Thanks for your reply.
My qemu version is qemu-kvm-rhev-0.12.
The key problem is, qemu-kvm process memory usage(RSS) always increases no matter how much memory used in guset vm.
for example, qemu-kvm process rss is 2.3g in host machine,
but free output in vm shows only 151MB
My question is :
1. Why qemu-kvm doesn't release physical memory ?
2. How to monitor real memory usage in guest vm?
Sincerely.
On Thursday, September 1, 2016 11:36 PM, Patrick PICHON <patrick@pichon.me> wrote:
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!!
> _______________________________________________
> libvirt-users mailing list
> libvirt-users@redhat.com
> https://www.redhat.com/mailman/listinfo/libvirt-users
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!!
> _______________________________________________
> libvirt-users mailing list
> libvirt-users@redhat.com
> https://www.redhat.com/mailman/listinfo/libvirt-users