[Xen-users] Domain-0 CPU

[CobraHost Support <cobrahost@xxxxxxxxxxxxx>]

Hello,

What is the best way to make sure that domain-0 does not become overloaded?

Because people keep loosing network-connectivity on XEN and regains connectivity.

Checked through the following command * xm top * and found out that the CPU was around 420% for domain-0

See - http://pastie.org/3873596

# grub.conf generated by anaconda

#

# Note that you do not have to rerun grub after making changes to this file

# NOTICE:  You have a /boot partition.  This means that

#          all kernel and initrd paths are relative to /boot/, eg.

#          root (hd0,0)

#          kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol00

#          initrd /initrd-version.img

#boot=/dev/sda

default=0

timeout=5

splashimage=(hd0,0)/grub/splash.xpm.gz

hiddenmenu

title CentOS (2.6.18-308.4.1.el5xen)

        root (hd0,0)

        kernel /xen.gz-4.1.2 dom0_mem=2048m dom0_max_vcpus=6

        module /vmlinuz-2.6.18-308.4.1.el5xen ro root=/dev/VolGroup00/LogVol00 p$

        module /initrd-2.6.18-308.4.1.el5xen.img

title CentOS (2.6.18-308.4.1.el5)

        root (hd0,0)

        kernel /vmlinuz-2.6.18-308.4.1.el5 ro root=/dev/VolGroup00/LogVol00

        initrd /initrd-2.6.18-308.4.1.el5.img

title CentOS (2.6.18-308.el5)

        root (hd0,0)

        kernel /vmlinuz-2.6.18-308.el5 ro root=/dev/VolGroup00/LogVol00

        initrd /initrd-2.6.18-308.el5.img

Anyone have a good idea on how to optimize our domain-0 to prevent such issues happening.

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