Stopping, resuming, or restarting a cluster

You can stop, resume, or restart a ClickHouse® cluster by clicking the appropriate menu item. As you would expect, the text of the first menu item is Stop if the cluster is running and Resume if the cluster is stopped. Depending on the size of your cluster, it may take a few minutes until it is fully stopped, resumed, or restarted.

You’ll see this confirmation dialog when you stop a cluster:

Figure 1 - The Stop Cluster confirmation dialog

Be aware that if your cluster’s activity schedule is set to STOP ON SCHEDULE or RESCALE ON SCHEDULE, stopping it resets its activity schedule to ALWAYS ON. You’ll be asked to acknowledge the consequences of stopping the cluster:

Figure 2 - Acknowledging the consequences of stopping a cluster

See the page Configuring Activity Schedules for all the details, or click the check settings link in the dialog to see the cluster’s current activity schedule.

If you are resuming a cluster, you can change the node type used in the cluster:

Figure 3 - The Resume Cluster confirmation dialog

If you are restarting a cluster, you have the option of doing a Hard Cluster Reset, which kills all of the ClickHouse cluster’s Kubernetes pods before restarting the cluster:

Figure 4 - The Cluster Restart confirmation dialog

Finally, be aware that a cluster may be stopped, resumed, or rescaled automatically based on any activity schedules you may have configured.