There’s a number of ways to take a physical memory dump from a server without taking it offline. On Linux, there’s for example Lime if you have root. On windo

There’s a number of ways to take a physical memory dump from a server without taking it offline. On Linux, there’s for example Lime if you have root. On windows there’s various other tools, some commercial, some open source. All require admin privs. If you have access to the hypervisor it’s even easier - just direct the hypervisor to dump the VM’s RAM to a file. Most hypervisor tools have a utility for this. If you have only physical access it’s a bit trickier, but if there’s an available PCIe slot and you are very careful it’s possible to dump RAM that way on a live system :)