cursor.batchSize()

Definition

cursor.batchSize(size)

Important

mongosh Method

This is a mongosh method. This is not the documentation for Node.js or other programming language specific driver methods.

In most cases, mongosh methods work the same way as the legacy mongo shell methods. However, some legacy methods are unavailable in mongosh.

For the legacy mongo shell documentation, refer to the documentation for the corresponding MongoDB Server release:

• mongo shell v4.4

• mongo shell v4.2

• mongo shell v4.0

For MongoDB API drivers, refer to the language specific MongoDB driver documentation.

Specifies the number of documents to return in each batch of the response from the MongoDB instance. In most cases, modifying the batch size will not affect the user or the application, as mongosh and most drivers return results as if MongoDB returned a single batch.

The batchSize() method takes the following parameter:

Parameter	Type	Description
size	integer	The number of documents to return per batch. Do not use a batch size of 1.

Note

Specifying 1 or a negative number is analogous to using the limit() method.

Example

The following example sets the batch size for the results of a query (i.e. find()) to 10. The batchSize() method does not change the output in mongosh, which, by default, iterates over the first 20 documents.

db.inventory.find().batchSize(10)