Azure Function App Temp Usage¶
This learning hub explores how Azure Function Apps run on App Service infrastructure and how code, deployment choices, diagnostics, and workload behavior can influence temporary-file activity. The source repository contains two deliberately contrasting scenarios: a writable deployment with aggressive logging and a mounted-package deployment with reduced logging.
Warning
Treat this as a controlled learning comparison, not a universal statement about Azure Functions cleanup or platform behavior. Validate current limits, storage semantics, observability requirements, workload patterns, and operational guidance in the official Azure documentation for your hosting plan and region.
flowchart LR
T[Trigger] --> H[Functions host and language worker]
H --> C[Function code]
C --> L[Logs and telemetry]
C --> F[Temporary files]
L --> M[Application Insights and Azure Monitor]
F --> S[Ephemeral local storage]
D[Deployment configuration] --> H
D --> F
Runtime and temporary storageUnderstand the runtime layers, the distinction between app content and ephemeral local storage, and what to observe.
Compare the scenariosReview the source settings for writable and mounted-package experiments, then design a fair test.
Deploy and optimizeApply deployment, telemetry, identity, and operations practices appropriate to your workload.
Start here¶
| Need | Start with |
|---|---|
| Understand where temporary activity belongs in the runtime | Runtime and temporary storage |
| Reproduce the source comparison safely | Compare the scenarios |
| Improve an existing Function App deployment | Deploy and optimize |