Description

Neither the Oplog page nor the Glossary page define the "oplog replication window" clearly, but this is a term used in Atlas metrics etc.

I would like to see some text like:

"The oplog window is the time difference between the newest and the oldest timestamps in the oplog, and limits how far back in time an secondary node can catch up replication after being offline for maintenance or unscheduled downtime"/

Scope of changes

Impact to Other Docs

MVP (Work and Date)

Resources (Scope or Design Docs, Invision, etc.)