This page documents the mongo shell method, and does
not refer to the MongoDB Node.js driver (or any other driver)
method. For corresponding MongoDB driver API, refer to your specific
MongoDB driver documentation instead.
Starting in MongoDB 4.4, to run on a replica set member,
collStats operations require the member to be in
PRIMARY or SECONDARY state. If the member
is in another state, such as STARTUP2, the
In previous versions, the operations also run when the member
is in STARTUP2. The operations wait until the member
transitioned to RECOVERING.