update service limits

Author: greg-lindsay

includes/traffic-manager-limits.md

@@ -3,14 +3,54 @@ title: include file
 description: include file
 author: greg-lindsay
 ms.topic: include
-ms.date: 06/07/2021
+ms.date: 05/05/2025
 ms.author: greglin
 ms.custom: include file
 ---
 
+#### Resource limits
+
 | Resource | Limit |
 | --- | --- |
 | Profiles per subscription |200 <sup>1</sup> |
 | Endpoints per profile |200 |
 
-<sup>1</sup>If you need to increase these limits, contact Azure Support.
+<sup>1</sup>If you need to increase these limits, contact Azure Support.
+
+#### Default throttling limits
+
+To ensure reliable performance and fair usage, Azure Traffic Manager enforces throttling on control plane APIs. These limits are applied per Azure subscription, typically over a 20-second interval. 
+
+Exceeding limits returns an HTTP 429 (too many requests) with a `retry-after` header.  
+
+Throttling does not affect health checks or traffic routing. 
+
+##### Profiles
+
+| Operation | Limit (per minute) |
+| --- | --- |
+| Create/update | 600 |
+| Get | 450 |
+| Delete | 150 |
+| List in resouce group or subscription | 450 |
+| Check DNS name availability | 300 |
+
+##### Endpoints
+
+| Operation | Limit (per minute) |
+| --- | --- |
+| Create/update/delete | 300 |
+| Get | 1500 |
+
+##### Metrics & heatmap
+
+| Operation | Limit (per minute) |
+| --- | --- |
+| Get/create/delete user metrics key | 150 |
+| Get heat map | 150 |
+
+##### Geo hierarchy
+
+| Operation | Limit (per minute) |
+| --- | --- |
+| Get | 150 |