I have an RRD that I created like this: rrdtool create simba-temperature.rrd \ DS:mbtemp:GAUGE:300:0:100 \ DS:cputemp:GAUGE:300:0:100 \ RRA:AVERAGE:0.5:1:288 \ RRA:MAX:0.5:1:288 \ RRA:AVERAGE:0.5:12:168 \ RRA:MAX:0.5:12:168
Every 5 minutes, a cronjob updates it. However, I have some strange gaps in my RRD graphs and inspecting using: "rrdtool fetch /root/rrd/simba-temperature.rrd AVERAGE" Shows the following: 1075302000: 2.6000000000e+01 2.3000000000e+01 1075302300: nan nan 1075302600: 2.6000000000e+01 2.3000000000e+01 1075302900: 2.6000000000e+01 2.3398666667e+01 1075303200: nan nan 1075303500: 2.6000000000e+01 2.2400000000e+01 1075303800: 2.6000000000e+01 2.2001333333e+01 1075304100: 2.6000000000e+01 2.2996666667e+01 1075304400: 2.6000000000e+01 2.2402000000e+01 I'm positive the RRD has been updated every five minutes. For one of the NaN values above, 1075303200 (Wed Jan 28 15:20:00) I got the following mail from cron: ** Debug ** NOW=Wed Jan 28 15:20:01 GMT 2004 RRDFILE=/root/rrd/simba-temperature.rrd UPDATE=N:26:23.0 The script then executes "rrdtool update $RRDFILE $UPDATE". This same script is the one that has put every other value in the RRD. An identical script runs on another machine and I haven't had any errors like this at all in the last few weeks it's been running. I've only noticed it on this one machine since installing rrdtool on there this morning and starting my data collection. So if I can be 99% sure that "rrdtool update" was run and 100% sure the values fed to it were correct, how come there's NaN in the database? Thanks, David -- Unsubscribe mailto:[EMAIL PROTECTED] Help mailto:[EMAIL PROTECTED] Archive http://www.ee.ethz.ch/~slist/rrd-users WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi
