[ovirt-users] The host xxx did not satisfy internal filter Memory because its available memory is too low

[yimao]

Yes, you are right. The HostedEngine vm's default Memory Size is 14940
MB. When I turn down the memory size, the Max free Memory for
scheduling new VMs  has increased.

Thank you very much.

2017-03-28 16:57 GMT+08:00 Martin Sivak <msivak at redhat.com>:
>> Looks like a bug, the "Max free Memory for scheduling new VMs" in the case
>> when we do not have memory optimization must be equal to the free memory on
>> the host(minus some small amount of the reserved memory).
>
> This is unfortunately not accurate at all.
>
> Max free Memory for scheduling new VMs takes into account the
> theoretically possible maximal memory consumption of all running VMs.
> But the Linux kernel and Qemu won't eat all the physical memory
> immediately. That is why you can see pretty big difference between
> those two numbers (free memory and memory available for new VMs).
>
> For example:
>
> Host 10 GiB of RAM
> 2 running VMs configured to eat 4GiB of RAM each
> but the VMs are not doing anything and really use only 1GiB of RAM each
>
> The result? Max memory for new VMs: 2 GiB, Free memory on the host: 8 GiB
>
>
> How many VMs are you running on the host? What are their memory allocations?
>
> Best regards
>
> --
> Martin Sivak
> SLA / oVirt
>
> On Mon, Mar 27, 2017 at 10:57 AM, Artyom Lukianov <alukiano at redhat.com> wrote:
>> Looks like a bug, the "Max free Memory for scheduling new VMs" in the case
>> when we do not have memory optimization must be equal to the free memory on
>> the host(minus some small amount of the reserved memory). Can you please
>> provide the screenshot of the host in the engine and also output of the
>> command # free -h on the problematic host.
>>
>> Best Regards
>>
>> On Sun, Mar 26, 2017 at 6:13 PM, yimao <yiimao.y at gmail.com> wrote:
>>>
>>> Hi,
>>>
>>> When I create vm after I have installed ovirt Node 4.1.1 successfully,
>>> I got this error message "The host xxxx did not satisfy internal
>>> filter Memory because its available memory is too low".
>>>
>>> I use ovirt node:ovirt-node-ng-installer-ovirt-4.1-2017032304.iso and
>>> ovirt-engine-appliance-4.1-20170322.1.el7.centos.noarch.rpm. And I
>>> followed the steps in http://www.ovirt.org/node/.
>>>
>>> I found the informations in  "hosts"->"general"->"info" page:
>>> "Max free Memory for scheduling new VMs: 356 MB"
>>> "Physical Memory: 15747 MB total, 5039 MB used, 10708 MB free"
>>>
>>> Why the free memory for scheduling new vms is so little? Is there
>>> anything wrong with my configuration?
>>>
>>> Thanks in advance,
>>> Yiimao Yang.
>>> _______________________________________________
>>> Users mailing list
>>> Users at ovirt.org
>>> http://lists.ovirt.org/mailman/listinfo/users
>>
>>
>>
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