Last weekend, I upgraded my machine to have 32 GB of RAM. I knew I didn't really need this much memory, but I figured macOS would use it for file caching or some such.
According to Activity Monitor, around 13 GB of memory are being used by applications, around 6 GB are being used for caching, and a whopping 13 GB are just being left idle. These numbers vary a bit depending on time and current workload, but in general, macOS consistently fails to use more than around 20 GB of memory.
Are there any steps I can take to make macOS utilize my additional memory? For example, it would be great if I could make macOS cache files more aggressively, to offset my computer's relatively slow SSD.