Last Updated on April 18, 2023 by Vikash Ekka
The “x-cache: Miss from cloudfront” message is an HTTP header that can be seen in the response of a web server. It indicates that the requested resource was not cached by Amazon CloudFront and had to be fetched from the origin server.
What is CloudFront ?
CloudFront is a content delivery network (CDN) service provided by Amazon Web Services (AWS). It caches copies of static and dynamic content at edge locations around the world to improve the speed and reliability of delivery to end-users. When a user requests a resource, CloudFront checks if it has a cached copy of the resource at an edge location that is closer to the user. If it does, it serves the cached copy, which reduces latency and improves the overall user experience.
However, if the requested resource is not available in the cache or the cache has expired, CloudFront must fetch the resource from the origin server.
In this case, CloudFront will add the “x-cache: Miss from cloudfront” header to the response to indicate that the resource was not served from the cache.
Other possible values for the “x-cache” header include:
- x-cache: Hit from cloudfront – the requested resource was served from the CloudFront cache
- x-cache: RefreshHit from cloudfront – the requested resource was served from the CloudFront cache after it was refreshed
- x-cache: Error from cloudfront – an error occurred when CloudFront tried to fetch the resource from the origin server.
The “x-cache” header can provide useful information for diagnosing issues related to caching and content delivery on a website.
The “x-cache: Miss from cloudfront” message itself does not indicate any specific issue or problem that needs to be fixed. It is a normal response when CloudFront does not have a cached copy of the requested resource.
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How to Fix x-cache: Miss from cloudfront
There are several things you can do to optimize your use of CloudFront and reduce the frequency of cache misses:
- Configure caching behavior: CloudFront allows you to configure various caching options for your content, including cache control headers, TTL (time-to-live), and invalidation rules. By optimizing these settings, you can increase the chances that CloudFront will serve cached content and reduce the number of cache misses.
- Use CloudFront effectively: CloudFront is most effective when used to deliver static content, such as images, videos, and other files. If you are using CloudFront to deliver dynamic content, such as HTML pages or API responses, you may experience more cache misses.
- Monitor cache usage: CloudFront provides various monitoring and reporting tools that allow you to track cache usage and identify potential issues. By regularly monitoring cache usage, you can quickly identify any trends or patterns that may be impacting performance and take corrective action as needed.
- Use multiple edge locations: CloudFront has a global network of edge locations, and using multiple edge locations can improve performance and reduce the likelihood of cache misses. By spreading your content across multiple edge locations, you can ensure that users around the world have fast access to your content.
Conclusion
The “x-cache: Miss from cloudfront” message is not an error, but rather a normal response when CloudFront does not have a cached copy of a requested resource. To optimize your use of CloudFront and reduce the frequency of cache misses, you can configure caching behavior, use CloudFront effectively, monitor cache usage, and use multiple edge locations.
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