>From C* 2.2 onwards, SSTables get mapped to memory by mmap() so the hot data will be accessed much faster on systems with more RAM.
On Thu, 3 Dec 2020 at 09:57, Carl Mueller <carl.muel...@smartthings.com.invalid> wrote: > I agree in theory, I just want some way to confirm that file accesses in > the larger instance are being intercepted by the file cache, vs what is > happening in the other case. > > I've tried amy tobey's pcstat > > I'd assume the 2x would have a file cache with lots of partial caches of > files, churn in the files that are cached. But all the Index.db and Data.db > files are 100% cached according to that tool > >>
