# Modify Cluster Attributes

Once the PostgreSQL cluster is up and running, you can customize several attributes.

## Quick Links

<table data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><mark style="color:blue;"><strong>Rename a PostgreSQL Cluster</strong></mark></td><td>Learn how to rename your PostgreSQL cluster.</td><td><a href="modify-cluster-attributes/rename-a-postgresql-cluster">rename-a-postgresql-cluster</a></td></tr><tr><td><mark style="color:blue;"><strong>Upgrade a PostgreSQL Version</strong></mark></td><td>Learn how to upgrade your PostgreSQL version.</td><td><a href="modify-cluster-attributes/upgrade-a-postgresql-cluster">upgrade-a-postgresql-cluster</a></td></tr><tr><td><mark style="color:blue;"><strong>Update PostgreSQL Replication Mode</strong></mark></td><td>Learn how to update the replication mode of the PostgreSQL cluster.</td><td><a href="modify-cluster-attributes/update-postgresql-replication-mode">update-postgresql-replication-mode</a></td></tr><tr><td><mark style="color:blue;"><strong>Increase a PostgreSQL Cluster Storage Size</strong></mark></td><td>Learn how to increase the your PostgreSQL cluster storage size.</td><td><a href="modify-cluster-attributes/increase-a-postgresql-cluster-storagesize">increase-a-postgresql-cluster-storagesize</a></td></tr><tr><td><mark style="color:blue;"><strong>Scale a PostgreSQL Cluster Vertically</strong></mark></td><td>Learn how to scale your PostgreSQL cluster vertically by adjusting RAM and CPU.</td><td><a href="modify-cluster-attributes/scale-a-postgresql-cluster-vertically">scale-a-postgresql-cluster-vertically</a></td></tr><tr><td><mark style="color:blue;"><strong>Scale a PostgreSQL Cluster Horizontally</strong></mark></td><td>Learn how to scale your PostgreSQL cluster horizontally by adding replicas.</td><td><a href="modify-cluster-attributes/scale-a-postgresql-cluster-horizontally">scale-a-postgresql-cluster-horizontally</a></td></tr><tr><td><mark style="color:blue;"><strong>Set a PostgreSQL Maintenance Window</strong></mark></td><td>Learn how to set maintenance windows for your PostgreSQL cluster.</td><td><a href="modify-cluster-attributes/set-a-postgresql-maintenance-window">set-a-postgresql-maintenance-window</a></td></tr><tr><td><mark style="color:blue;"><strong>Change a PostgreSQL Connection</strong></mark></td><td>Learn how to change the connection of your PostgreSQL cluster.</td><td><a href="modify-cluster-attributes/change-a-postgresql-connection">change-a-postgresql-connection</a></td></tr><tr><td><mark style="color:blue;"><strong>Activate a PostgreSQL Connection Pooler</strong></mark></td><td>Learn how to activate the connection pooler for your PostgreSQL cluster.</td><td><a href="modify-cluster-attributes/activate-a-postgresql-connection-pooler">activate-a-postgresql-connection-pooler</a></td></tr></tbody></table>