Redis is an open source, key-value database built with an in-memory design that emphasizes speed. It has support for rich data types, atomic operations, and Lua scripting.
You can resize existing Redis database clusters at any time to add more CPUs, RAM, and storage. To avoid data loss, you cannot decrease the size of database clusters.
To resize a Redis database cluster, click the name of the cluster in the control panel to go to its Overview page, then click the Settings tab.
In the Cluster configuration section, click the Edit button. Select the MACHINE TYPE, NODE PLAN, and the number of STANDBY NODES (optional) for your configuration.
Once you have selected your new configuration, click Save to provision the new configuration. The provisioning takes several minutes but the total time depends on the size of the cluster.
Your cluster’s state changes from Active to Resizing until the process is done. You can expect no downtime and do not need to take action.