问题
document on homepage says only 200,000 per database.
but what is it? how much would they charge me. hen simultaneous connection occurs 100,000? no mention for simultaneous connection on calculator.
回答1:
While there are limits to the number of simultaneous connections that are allowed to each Firebase Realtime Database instance, there is no charge for this number of concurrent connections.
Charges are only based on the amount of data stored, and the amount of data that is downloaded out of the database.
来源：https://stackoverflow.com/questions/62485357/price-for-simultaneous-database-connection-in-firebase