Archive for category Citrix Xen Server

Citrix Xen Server 5.6 – CDROMMON using 99.9% of CPU

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

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