@juched - please note - I am not being critical of your stats efforts ... but believe me there is a problem and it is something relatively new [maybe the transition to unbound 1.10??].
One of the major attractions of Unbound was the performance gain it gave - a significant part of which can no doubt be attributed to its cache ability. Early adopters all confirmed HIGH cache hits.
I am utterly convinced that anyone who has done a FRESH [as in totally clean] install in the last month will not see the 90% hits you are still enjoying.
It makes no sense that a router with a single laptop client cannot get above an average of 29% in cache hits over a full 24 hours connected constantly to the router.
On my main router, which has been running for a couple of weeks and on which unbound was installed many moons ago, - I have seen a gradual decline in cache hits % from high eighties to low seventies - with no reboots and very little change in activity from the 20 devices connected.
You and
@Martineau are the "sponsors" of this wonderful utility - of course you are free to apply your minds openly to the information I have provided - or to move on. I believe that the TRUE cache hit rate in my case and from the spreadsheet I provided was in fact
91.57% for the 24 hour period and not
37.37% as reflected at that time on your 24 hr graph.