sh.stopBalancer()

Definition

sh.stopBalancer(timeout, interval)

Changed in version 4.2.

Disables the balancer in a sharded cluster. Starting in MongoDB 4.2, sh.stopBalancer() also disables auto-splitting for the sharded cluster.

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 balancerStop command.

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

The method can take the following options:

Parameter	Type	Description
timeout	integer	Time limit for disabling the balancer. Defaults to 60000 milliseconds. Changed in version 3.4: If using the 3.4 mongo shell with earlier version sharded clusters, the parameter specifies the amount of milliseconds to wait for the balancing round to stop.
interval	integer	The interval (in milliseconds) at which to check if the balancing round has stopped.

If you omit both options, MongoDB disables the balancer indefinitely.

Important

Leaving the balancer disabled for extended periods of time can lead to unbalanced shards, which degrade cluster performance. Only disable the balancer if necessary, and ensure that you re-enable the balancer when maintenance is complete.

You can only run sh.stopBalancer() on a mongos instance. sh.stopBalancer() errors if run on mongod instance.

The mongo shell method is a wrapper around the balancerStop command, introduced in 3.4.

Behavior

If a balancing round is in progress, the operation waits for balancing to complete.

Learn More

• sh.enableBalancing()

• sh.disableBalancing()

• sh.getBalancerState()

• sh.isBalancerRunning()

• sh.setBalancerState()

• sh.startBalancer()

• sh.waitForBalancer()

• sh.waitForBalancerOff()