I thought /dev/shm was ramdisk? Does /dev/shm stay? Surely it does but it is also capped at 50% RAM. Does that mean /dev/shm + /tmp can now get to 100% RAM? Or

I thought /dev/shm was ramdisk? Does /dev/shm stay? Surely it does but it is also capped at 50% RAM. Does that mean /dev/shm + /tmp can now get to 100% RAM? Or do they share the same ram budget?