db.collection.dataSize()
db.collection.dataSize()
Important
mongosh Method
This page documents a
mongosh
method. This is not the documentation for database commands or language-specific drivers, such as Node.js.For the database command, see the
size
field returned by thecollStats
command.For MongoDB API drivers, refer to the language-specific MongoDB driver documentation.
Returns: The size in bytes of the collection. Data compression
does not affect this value.To run on a replica set member,
collStats
operations require the member to be inPRIMARY
orSECONDARY
state. If the member is in another state, such asSTARTUP2
, the operation errors.