[collectd] collectd makes high cpu load?

[Alessandro Iurlano]

Hi Kun.

I successfully reduced the load on our monitoring server using this parameter:
  CacheTimeout 120
This reduces the I/O operations as it caches them for two minutes.


2008/9/19 Kun Richárd <kun.richard at kirzen.hu>:
> Hi,
>
> 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?
>
> Thanks!
>
> --
> Ricsi
>  kun.richard at kirzen.hu
>
> [0]
> <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
> </Plugin>
>
>
> -----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?
>
> Regards,
> -octo
>
> [0] find /var/lib/collectd/rrd -name '*.rrd' | wc -l
> --
> Florian octo Forster
> Hacker in training
> GnuPG: 0x91523C3D
> http://verplant.org/
>
>
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