Why would the cache_hit in custom reports be zero?

Question

I setup a custom report and based on response times, the ResponseCache is working as expected, but when I setup a custom report with cache_hit, there are no hits and hundreds of traffic items. Any ideas on why this might be?

Update: I got this working by removing the request url drilldown.

Answer 1

A) Make sure your report is for the right environment (that is, do you have any traffic at all?)

B) Add a second dimension of overall traffic to see the ratio of taffic to cache

C) Add a drilldown to see the resources (are they hitting unique paths each time)

and finally

D) Check your CacheKey Key Fragments to see if you made your cache overly unique so everything gets treated as an invalid cache key.