Re: [gentoo-user] strange TCP timeout errors

[Alan McKinnon <alan.mckinnon@gmail.com>]

On 07/10/2015 14:58, Grant wrote:
>>>> I've attached a PNG from Munin showing the TCP timeout errors on my
>>>> Gentoo server over the past month.  The data is expressed in timeouts
>>>> per second and that rate is shown to be steadily increasing over the
>>>> past month.  That seems strange to me.  Munin doesn't show any other
>>>> data point increasing like this over the time period.  Any ideas?
>>>>
>>>> - Grant
>>>>
>>>
>>> weird - does it reset on an interface restart or reboot?
>>
>> this would be my test #1
> 
> 
> I rebooted and the rate of errors has dropped off to almost nothing.
> 
> 
>>> Can you verify its not an artefact within munin (how?)
>>
>> In theory, a misconfigured graph can do this. Munin can draw many
>> different types of graph, including cumulative values. Even for a data
>> type like this which is X events per unit time, if you tell munin to add
>> them all up, it will do so and graph it.
>>
>> Qucik test is to look at the graph config.
> 
> 
> This graph lives in the "network" section of the munin web interface.
> There is no matching section in /etc/munin/plugin-conf.d/munin-node so
> it should be be using the default config.
> 
> Any ideas based on this new info?

A few :-)


I can't find the plugin that delivers that graph though. Maybe I just
don't have it, maybe it comes from contrib/

What's your USE for munin?
What do you have in "ls -al /etc/munin/plugins/"  ?


-- 
Alan McKinnon
alan.mckinnon@gmail.com