Comment by olcarl

I have used both with rails. (Cable is still going through Redis tho).

Solid cache is perfect for my use case since page caches doesn't change as often, so taking a smaller memory footprint on the server farm is a win.

My take is to measure your cache hit percentage. This will allow anyone to understand their cache eviction rates. If you have high eviction rates maybe using a btree is not the way to go and redis is probably better