Depends on your rrdcached config.<div><br></div><div>My experience with collectd+rrdcached:</div><div>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.</div>
<div><br></div><div>I use it successfully for ganglia though, with arguments "-w 10800 -z 3600 -f 36000 -t 10".</div><div><br></div><div>b.</div><div><br><br><div class="gmail_quote">On 13 August 2012 12:34, Jeremy MAURO <span dir="ltr"><<a href="mailto:jmauro@antidot.net" target="_blank">jmauro@antidot.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<font face="Trebuchet MS">Hi everyone,<br>
<br>
<br>
I have a quick question for everybody, does anyone use
colletcd+rrdcached?<br>
<br>
<br>
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).<br>
<br>
<br>
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.<br>
<br>
<br>
Everything is on debian squeeze: collectd(</font><font face="Trebuchet MS">4.10.1-1+squeeze2)/rrdcached(</font>1.4.3-1)<br>
<font face="Trebuchet MS"><br>
<br>
<br>
Any idea why something that is supposed to reduce load is
dramatically increasing it?<span class="HOEnZb"><font color="#888888"><br>
<br>
<br>
<br>
</font></span></font><span class="HOEnZb"><font color="#888888">
<pre cols="72">--
Cordialement,
Jeremy MAURO
Jeremy MAURO (<a href="mailto:jmauro@antidot.net" target="_blank">jmauro@antidot.net</a>) - Ingénieur Systémes et Réseaux
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