# Operations that Take Cluster Level Locks

The following operations take cluster level locks:

* `ADD AGGREGATOR`
* `ADD LEAF`
* `AGGREGATOR SET AS MASTER`
* `ATTACH LEAF`
* `ATTACH LEAF ALL`
* `BOOTSTRAP AGGREGATOR`
* `CHECK BLOB CHECKSUM`
* `CLEAR ORPHAN DATABASES`
* `CONTINUE REPLICATING`
* `CREATE USER`
* `DETACH LEAF`
* `GRANT`
* `PAUSE REPLICATING`
* `REBALANCE ALL DATABASES`
* `REMOVE AGGREGATOR`
* `REMOVE LEAF`
* `REPLICATE DATABASE`
* `REVOKE`
* `STOP REPLICATING`

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Modified at: October 24, 2022

Source: [/db/v9.1/reference/sql-reference/operations-that-take-either-a-database-or-a-cluster-level-lock/operations-that-take-cluster-level-locks/](https://docs.singlestore.com/db/v9.1/reference/sql-reference/operations-that-take-either-a-database-or-a-cluster-level-lock/operations-that-take-cluster-level-locks/)

(An index of the documentation is available at /llms.txt)