![]() ![]() ![]() A variety of performance metrics help measure how much a CDN has helped to speed up a web app or website.Int main(int argc, char *argv) // pass in arguments Any content that is cached in one data center) can be served from every other data center as well.Ĭaching is an important part of what a CDN does, but its main purpose is to make web properties faster and more reliable in general. The Cloudflare CDN is built to serve any content from any of our 285 locations around the world. If this doesn't occur, the CDN's performance will not be optimal. Ideally, a CDN will serve content from the CDN server closest to the end user. For instance, where the content is served from is also important. Does a high cache hit ratio always mean a CDN is effective?Ĭache hit ratio is not the last word in CDN performance other factors are extremely important in assessing a CDN's effectiveness as well. Additionally, a website with lots of dynamic content may have a much lower cache hit ratio (although caching dynamic content is becoming possible). However, getting this metric as high as possible isn't the only goal of a CDN. What is a good CDN cache hit ratio for most websites?Ī typical website that's mostly made up of static content could easily have a cache hit ratio in the 95-99% range. The CDN server will cache the photo once the origin server responds, so that additional requests for it will result in a cache hit. If a copy of the cat-playing-piano picture is not currently in the CDN cache, this request results in a cache miss, and the request is passed along to the origin server for the original picture. What is a cache miss?Ī cache miss is when the cache does not contain the requested content. ![]() If the CDN has a copy of the picture in its storage, then the request results in a cache hit, and the picture is sent to the browser. For instance, if a user visits a webpage that's supposed to display a picture of a cat playing a piano, the browser may send a request to the webpage's CDN for this picture. What is a cache hit?Ī "cache hit" occurs when a file is requested from a cache and the cache is able to fulfill that request. Most CDN services will provide customers with this metric within their user interface or dashboard. However, it is an especially important benchmark for CDNs. As a percentage, this would be a cache hit ratio of 95.1%.Ĭache hit ratio is a metric that applies to any cache it's not just for measuring CDN performance. The cache hit ratio can also be expressed as a percentage by multiplying this result by 100. The formula for calculating a cache hit ratio is as follows:įor example, if a CDN has 39 cache hits and 2 cache misses over a given timeframe, then the cache hit ratio is equal to 39 divided by 41, or 0.951. A content delivery network (CDN) provides a type of cache, and a high-performing CDN will have a high cache hit ratio. Secure endpoints for your remote workforce by deploying our client with your MDM vendorsĮnhance on-demand DDoS protection with unified network-layer security & observabilityĬonnect to Cloudflare using your existing WAN or SD-WAN infrastructureĬache hit ratio is a measurement of how many content requests a cache is able to fill successfully, compared to how many requests it receives. Get frictionless authentication across provider types with our identity partnershipsĮxtend your network to Cloudflare over secure, high-performing links Integrate device posture signals from endpoint security programs We work with partners to provide network, storage, & power for faster, safer delivery We partner with leading cyber insurers & incident response providers to reduce cyber risk We partner with an alliance of providers committed to reducing data transfer fees Use insights to tune Cloudflare & provide the best experience for your end users Apply to become a technology partner to facilitate & drive our innovative technologies ![]()
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