Limits
On this page
The following limits apply to Atlas.
Atlas Limits
Atlas limits the number of the following items:
Components of particular type that you can create.
Connections allowed to a cluster. For clusters, the number of connections allowed depends on the cluster tier.
Global Cluster shard keys per project. Each Atlas project supports up to 40 Global Cluster shard keys. If you require multiple Global Clusters and might exceed this limit, deploy each additional Global Cluster in a separate project.
To learn more, see Atlas Service Limits. For questions or assistance, contact support:
In Atlas, go to the Project Support page.
If it's not already displayed, select the organization that contains your desired project from the Organizations menu in the navigation bar.
If it's not already displayed, select your desired project from the Projects menu in the navigation bar.
Next to the Projects menu, expand the Options menu, then click Project Support.
The Project Support page displays.
Atlas Flex Cluster Limits
Flex clusters have certain configuration limits, operational limits, and driver requirements. To learn more, see Atlas Flex Limits.
Serverless Instance Limits
Serverless instances don't currently support all of the available Atlas features. MongoDB plans to add support for more configurations and capabilities on Serverless instances over time. To learn more, see Serverless Instance Limits.
Atlas M0 (Free Cluster), M2, and M5 Limits
Free clusters have certain configuration limits, operational limits, and driver requirements. To learn more, see Atlas M0 (Free Cluster), M2, and M5 Limits.
Commands
Not all commands are supported on all tiers, and Atlas supports some commands only on M0 Free clusters, Flex clusters, and M2/M5 Shared clusters.
Some commands have limits or are unsupported on M0 Free clusters, Flex clusters, and M2/M5 Shared clusters. To learn more about these unsupported commands, refer to Unsupported Commands in Atlas.
Some commands have limits on M10+ clusters, or are unsupported on M10+ clusters. To learn more about these commands, refer to Commands Available in Flex, M0, and M2/M5 Clusters and Serverless Instances.