HTTP response header
The X-Varnish HTTP header allows you to find the correct log-entries for the transaction. For a cache hit X-Varnish will contain both the ID of the current request and the ID of the request that populated the cache. It makes debugging Varnish a lot easier.
Header usage statisticsX-Varnish-cache response header information and usage statistics.
|Websites using header X-Varnish-cache
|Percentage of websites that use X-Varnish-cache header
|Total discovered header values
|Header uses directives
|Header values are unique or random
|Most popular in the country