A harbor-ferry schedule site on a lower-tier App Service plan sleeps after idle periods, so the first morning commuter hits a long cold start. What should the developer enable, and what constraint applies?
Select an answer to reveal the explanation.
Short Explanation
Always On is like leaving a small night-light on so the ferry board does not have to boot from scratch for the first rider. It keeps the site process warm—but only on plans that offer the switch. Cold-start fixes are not the same as Application Insights pings.
Full Explanation
App Service Always On prevents the idle worker from unloading so requests avoid cold starts on supported plans. The setting is plan-dependent and is not present on every SKU. Availability tests and other monitoring tools can probe a URL but are Domain 4 instrumentation concerns; they are not the App Service configuration that keeps the worker loaded.