I have some graphs set up, using a step of 60 seconds. The input comes from a value that's being sent to a pump, which is cycling on and off fairly quickly. In these graphs, it's cycling on to 500, then off to 0, on about 6-10 minute intervals. around 12:50, the on value is changed to 400, then 150.
Anyways, when the data is being shown using AVERAGE on a 1-day scale (no --step option), it seems to be averaging it over 5 minutes (and producing some very strange looking graphs), while with LAST it shows things properly. The graphs are posted at: http://www.mwater.ca/rrdtool 6hr* and day* are the last 6 hours and the last day, respectively. I included the 6hr so you can see with more detail what exactly it's doing (in the 1 day, it's a bit compressed). The same behaviour seems to happen with MIN/MAX, as you can see in pressure.gif. That is a graph of LAST, with MIN and MAX for the last 6 hours. You can see fairly detailed data for the blue (LAST) line, where as the MIN and MAX lines seem to be only showing 5 minutes of data. I don't recall this behaviour ever happening with a step of 300 (averaging out over a longer period than 300). These graphs were generated with rrdtool 1.0.42. I don't see anything in the changelog that mentions any fixes related to this problem, however. ttyl, greg -- 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
