[CentOS-virt] Issue with dom0 xen ballooning
frederic.soulier at univ-tlse1.fr
Wed Feb 20 16:08:36 UTC 2008
I'm having issue with my Centos 5.1 /Xen installation.
I'm having some dom0 running 2.6.18-53.1.6.el5xen (x86_64).
On the dom0 where the load is high (more than 70% of total system memory
consumed by dom0 and domU) we have a lot of "memory squeeze ".
The result is that the domU seems to be blocked (no network/no disk
Looking for a solution in xen user list, it seems the problem come from
dom0 xen ballooning.
With this option the dom0 attempt to use the maximum of the system
memory and "balloon" is memory when new domU needs memory.
To resolve it, we have to fix the dom0 memory usage to avoid dom0
ballooning and crash in our production environnemnt.
The solution seems to pass a parameter at xen boot time (in grub) to
limit dom0 memory usage : " dom0_mem=256M "
As anyone encounter this type of problems ?
Is there any other solution than limitting dom0 memory usage ?
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