| title | description | services | author | ms.assetid | ms.service | ms.topic | ms.date | ms.author | ms.custom |
|---|---|---|---|---|---|---|---|---|---|
include file |
include file |
api-management |
vladvino |
1b813833-39c8-46be-8666-fd0960cfbf04 |
api-management |
include |
04/14/2020 |
vlvinogr |
include file |
| Resource | Limit |
|---|---|
| Maximum number of scale units | 10 per region1 |
| Cache size | 5 GiB per unit2 |
| Concurrent back-end connections3 per HTTP authority | 2,048 per unit4 |
| Maximum cached response size | 2 MiB |
| Maximum policy document size | 256 KiB5 |
| Maximum custom gateway domains per service instance6 | 20 |
| Maximum number of CA certificates per service instance7 | 10 |
| Maximum number of service instances per subscription8 | 20 |
| Maximum number of subscriptions per service instance8 | 500 |
| Maximum number of client certificates per service instance8 | 50 |
| Maximum number of APIs per service instance8 | 50 |
| Maximum number of API operations per service instance8 | 1,000 |
| Maximum total request duration8 | 30 seconds |
| Maximum buffered payload size8 | 2 MiB |
| Maximum request URL size9 | 4096 bytes |
| Maximum number of self-hosted gateways10 | 25 |
1Scaling limits depend on the pricing tier. For details on the pricing tiers and their scaling limits, see API Management pricing.
2Per unit cache size depends on the pricing tier. To see the pricing tiers and their scaling limits, see API Management pricing.
3Connections are pooled and reused unless explicitly closed by the back end.
4This limit is per unit of the Basic, Standard, and Premium tiers. The Developer tier is limited to 1,024. This limit doesn't apply to the Consumption tier.
5This limit applies to the Basic, Standard, and Premium tiers. In the Consumption tier, policy document size is limited to 16 KiB.
6Multiple custom domains are supported in the Developer and Premium tiers only.
7CA certificates are not supported in the Consumption tier.
8This limit applies to the Consumption tier only. There are no limits in these categories for other tiers.
9Applies to the Consumption tier only. Includes an up to 2048 bytes long query string.
10Self-hosted gateways are supported in the Developer and Premium tiers only. The limit applies to the number of self-hosted gateway resources. To raise this limit please contact support. Note, that the number of nodes (or replicas) associated with a self-hosted gateway resource is unlimited in the Premium tier and capped at a single node in the Developer tier.