Cluster Level Locks
Only one cluster level lock can be taken at a time.
If a cluster level lock is taken, it will block any database locks from being taken.
DML operations are not affected by these locks.
DDL operations that are affected by these locks are listed in Operations that Take Cluster Level Locks
Any blocked operations will queue.
Example: ADD LEAF
is running on the cluster. While the operation is running, CREATE TABLE
tries to run, but is blocked until ADD LEAF
completes.