GRR_Server log size increases very fast

**Environment**
- How did you install GRR?
From DEB
- What GRR version are you running?:
3.4.2.4
- What operating system does the GRR server run on?
Ubuntu 20.04
- What operating system does the affected GRR client run on, if applicable?
N/A

**Describe the issue**
These two logs are growing at an incredible speed:

- /var/log/syslog
- /usr/share/grr-server/lib/python3.6/site-packages/grr_response_core/var/log/grr-worker.log

In a few hours more than 40GB are generated.
Is it possible to adjust the verbosity? Is it necessary for the same error (such as access to the DB) to generate an error log every millisecond?