On the MRTG website http://people.ee.ethz.ch/~oetiker/webtools/mrtg/mrtg-logfile.html <http://people.ee.ethz.ch/~oetiker/webtools/mrtg/mrtg-logfile.html> describing the log file format says that records immediately following the first record have the format
Column 1: Timestamp Column 2: Bytes input in last 5 minutes (i.e. since the last update) Column 3: Bytes output in the last 5 minutes Column 4: Max bytes input in a 5-minute period in the last INTERVAL Column 5: Max bytes output in a 5-minute period in the last INTERVAL. Regarding columns 4 and 5 it says they represent "[t]he... maximum ... transfer rate in bytes per second for the current INTERVAL [my caps]. This is calculated from all the updates which have occurred in the current INTERVAL. If the current INTERVAL is 1 hour, and updates have occurred every 5 minutes, it will be the biggest 5 minute transfer rate seen during the hour." From this I see that INTERVAL and update period are not necessarily the same thing-an INTERVAL could potentially have many update periods. An INTERVAL of an hour would have 12 5-minute update periods. However the MRTG configuration reference (http://people.ee.ethz.ch/~oetiker/webtools/mrtg/mrtg-reference.html) uses the word "interval" to mean the same thing as the update period (by default, 5 minutes). That seems consistent with the values I see in my log files columns 4 and 5-they're basically the same numbers as those in columns 2 and 3 (without being adjusted for delays in reading the OIDs, as columns 2 and 3 are) evidently because there's only one update in each interval, therefore its values are always the max that occurred in that interval. 1. Do I understand correctly? Is the max really the same as the reading for that 5-minute period because the INTERVAL and the update period are the same? 2. Can you leave the update period at the default 5 minutes (so you run MRTG every 5 minutes) but change the INTERVAL to be something else, say, a hour, so that columns 4 and 5 represent the max values gotten in 12 5-minute updates? If so how? Thanks! Margaret Margaret Sholaas, Senior System Network Analyst Regional Information System 125 East Eighth Avenue Eugene, OR 97401 Voice 541-682-4565 Page 541-710-4914 Email [EMAIL PROTECTED] -- Unsubscribe mailto:[EMAIL PROTECTED] Archive http://lists.ee.ethz.ch/mrtg FAQ http://faq.mrtg.org Homepage http://www.mrtg.org WebAdmin http://lists.ee.ethz.ch/lsg2.cgi
