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Cost Optimization Tips for Azure Application Gateway

Atisha Shaurya
Atisha Shaurya
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As organizations increasingly turn to the cloud for hosting their applications, it’s crucial to not only leverage the benefits of cloud services but also optimize costs effectively. Microsoft Azure’s Application Gateway is a powerful tool for load balancing and securing web applications, but without proper cost management, it can lead to unexpected expenses. In this blog, we will explore essential cost optimization tips for Azure Application Gateway, helping you make the most of this service while staying within your budget.

Rightsize Your Application Gateway

One of the first steps in cost optimization is rightsizing your Azure Application Gateway. Azure offers various SKUs (Service Level Agreements) with different performance levels and features. To avoid overprovisioning and unnecessary expenses, assess your application’s requirements and traffic patterns carefully. Microsoft provides detailed documentation to assist you in selecting the appropriate SKU for your needs.

Leverage Autoscaling

Azure Application Gateway supports autoscaling, which dynamically adjusts the number of instances based on traffic demand. By configuring autoscaling rules and thresholds, you ensure that you only pay for the resources required during peak usage periods. This flexibility can result in significant cost savings during periods of lower traffic.

Efficiently Configure Web Application Firewall (WAF) Rules

The Web Application Firewall (WAF) is a vital security component protecting your web applications from common vulnerabilities and attacks. While security is paramount, enabling too many WAF rules can inflate costs. Strike a balance between security and cost efficiency by enabling only the necessary WAF rules. Regularly review and optimize your rule set to achieve both robust security and cost savings.

Implement Caching

Caching can substantially improve your web application’s performance while simultaneously reducing the load on your Application Gateway and related costs. Azure Application Gateway supports content caching from backend servers. Strategically configure caching rules to reduce the number of requests to your backend servers, saving on data transfer costs. Cache content that doesn’t change frequently and set appropriate expiration policies.

Leverage Multi-Site Hosting

Azure Application Gateway allows you to host multiple web applications on a single gateway, sharing the same frontend IP and listener. This can lead to cost savings, especially if you have multiple small to medium-sized applications that can coexist on the same gateway. Consolidating applications onto a single gateway optimizes resource utilization and reduces the costs associated with maintaining multiple gateways.

Implement Traffic Routing Policies

Azure Application Gateway offers various traffic routing policies, including round-robin, weighted round-robin, and cookie-based routing. Utilizing these routing policies efficiently distributes traffic, preventing overutilization of specific backend resources. By balancing traffic effectively, you ensure optimal resource utilization and avoid unnecessary scaling, which can drive up costs.

Regular Monitoring and Optimization

Cost optimization is an ongoing process. Continuously monitor your Azure Application Gateway’s performance, resource utilization, and costs. Utilize Azure Monitor and Application Insights to gain insights into your application’s behavior and performance. Regularly review your configuration, scaling policies, and security rules to identify opportunities for further cost optimization.


Azure Application Gateway is a robust solution for enhancing the performance and security of your web applications. By following these cost optimization tips, you can maximize your investment while effectively managing your Azure expenses. Stay vigilant by regularly reviewing and adjusting your configuration to align with your application’s evolving needs and traffic patterns. With these strategies in place, you can navigate the Azure cloud while keeping your costs in check.

Atisha Shaurya

Atisha Shaurya

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