[rrd-users] Questions about different RRA`s

Ryan Steele steele at agora-net.com
Thu Apr 5 16:08:27 CEST 2007


Just my two cents - check out Cacti.  It comes with lots of pre-loaded 
RRD/RRA definitions, among them being the process counts.  Of all the 
frontends to RRDTool, I prefer Cacti over Munin, Cricket, MRTG, and the 
like.  The documentation is a bit less than you'd like, but once you get 
your head around it it's really a dream to work with.

Ryan Steele

David Schulz wrote:
> Hello,
> since a while i am digging around the Net to become more clear about  
> rrdtool, but i am not making much progress.
> My Goal is to graph the Number of Processes on my Server, for the  
> last  hour, day, week, month and year. In the beginning i just made  
> one big Archive, using
> Can someone show me how to best create one such .rrd with multiple  
> RRA`s, explain to me the calculations you made to decide on the  
> values for the RRA`s? I tried multiple combinations, one -
> rrdtool create process_count.rrd --step 60 DS:pc:GAUGE:120:0:U  
> RRA:AVERAGE:0.5:1:525960, which is supposed to take one value every  
> 60 seconds, for one year,
> but it appears it is better to split the different required times  
> into different RRA`s. I have no idea how to calculate this though. My  
> main Problem is to determine the exact Values for the individual  
> RRA:AVERAGE:0.5:?:?. I have read that for example this
> RRA:AVERAGE:0.5:1:60 should be one hour (1*60*60= 3600 seconds), and  
> RRA:AVERAGE:0.5:60:24 should be 24 hours, but how about a week or a  
> month for example? Why RRA:AVERAGE:0.5:60:24, and not RRA:AVERAGE: 
> 0.5:24:60, both should equal a week, right?
> I really need a push in the right direction here.
> Thanks a lot for any Explanation,
> David
> _______________________________________________
> rrd-users mailing list
> rrd-users at lists.oetiker.ch
> https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users

Ryan Steele                         
Systems Administrator            
AgoraNet, Inc.                      

More information about the rrd-users mailing list