Configure dom0 Memory in XenServer 6.x

To configure the dom0 memory, complete the following procedure:

  1. On the XenServer host, open a local shell and log on as root.
  2. Enter the following command:
    /opt/xensource/libexec/xen-cmdline –set-xen dom0_mem=<nn>M,max:<nn>M
    <nn> represents the memory in megabytes, to be allocated to dom0. This value should be between 1024 and 4096, depending on the number of VMs that are expected to run and the total memory of the host. A higher value results in less memory being available to the VMs.

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XenServer 6.x to Auto-Start Virtual Machines

In XenServer versions 6.x, the direct GUI ability to auto-start a Virtual Machine on the startup of XenServer was removed as the auto-start functionality interfered with High Availability (HA) and produced unexpected results during HA functions

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