Does the Azure Websites "Always On" option have any implication on price?
Do I pay less if "Always On" is off and page is asleep as wrote here?
I don't think so because you always paying for resources even if you don't use them, but please clarify.
The way you use resources, your subscription type, and pricing from third-party vendors have an impact on the cost of your Azure implementation. Among these factors that affect your costs are resource type, usage meters, resource usage, Azure subscription types, and Azure Marketplace.
For example, Azure's P1V2 web app plan gives you 1 core, 3.5GB Ram, and 250GB SSD of storage for $146.00 a month. This is the most viable option for me as any other cheaper dedicated hosting plans simply does not give me enough resources.
Our Free and Shared (preview) plans are ideal for testing applications in a managed Azure environment. Basic, Standard and Premium plans are for production workloads and run on dedicated Virtual Machine instances. Each instance can support multiple applications and domains.
- "When Always On is enabled on a site, Windows Azure will automatically ping your Web Site regularly to ensure that the Web Site is always active and in a warm/running state."
No, it has no affect on the price. For basic and standard modes you're paying for the entire VM anyways.
Keeping Always On helps conserve machine resources since sites that don't get much traffic (*1) get torn down, freeing up resources for other sites to use (*2). However, if you have a site that you want to stay up even during times of no traffic then feel free to enable Always On.
Edit: The only possible way Always On could increase your bill is if you have Auto Scale enabled based on Memory Consumption or something. Having a whole bunch of sites set to always be on might trigger the Auto Scale mechanism to add another instance (VM) to your Web Hosting Plan, resulting in a higher bill.
(*1) "Don't get much traffic" == has not had an http request for the past 20 minutes.
(*2) The first time a torn down site gets an http request it'll get started up automatically.
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