Determining the priority of Cloudflare's TTL with a chart! Explained in an easy-to-understand way!
The determination of TTL in Cloudflare is complexly influenced by Cloudflare's Workers, Page Rules, and default caching. The related links explain this determination in a chart. It also provides explanations about "Expires and Cache-Control" and "Public and Private," so please take a look. 【Overview】 ■ For cache expiration, there are the absolute time-specified Expires header and the relative time-specified Cache-Control header. ■ The Cache-Control header can specify either the Public or Private directive to allow or disallow caching by intermediate proxies. *For more details, please refer to the related links page or feel free to contact us.
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【Summary】 ■ If the Cache-Control header is set to private, no-store, no-cache, or max-age=0, or if there are cookies in the response, Cloudflare will not cache the resource. ■ Otherwise, if Cache-Control is set to public and max-age is greater than 0, or if the Expires header is a future date, Cloudflare will cache the resource. ■ If both max-age and the Expires header are set, max-age will be used. ■ If both max-age and s-max-age are set, s-max-age will be used. *For more details, please refer to the related link page or feel free to contact us.
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We have established and operate measurement and monitoring centers in five cities across the country (Sapporo, Niigata, Tokyo, Osaka, and Fukuoka). The measurement and monitoring systems in operation there are also used by major IT companies such as Google and Microsoft, as well as e-commerce sites and mobile companies like Verizon. We monitor the communication status of your web systems from various locations 24/7, analyze the data, optimize it, and support high-speed and stable web operations. We can detect communication failures and server issues, which have been occurring frequently lately, through measurements from across the country and immediately raise alerts. Additionally, we provide a web performance tuning service that ensures the display speed of websites, web applications, and mobile applications is completed within one second nationwide, achieving a 98% yield. Based on statistical quality control, we conduct data collection and analysis, and guarantee the achievement of displaying within one second through genuine performance tuning that addresses issues from the source code. Please feel free to contact us if you have any requests.