1# App Service Auto-scaling
2 
3## Basic Auto-scale Configuration
4 
5```bicep
6resource autoScale 'Microsoft.Insights/autoscalesettings@2022-10-01' = {
7  name: '${webApp.name}-autoscale'
8  location: location
9  properties: {
10    targetResourceUri: appServicePlan.id
11    enabled: true
12    profiles: [
13      {
14        name: 'Auto scale'
15        capacity: {
16          minimum: '1'
17          maximum: '10'
18          default: '1'
19        }
20        rules: [
21          {
22            metricTrigger: {
23              metricName: 'CpuPercentage'
24              metricResourceUri: appServicePlan.id
25              timeGrain: 'PT1M'
26              statistic: 'Average'
27              timeWindow: 'PT5M'
28              timeAggregation: 'Average'
29              operator: 'GreaterThan'
30              threshold: 70
31            }
32            scaleAction: {
33              direction: 'Increase'
34              type: 'ChangeCount'
35              value: '1'
36              cooldown: 'PT5M'
37            }
38          }
39        ]
40      }
41    ]
42  }
43}
44```
45 
46## Common Metrics
47 
48| Metric | Use Case |
49|--------|----------|
50| CpuPercentage | CPU-bound workloads |
51| MemoryPercentage | Memory-intensive apps |
52| HttpQueueLength | Request queue depth |
53| Requests | Request volume |
54 
55## Recommendations
56 
57| Workload | Min | Max | Metric |
58|----------|-----|-----|--------|
59| Production API | 2 | 10 | CPU + Requests |
60| Dev/Test | 1 | 3 | CPU |
61| High-traffic | 3 | 20 | HTTP Queue |
62 
63## SKU Requirements
64 
65Auto-scaling requires **Standard (S1+)** or **Premium** tier.
66