[Openstack] High load average on network node for traffic of 100-200 kbps - Juno no DVR

Nasir Mahmood nasir.mahmood at gmail.com
Sat Nov 14 09:09:54 UTC 2015


Try different tools like iftop, htop, atop  and netstat etc to monitor
what's causing it.

I would go with htop first.
On 13 Nov 2015 23:57, "mad Engineer" <themadengin33r at gmail.com> wrote:

> *Infrastructure*
> Running juno on ubuntu 14.04 with GRE network using  2 network nodes
> without DVR.
> There are around 200 dhcp namespaces created on each network
> nodes(dhcp_network_agents=2) which has 16 cpu and 32 gb.
>
> *Issue:*
> Network nodes are idle (top shows 99% idle CPU)but load average is
> *70-100* for a network traffic of 100-200 Kbps.
> I am not able to figure out why the load average is too high for an idle
> server with less than 100 Kbps (including my current ssh session)
>
> there is no impact for the instances but these numbers are worrying.
>
>
> *some observation:*
> CPU time spend on user space is 0%, kernel space is 0.1%,io wait is
> 0%,swap usage is 0%,and there are a lot of free RAM,No zombie,No process in
> un interruptible sleep.
>
>
> any idea why load average is very high?
>
>
>
>
>
>
>
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