hi,
xm top
thanks walter
On 10 Aug 2011, at 16:33, Muriel <mucawhite@xxxxxxxxx> wrote:
> Hi all,
> can be a stupid question, but there is a method to calculate the free
> memory in a system that counts also the memory reserved for the Dom0?
> I tried using xm info and free comand but there is something wrong.
> A simple example, host with 4 GB, kernel 2.6.32.39, xen 4.0.2,
> scientific linux 6:
>
> --------------------------------------------
> xm info
> total_memory : 4094
> free_memory : 1046
>
> free -m
> total used free shared buffers cached
> 3456 1090 2365 0 8 127
>
> So from "xm info" i have 3048 MB reserved, but 3456 are for dom0 (
> difference -408)
> ------------------------------------------
>
> Now a system with 16GB, xen 4.1, centos 5:
> xm info:
> total_memory : 16381
> free_memory : 13633
>
> free -m
> total used free shared buffers cached
> 3072 2196 875 0 160 338
>
> For xm info i have 2748 MB reserved, but 3072 are for dom0 (diff -324)
> If I set the dom0 memory but the difference between xm info data and
> free remain constant.
> ------------------------------------------
>
> I have thought of memory reserved for the hypervisor, but then I tried
> with this configuration:
> host with 8GB, kernel 2.6.32.39, xen 4.0.2, scientific linux 6:
> xm info
> total_memory : 8190
> free_memory : 5006
>
> free -m
> total used free shared buffers cached
> 3072 2454 617 0 194 338
>
> For xm info i have 3190 MB reserved, but 3072 are for dom0 (diff +112).
> ------------------------------------------
>
> Someone can explain what happens?
> There is a simple and reliable way to get as much ram I have available for
> domU?
>
> Thanks,
> Muriel
>
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