We recently upgraded our Traffic Server instance to 7.1.2 from 5.3.1, and it
looks like some metrics are missing that were previously being populated in
our /_stats page.
I'm specifically interested in proxy.node.cache_hit_mem_ratio.
Looking through the ATS source code, it does seems like there are references
to it, but for some reason it's not populating on our page. I also still
see references to it in the documentation, so I'm assuming it's still