Keep these limitations in mind when designing your Spin applications. You can also refer to the FAQ section to learn more about Akamai Functions.

Quota app limits

Limits are subject to change as part of public preview. If you’re interested in higher limits, please contact your Akamai representative for assistance.

Description	Default limit
Memory (RAM allocated per function execution)	128 MiB
App Size	50 MiB
Request handler duration	30 seconds
Request/response size	10 MiB

Functions KV quota limits

Description	Default limit
KV Storage (across all store instances)	2 GB
Requests supported per app	1,000 RPS
Maximum value size	1 MB
Maximum key size	8 KB

Spin limits

Akamai Functions supports Spin CLI v0.6.0 or newer. Some Spin SDK triggers and APIs are not yet supported on Akamai Functions.

To view the feature support for various programming languages, visit the Spin Language Support Guide.

Spin feature	Akamai Functions support
Triggers
HTTP	Supported
Redis	Not supported
APIs
Outbound HTTP	Supported
Configuration Variables	Supported
Key Value Storage	Supported
SQLite Storage	Not supported
Serverless AI	Limited Access
Service Chaining	Supported
MySQL	Supported
PostgreSQL	Supported
Outbound Redis	Supported
wasi-blobstore	Not supported in Spin, Not supported in Akamai Functions
wasi-config	Supported (2024-09-27 snapshot)
wasi-keyvalue	`wasi:keyvalue/store` and `wasi:keyvalue/batch` interfaces supported (2024-10-17 snapshot)
wasi-messaging	Not supported in Spin, Not supported in Akamai Functions
Features
Component dependencies	Supported
Extensibility
Custom Triggers	Not supported

Other limits

You cannot use local hostnames such as localhost or short service names, as you might in Docker Compose or Kubernetes, to communicate between Spin applications. To call another Spin application, use its full public URL instead, for example,https://<app-id>.fwf.app.

Runtime configuration is not supported at this time.

Support for Cron jobs and the ability to Schedule tasks with cron jobs in Spin is currently in Tech Preview.