Environment:

• Citrix Xen Server 5.6


• Dell 2950

Issue:

• The server is relatively fast at the start up. After few minutes it starts to slow down and then the VMs become virtually unusable.


• Using Console or SSH run TOP command and you observe that CDROMMON process is taking 99.9% of the CPU

Resolution/Workaround:

• Kill the CDROMMON process using: Kill <pid></pid>


• Disable the CDROM in the BIOS of the physical machine