added perf section

Author: christiankuhtz

articles/virtual-network/nat-gateway-resource.md

@@ -13,7 +13,7 @@ ms.devlang: na
 ms.topic: overview
 ms.tgt_pltfrm: na
 ms.workload: infrastructure-services
-ms.date: 04/09/2020
+ms.date: 04/24/2020
 ms.author: allensu
 ---
 
@@ -223,6 +223,12 @@ While the scenario will appear to work, its health model and failure mode is und
 >[!NOTE] 
 >IP addresses by themselves aren't zone-redundant if no zone is specified.  The frontend of a [Standard Load Balancer is zone-redundant](../load-balancer/load-balancer-standard-availability-zones.md#frontend) if an IP address isn't created in a specific zone.  This doesn't apply to NAT.  Only regional or zone-isolation is supported.
 
+## Performance
+
+Each NAT gateway resource can provide up to 50 Gbps of throughput. You can break your deployments out into multiple subnets and assign each or groups of subnets a NAT gateway to scale up.
+
+Each NAT gateway can support 64,000 connections per assigned outbound IP address.  Review the following section on Source Network Address Translation (SNAT) for details as well as the [troubleshooting article](https://docs.microsoft.com/azure/virtual-network/troubleshoot-nat) for specific problem resolution guidance.
+
 ## Source Network Address Translation
 
 Source network address translation (SNAT) rewrites the source of a flow to originate from a different IP address.  NAT gateway resources use a variant of SNAT commonly referred to port address translation (PAT). PAT rewrites the source address and source port. With SNAT, there's no fixed relationship between the number of private addresses and their translated public addresses.