Thanks.
I tried already to start it nice (e.g. reniced after i noticed) it, it wont help much it is very "consuming" anyway.
As a practice i wanted to convert the bash script and insert the "sleep things" combined with watching CPU load factor, that i cant convert sa-learn i know, but maybe something could be won by making the whole thing a bit more "intelligent" .
I forgot to mention that i tried nice earlier.
Sorry if i didnt describe my goals accurately, didnt give all infos.
So i give "breathe beyond nice" a try.