Ah, I guess it was because I had Photoshop open.
After closing Photoshop, they are adding up to 22GB now.
You cannot allocate all of your CPUs and memory to AE. You have to have a balance to make multiprocessing work well, and then it will only work well on projects that support multi-frame rendering. Personally, I would reserve 12 GB for other apps and at least 4 CPUs. You have to experiment around and find out what works the best for your particular project. With your current settings you are wasting resources and slowing things down.
Thanks Rick. The above screenshot was just for an example for my question regarding "RAM shared by" instead of the system RAM itself. I found out having other Adobe products open effects these numbers.
Anyway, as for the setting, I tried this and it seems to work well... Any red flags on this?
RAM Reserved for Other programs: 10GB
RAM Shared by: 22GB
Installed CPUs: 16
CPU for Other Programs: 10
Ram per BG CPU: 3
Actual CPUs: 6
I often have 3D software open at the same time, and I work with comps that are equal to or above 1080p