[collectd] collectd+rrdcached

[Bostjan Skufca]

Depends on your rrdcached config.

My experience with collectd+rrdcached:
I set it up, but I noticed it caused spikes in IOPS which blurred
interesting events on servers. Therefore I switched back and settled for
constant 10 IOPS.

I use it successfully for ganglia though, with arguments "-w 10800 -z 3600
-f 36000 -t 10".

b.


On 13 August 2012 12:34, Jeremy MAURO <jmauro at antidot.net> wrote:

>  Hi everyone,
>
>
> I have a quick question for everybody, does anyone use colletcd+rrdcached?
>
>
> Because I tried to setup the rrdcached pluding to stop using rrdtools
> plugin but when I do so the server is just under heavy IO load. Normally
> with rrdtool plugin the load is about 2-3 (See the attachment).
>
>
> But when I try to activate the rrdcached the server is just unusable, the
> load is about 25 (for a 16 CPUs) but I have something like 30% of IO wait.
>
>
> Everything is on debian squeeze: collectd(4.10.1-1+squeeze2)/rrdcached(
> 1.4.3-1)
>
>
>
> Any idea why something that is supposed to reduce load is dramatically
> increasing it?
>
>
>
>  --
> Cordialement,
> Jeremy MAURO
>
>
> Jeremy MAURO (jmauro at antidot.net) - Ingénieur Systémes et Réseaux
> Antidot - Solutions de recherche d'information
> 29 avenue Jean Monnet, 13410 LAMBESC (FRANCE)
> Tel: (+33) 4 42 63 67 90 / Fax: (+33) 4 42 28 61 03
>
>
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>
>
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