Hi I see this in the rrdtool_rpn man page under the VDEF section: MAXIMUM, MINIMUM, AVERAGE <> Return the corresponding value, MAXIMUM and MINIMUM also return the first occurrence of that value in the time component. Example: VDEF:avg=mydata,AVERAGE
What is the “time component” referred to here? Is there a way to reference it? The reason I’m asking is because I’m trying to determine during which time of day traffic is the busiest - the so-called “busy hour”. My approach was to: 1. Force step=3600 to make it hourly averages 2. Get the hourly MAX values from the DEF 3. Determine the LTIME of the first occurence of MAX So this is what I tried (paraphrasing a bit to simplify the rpn): DEF:bytes_in_max=/some/path:bytes_in:MAX:step=3600:reduce=AVERAGE DEF:bytes_out_max=/some/path:bytes_out:MAX:step=3600:reduce=AVERAGE CDEF:max_util=bytes_in_max,bytes_out_max,MAX,8,* VDEF:busy_time=max_util,MAXIMUM,LTIME But seems that the VDEF is not valid with the LTIME added… I get “Unknown function MAXIMUM,LTIME” error. :-/ Any idea how I can find the time value for the hour at which MAXIMUM was for the VDEF? This is rrdtool-1.4.8, I haven’t tried with the latest rrdtool yet, but just want to know if I’m on the right track of if there is a better way... Thanks in advance. :) Cheers, Jacques
_______________________________________________ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users