Content delivery speed is low: how to solve the issue
Revise your origin to find errors or misconfigurations that may affect the content delivery speed. Contact your hosting provider or server administrator for help in the case analysis.
Check the delivery speed from a CDN-resource and an origin server
1. Measure the content delivery speed from both a CDN-resource and an origin server using:
DevTools (F12->Network tab->F5).
Online-services. Consider network settings and location which are chosen for the speed test.
wget –S + static file URL.
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wget -S testsupport.cdn.com/files/test.jpg --2019-12-10 13:29:17-- http://testsupport.cdn.com/files/test.jpg Resolving testsupport.cdn.com... 92.223.97.97 Connecting to testsupport.cdn.com|92.223.97.97|:80... connected. HTTP request sent, awaiting response... HTTP/1.1 200 OK Server: nginx Date: Tue, 10 Dec 2019 08:29:17 GMT Content-Type: image/jpeg Content-Length: 290 Connection: keep-alive Last-Modified: Fri, 06 Dec 2019 10:12:14 GMT ETag: "5dea297e-122" Set-Cookie: 48c62c809b061c360cc201975b7fa802 Cache: MISS X-ID: fr5-up-gc22 Accept-Ranges: bytes Syntax error in Set-Cookie: 48c62c809b061c360cc201975b7fa802 at position 32. Length: 290 [image/jpeg] Saving to: 'test.jpg' test.jpg 100%[=================================================>\] 290 --.-KB/s in 0s 2019-12-10 13:29:18 (5,38 MB/s) - 'test.jpg' saved [290/290]
2. Compare the delivery speed from CDN and the origin server.3. If the analysis confirmed issues with content delivery speed from CDN, revise CDN-resource’s settings.
1. Make sure that you don’t use a VPN or proxy.
VPN affects the CDN Geobalancing and you may receive content from a not optimal edge with lower speed.2. Make sure that content is being cached. The cache rate is presented by Cache Hit Ratio report. If you noticed that the cache rate is low, use our instructions to analyze and solve this issue.3. If an issue with content delivery speed occurs with large files, we recommend you to use Large files delivery optimization and consider content compression on CDN or the origin server.
If you revised your CDN resource’s settings but are still unsatisfied with the download speed, contact technical support and provide the following information:
File URL
Follow the link http://iam.gcdn.co/info, copy all information from the page or save a screenshot.
Follow the try speed test link, click on the Start button, save the result, and add it to the ticket.
Wget –S output for the URL from your CDN-resource.