[2019] Dedicated hosting, clearing unused ram? 🤔

I think it's unlikely that you'd need to run it every hour. Maybe once a day. You could always just monitor your server for 24hr, run it once and see where it ends up after another 24hr of monitoring and if no impact try running it more frequently. It's also worth noting that you could check for large svchost.exe processes as sometimes those are hidden in private bytes and hogging up un-accounted for memory that you won't even see.