I think this is the way to go indeed all that logging is not needed.

The service Actions logging is set to default where can I find the default value?

So that the module does not save the logs, this is the necessary configuration

Agree but what if I only want service actions trough the whole platform log only on troubleshoot. Can I change some where the default value?

I'm not sure if I understood your problem well, but ... below is some information regarding the  logging levels.

The available logging levels for Service Action requests are the following:

Default

All requests are logged including some basic information (like the date and time of the request). No details regarding errors, request headers or payloads are logged.

Troubleshoot

On top of the information kept by the Default level, error details are also logged. Click on the "Error" link displayed on the right to get more details about the error.

Full

On top of the information kept by the Troubleshoot level, request headers and payloads are also logged. Click on the displayed "Error" link or, if there's no error, click on the "Details" link to obtain detailed logging information.