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Oracle® Server X5-4 Product Notes

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Updated: August 2021

Error After Installing Oracle VM 3.3.2 Server on a System With a Large Amount of Memory (16557272)

In some instances, a system with a large amount of memory requires special configuration in order for Oracle VM to install and launch correctly. If not, you could receive the following error on launch after installation:

kernel panic -not syncing: Out of memory and no killable processes

If you install Oracle VM 3.3.2 from an ISO image or by using Oracle System Assistant, the dom0_mem parameter should be set correctly. If you install the Oracle VM software from PXE boot or some other customized environment and you have a large-memory system, you might need to recalculate the dom0_mem setting.


  • To recalculate the dom0_mem setting, using this formula:

    dom0_mem = 502 + int(physical_mem * 0.0205)

    For example, if your system has 128 GB of memory, you need to increase dom0_mem to 3188 MB:


    You can update the dom0_mem setting in the grub.conf file, or during installation by interrupting the boot process at grub menu and editing it there.

    For more information on the dom0_mem setting, refer to the Installing Oracle VM Server documentation:


    This problem is fixed in Oracle VM 3.3.3.