Can now adjust vCores via the UI

Author: jonels-msft

articles/postgresql/howto-hyperscale-scaling.md

@@ -5,7 +5,7 @@ author: jonels-msft
 ms.author: jonels
 ms.service: postgresql
 ms.topic: conceptual
-ms.date: 12/17/2019
+ms.date: 3/16/2020
 ---
 
 # Scale a Hyperscale (Citus) server group
@@ -45,12 +45,18 @@ The `rebalance_table_shards` function rebalances all tables in the
 argument. Thus you do not have to call the function for every distributed
 table, just call it on a representative table from each colocation group.
 
-## Increase vCores
+## Increase or decrease vCores on nodes
 
 In addition to adding new nodes, you can increase the capabilities of existing
-nodes. This feature is currently in preview — to request increased vCores for
-nodes in your server group, please [contact Azure
-support](https://portal.azure.com/?#blade/Microsoft_Azure_Support/HelpAndSupportBlade).
+nodes. Adjusting compute capacity up and down can be useful for performance
+experiments as well as short- or long-term changes to traffic demands.
+
+To change the vCores for all worker nodes, adjust the **vCores** slider under
+**Configuration (per worker node)**. The coordinator node's vCores can be
+adjusted independently. Click the **Change configuration** link under
+**coordinator node**. A dialog will appear with sliders for the vCores and
+Storage capacity of the coordinator. Change the sliders as desired and select
+**OK**.
 
 ## Next steps