[rrd-users] Disk I/O

Boer, Martin martin.boer at atosorigin.com
Thu Mar 13 13:04:11 CET 2008


We have 20000+ rrdfiles which are being updated every 5 minutes on a 5
year old system with 2 CPU's and a very old version of rrdtool. 
I have to admit the system is quite busy with it but your AMD system
should perform effortless with 2000 files.


-----Original Message-----
From: rrd-users-bounces at lists.oetiker.ch
[mailto:rrd-users-bounces at lists.oetiker.ch] On Behalf Of Steven Hartland
Sent: donderdag 13 maart 2008 12:38
To: plonka at doit.wisc.edu; rrd-users at lists.oetiker.ch
Subject: Re: [rrd-users] Disk I/O

I'd add to this, that we have issues with our machine which processes ~
2000 rrd files every 5 mins. The issue is the machine stalls for a very
noticeable amount of time sometimes up to 30+ seconds where no
interaction is possible.

I've raised this issue with the FreeBSD performance guys and will report
back if I find the cause.

N.B. Tested FreeBSD 6.2 and 7.0 both exhibit the same behaviour.
Machine is not small with a 8 disk raid 6 array and dual AMD 248 CPU's
with 2GB ram. OS tools so no swap usage.


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