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.
The total size of all indexes for the collection.
If an index uses prefix compression (which is the
default for WiredTiger), the returned size
reflects the compressed size.
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 can also be run when the member
is in STARTUP2. However, the operations wait
until the member transitions to RECOVERING.