Alison L Greenwald wrote: > I am collecting data from an SNMP counter into an rrdtool database. > I'd like to be able to plot effectively the average number of > connections over time. So, for example, if I get (at 5 minute > intervals):
Starting at time "t": > 5, 10, 12, 20, 23 time value delta stored t+0000: 5 unknown unknown t+0300: 10 5 5/300= .0166666666 t+0600: 12 2 2/300= .0066666666 t+0900: 20 8 8/300= .0266666666 t+1200: 23 3 3/300= .0100000000 this is not what you want. (however, they're not percentages!) This means that the counter increased with 0.0166666 per second. RRDtool normally uses <whatever> per second so if you want it per 5 minutes, you'd have to multiply by 300: time value delta stored t+0000: 1500 unknown unknown t+0300: 3000 1500 1500/300= 5 t+0600: 3600 600 600/300= 2 t+0900: 6000 2400 2400/300= 8 t+1200: 6900 900 900/300= 3 > I want to plot the difference from the previous, value, i.e.: > <anything>, 5, 2, 8, 3 there you are. HTH -- __________________________________________________________________ / [EMAIL PROTECTED] [EMAIL PROTECTED] \ | work private | | My employer is capable of speaking therefore I speak only for myself | +----------------------------------------------------------------------+ | Technical questions sent directly to me will be nuked. Use the list. | +----------------------------------------------------------------------+ | http://faq.mrtg.org/ | | http://rrdtool.eu.org --> tutorial | +----------------------------------------------------------------------+ -- 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
