one thread could cause confusions.
We monitor a couple of SAP HANA servers since quite a while and I am not aware of any issues.
Referring to your 1st problem.
I am personally not a SAP HANA expert, my domain is monitoring only.
For the moment I dont get it what it is about.
My first question is what is the service/check name?
If its about SAP HANA Events, the state of the service should change as soon as the event is cleared in SAP HANA.
An agent output might help after its known what check it is about.
regards
Mike