[collectd] collectd makes high cpu load?

Kun Richárd kun.richard at kirzen.hu
Fri Sep 19 11:12:14 CEST 2008


I use rrdtol plugin, their config is [0], the number of RRD files is 1433.

I've been watching the iostat and sar statistics, and I seen 2Mb/s
continuous writing, when the collectd runs.

The machine have 4G ram, I think it's enough, but the storage... The machine
is a HP Proliant DL360G5, with SAS disk and HP Smart Array P400i controller,
I thought it will be enough:)

Any suggestion?

 kun.richard at kirzen.hu

<Plugin rrdtool>
        DataDir "/var/lib/collectd/rrd"
#       CacheTimeout 120
#       CacheFlush 900
# The following settings are rather advanced
# and should usually not be touched:
#       StepSize 10
#       HeartBeat 20
#       RRARows 1200
#       RRATimespan 158112000
#       XFF 0.1

-----Original Message-----
From: Florian Forster [mailto:octo at verplant.org] 
Sent: Friday, September 19, 2008 10:42 AM
To: Kun Richárd
Cc: collectd at verplant.org
Subject: Re: [collectd] collectd makes high cpu load?

Hi Richárd,

On Thu, Sep 18, 2008 at 04:55:51PM +0200, Kun Richárd wrote:
> On the monitoringserver with Dual Xeon CPU (Intel(R) Xeon(R) CPU E5320
> @ 1.86GHz) the colletcd makes 2-3 load, but I don't know why.

do you use the `rrdtool' plugin? If so, how is it configured (just post
the configuration of the plugin here) and how many RRD files (how to
find out: [0]) do you have? Also, what kind of storage do you use? How
much memory does the machine have?


[0] find /var/lib/collectd/rrd -name '*.rrd' | wc -l
Florian octo Forster
Hacker in training
GnuPG: 0x91523C3D

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