EOS (qdb) log level

On a fresh 5.4.7 test installation, the log of the QDB is flooded by
```
260624 18:34:13 time=1782318853.561605 INFO: During the last 10 seconds, I serviced 0 reads (0 Hz), and 4 writes (0 Hz) over 4 write transactions
```
This is correct, there was no activity whatsoever, but I didn’t want to be reminded about it every 10 sec.
I have search for log level and debug options, also running grep in every conceivable directory, but did not find anything.
Obviously, a log level like “Warning” would be sufficient - but how?

Cheers

Thomas