[libvirt-users] Monitor guest vm memory usage

[Patrick PICHON]

why not using collectd with the libvirt plugin on your host. It will 
colect the info, and then you just have to display with rrdtool


On , journey journey wrote:
> Hi All
> 
> Is there a tool to monitor qemu-kvm guest vm memory usage ( free in
> guest vm)?
> Nowadays, I have already researched some methods:
> 1. qemu-kvm process memory usage.
>      Since qemu-kvm process memory usage always increases as time goes
> on, it will not reflect the memory usage in vm.
> 2. virsh dommemstat
>      Just as method 1.
> 3. virsh qemu-monitor-command --hmp [domain name] "info mem"
>      (1) when guest vm memory size less than 4Gbytes, it will output
> something like this:
>             7f882000-7f883000 00001000 urw
>             7fbf8000-7fbf9000 00001000 urw
>             88000000-88001000 00001000 -rw
>             88002000-88003000 00001000 urw
>             88004000-88005000 00001000 urw
>             c9000000-c9001000 00001000 urw
>             e8bfe000-e8bff000 00001000 urw
>             ea000000-ea001000 00001000 urw
>             ffbfc000-ffbfd000 00001000 -rw
>             ffbfe000-ffbff000 00001000 urw
>            it shows pde info of PG_PRESENT_MASK, maybe has some
> relation with guest vm memory usage.
>       (2) when guest vm memory size larger than 4Gbytes, it will
> output noting.
> 
> Please help!!
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