Gluster users - Mar 2019 - Lots of connections on clients - appropriate values for various thread parameters

Hello Hubert,

On Mon, 4 Mar 2019 at 10:56, Hu Bert <revirii at googlemail.com> wrote:
> Hi Raghavendra,
>
> at the moment iowait and cpu consumption is quite low, the main
> problems appear during the weekend (high traffic, especially on
> sunday), so either we have to wait until next sunday or use a time
> machine ;-)
>
>
Check if your high IO Wait is not related to high network traffic. We had
to left 5.3 version due this issue[1]:

[1] - https://bugzilla.redhat.com/show_bug.cgi?id=1673058

Cheers,
Alberto
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Hi Alberto,

wow, good hint! We switched from old servers with version 4.1.6 to new
servers (fresh install) with version 5.3 on february 5th. I saw that
there was more network traffic on server side, but didn't watch it on
client side - the traffic went up significantly on both sides, from
about 20-40 MBit/s up to 200 MBit/s, on server side from about 20-40
MBit/s up to 500 MBit/s. Here's a screenshot of the munin graphs:

network traffic on high iowait client:
https://abload.de/img/client-eth1-traffic76j4i.jpg
network traffic on old servers: https://abload.de/img/oldservers-eth1nejzt.jpg
network traffic on new servers: https://abload.de/img/newservers-eth17ojkf.jpg

Don't know if that's related to our iowait problem, maybe only a
correlation. But we see the same high network traffic with v5.3.


Thx,
Hubert

Am Mo., 4. M?rz 2019 um 14:57 Uhr schrieb Alberto Bengoa
<alberto at bengoa.com.br>:
>
> Hello Hubert,
>
> On Mon, 4 Mar 2019 at 10:56, Hu Bert <revirii at googlemail.com>
wrote:
>>
>> Hi Raghavendra,
>>
>> at the moment iowait and cpu consumption is quite low, the main
>> problems appear during the weekend (high traffic, especially on
>> sunday), so either we have to wait until next sunday or use a time
>> machine ;-)
>>
>
> Check if your high IO Wait is not related to high network traffic. We had
to left 5.3 version due this issue[1]:
>
> [1] - https://bugzilla.redhat.com/show_bug.cgi?id=1673058
>
> Cheers,
> Alberto