问题 This question already has answers here : Document Updates - Do updates with no changes still cost 1 write? (2 answers) Closed last month . Im trying to find out how firebase is billing write operations. In the billings documentation I could not find a clear definition of when a write is counted. Lets say I run a set query with the exact same data of the original documen, such that the document won't be affected, will this be billed as a write operation? When I run my query with the console