Any parameter for controlling log level?

[abhijith-db]

Hi,
After a recent version upgrade the verbosity of the logs increased significantly (seems due to #110), and so did the memory usage. Is there any parameter or envvar to control the log level? Or maybe the detailed logs in #110 could be at debug level?
Maybe reading the app log level from an envvar and passing to zap?

[abhijith-db]

Also, would it be more appropriate to make the logs added at #110 be at debug level perhaps?