When running hardware virtualized guests, the QEMU process (qemu-dm) may have its memory usage grow substantially, especially under heavy I/O loads. This may cause the hardware virtualized guest to stop as it runs out of memory. If the guest is stopped, increase the memory allocation for dom0, for example from 512 MB to 768 MB. See Section 1.1.6, “Changing the Oracle VM Server (Dom0) Memory Size” for information on changing the dom0 memory allocation.