Here's a proper blog post on a hypothetical topic given your reference:
Usually runs smoothly with 512MB RAM and 1 CPU core. vios-adventerprisek9-m.vmdk.spa.156-2.t
Unlike Dynamips-based images (like the old 7200 series), this is a native QEMU/KVM virtual machine. It's significantly more stable and consumes fewer CPU resources once booted . Here's a proper blog post on a hypothetical