Figure 19-1: Sample MRTG graph Get MRTG measuring
Figure 19-1: Sample MRTG graph Get MRTG measuring traffic on one of your machines, and then we’ll measure some other interesting things by choosing our SNMP MIBs. Tracking Other System Values By default, MRTG measures network traffic, but you can use it to measure any information available via SNMP. All you need are the MIBs for the information you want to measure. To make MRTG monitor these MIBs instead of network traffic, add them to the Target entry like so: ………………………………………………………………………………………. Target[label]:mibnumber1&mibnumber2:GetLostLoser@localhost ………………………………………………………………………………………. For example, to measure system CPU time (MIB .1.3.6.1.4.1.2021.11.9.0) and user CPU time (MIB .1.3.6.1.4.1.2021.11.10.0), use this line: ………………………………………………………………………………………. Target[cpu]:1.3.6.1.4.1.2021.11.9.0&1.3.6.1.4.1.2021.11.10.0.:GetLostLoser@localhost ………………………………………………………………………………………. Remember, MRTG charts MIBs in pairs, so pick values to monitor accordingly. Sensible choices are things like “available swap and total swap” or “system CPU usage and user CPU usage.” Measuring combinations such as available swap versus the percentage of disk available would give you difficult-to-understand charts. How do we know which MIBs to use? Well, digging through the snmpwalk output, and translating the system and user CPU times (enterprises.ucdavis.systemStats.ssCpuUser.0 and enterprises.ucdavis.systemStats.ssCpuSystem.0, respectively), we find that they translate to .1.3.6.1.4.1.2021.11.9.0 and .1.3.6.1.4.1.2021.11.10.0. You don’t want to go digging through the MIB tree to find this sort of thing, however, so I’ll make it a little easier for you. Useful Net-snmp MIBs Here are some net-snmp MIBs worth monitoring by name, with their corresponding numerical values in parentheses. All of these can be found under .1.3.6.1.4.1.2021. For example, the Memory.MemTotalSwap MIB can be determined by querying 1.3.6.1.4.1.2021.Memory.MemTotalSwap. Note Before using any MIB, be sure to test it at snmpwalk. Each query should return a single line. If it returns multiple lines, there’s probably an index on the end of it that you should include before entering that MIB in MRTG. 445
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[…] YouTube Link to Article linux Figure 19-1: Sample MRTG graph Get MRTG measuring » This excerpt is from an article posted at Unix Web Hosting for Developers on Saturday, August 18, 2007 Figure 19-1: Sample MRTG graph Get MRTG measuring traffic on one of your machines, and then we’ll measure some other interesting things by choosing our SNMP MIBs. Tracking Other System Values By default, MRTG measures network traffic, but you can use it to measure any information available via SNMP Summary Provided by Technorati.comView Original Article » 10 Most Recent News Articles About Linux […]
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