Does the Max Series Configuration work?

Hi all! I’m trying to play with some non-telegraf monitoring data we have. I need to extend the max series per database config, but setting to zero doesn’t seem to work (i.e., extend past 1M series). I have alot of writes to do, but query speed isn’t so important. Running in AWS on an r-class machine with healthy memory and attached SSD.

Does anyone have experience extending the max series they can share?