[Users] Problem running virtual machines

[Itamar Heim]

On 07/27/2012 12:15 PM, jose garcia wrote:
> On 07/27/2012 09:36 AM, Itamar Heim wrote:
>> On 07/26/2012 07:38 PM, jose garcia wrote:
>>> Apologies, version is 3.1.0-0.1.20120620git6ef9f8.fc17
>>>
>>> On 07/26/2012 05:18 PM, jose garcia wrote:
>>>> Good evening,
>>>>
>>>> I am running oVirt 3.
>>>>
>>>> I am not sure if the source of the problem is oVirt or KVM/qemu but
>>>> the machines run really slow since some days ago. There are some
>>>> warnings regarding iscsi storage latency in the oVirt portal but the
>>>> behaviour is also present with NFS storage.
>>>>
>>>> There are no visible errors either in engine.log or vdsm.log.
>>>> Var/log/messages in the node shows over and over:
>>>>
>>>>     /usr/sbin/irqbalance: Load average increasing, re-enabling all
>>>>     cpus for irq balancing
>>>>
>>
>> what type of storage? what networking from host to storage?
>
> Good morning,
>
> I have got two nodes for an iSCSI datacenter and another for a NFS
> datacenter. The machines run slow whatever the datacenter or node is
> used (all run fedora 17, recently updated).
>
> Networking is basic. Only ovirtmgmt bridge and one network interface is
> used per node.
>
> What is strange is that the VMs seem to run without any problem, only
> they take more time to perform any activity. That, of course, causes
> problems to ovirt-engine and the delays tend to set a node in a
> non-operational state, specially when installing.

VMs running slowly doesn't affect ovirt-engine.
slow storage affects the SPM, which in turn affects ovirt-engine.
what is the network bandwidth between nodes to storage? utilization? how 
many spindles on the storage server? type of storage server?

>
>>
>>
>>>>
>>>> and, after a while, waits in the node rise over 50%. It finally leads
>>>> to a disconnection of the SPM node and a non-operational state.
>>>>
>>>> Has anyone any ideas why this happens?
>>>>
>>>> Regards,
>>>>
>>>> Jose Garcia
>>>>
>>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at ovirt.org
>>> http://lists.ovirt.org/mailman/listinfo/users
>>>
>>
>>
>