[rrd-users] rrdtool & performance: Advise on rrd file size and maximum number of rows

Tobias Oetiker tobi at oetiker.ch
Wed Jan 23 11:43:00 CET 2008

Hi Cyrille,

note that the number of rows in an rrd has virtually no performance
impact ... the number of individual rrd files is what will create a
(performance) problem once the server memory is to small to cache
the active rrd data blocks ... this will kick in at the few 10k
rrd files with any decent (~2GB memory) server.


Today Fabien Wernli wrote:

> On Wed, Jan 23, 2008 at 11:02:38AM +0100, Cyrille Bollu wrote:
> > we are planing to create a few hundred rrd files whose number of rows per
> > RRA might raise to about 100.000 (though most of them will have between
> > 1000 and 20.000 rows). The size of the resulting rrd files is expected to
> > be up to 10MB (up to 5 DS).
> >
> > I would like to know if these numbers seem reasonable for you.
> this seems _very_ reasonable, unless your server is 10 years old ;)
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Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten
http://it.oetiker.ch tobi at oetiker.ch ++41 62 213 9902

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