[rrd-users] Problem with max when summing two values

Erik A.Dahl edahl at mindspring.com
Wed Jul 16 22:22:59 MEST 2003

I'm summing values from two different rrd files and am having an issue. 
  The PRINT statements for using average come out correctly but the max 
statements are always low (by around 4-5%).  Here is an example command 
with the output:

rrdtool graph --end=1058300000 /dev/null 
CDEF:insum=in0,in1,+ PRINT:insum:MAX:max\\:%.2lf%s 
PRINT:in0:MAX:max\\:%.2lf%s PRINT:in1:MAX:max\\:%.2lf%s


21.64 + 21.97 = 43.61 != 41.44

Any thoughts?  I have moved the end time back before the last poll so 
that my DEFs aren't getting the last unknown value.

I'm using 1.0.41 on Solaris 2.8


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