I'm seeing more marked differences in VDEF MINIMUM now. m@n:~$ rrdtool graph testing.png -s end-10000 DEF:noise=noise.rrd:noise:AVERAGE VDEF:min=noise,MINIMUM PRINT:min:%.1lf 0x0 5.2 m@n:~$ rrdtool graph testing.png -s end-25000 DEF:noise=noise.rrd:noise:AVERAGE VDEF:min=noise,MINIMUM PRINT:min:%.1lf 0x0 6.9
So the minimum recorded value in the last 10,000 seconds is 5.2 and the minimum recorded value in the last 25,000 seconds is 6.9. Any help appreciated. Thanks, Oliver. -----Original Message----- From: Oliver Sent: Thursday, August 04, 2011 11:25 PM To: rrd-users@lists.oetiker.ch Subject: [rrd-users] VDEF MINIMUM Hi, I'm slightly confused about the output I get from the VDEF MINIMUM function (RRDtool version 1.4.5, if that's relevant). Specifically: m@n:~$ rrdtool graph test.png -s end-10000 DEF:noise=noise.rrd:noise:AVERAGE VDEF:min=noise,MINIMUM PRINT:min:%.1lf 0x0 6.1 m@n:~$ rrdtool graph test.png -s end-15000 DEF:noise=noise.rrd:noise:AVERAGE VDEF:min=noise,MINIMUM PRINT:min:%.1lf 0x0 6.2 What I can't understand is how the minimum value recorded within the last 15,000 seconds can be higher than the minimum value recorded for the last 10,000 seconds, given that the last 15,000 seconds is a superset of the last 10,000 seconds. I'm probably misunderstanding the VDEF facility somehow. Can anyone shed any light on this please? Thanks, Oliver. _______________________________________________ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users _______________________________________________ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users