In snmpd.conf:
# Check for loads: load 12 14 14
Restart snmpd and check the results:
$ snmpwalk -v 1 -c public localhost .1.3.6.1.4.1.2021.10 UCD-SNMP-MIB::laIndex.1 = INTEGER: 1 UCD-SNMP-MIB::laIndex.2 = INTEGER: 2 UCD-SNMP-MIB::laIndex.3 = INTEGER: 3 UCD-SNMP-MIB::laNames.1 = STRING: Load-1 UCD-SNMP-MIB::laNames.2 = STRING: Load-5 UCD-SNMP-MIB::laNames.3 = STRING: Load-15 UCD-SNMP-MIB::laLoad.1 = STRING: 0.08 UCD-SNMP-MIB::laLoad.2 = STRING: 0.09 UCD-SNMP-MIB::laLoad.3 = STRING: 0.09 UCD-SNMP-MIB::laConfig.1 = STRING: 12.00 UCD-SNMP-MIB::laConfig.2 = STRING: 14.00 UCD-SNMP-MIB::laConfig.3 = STRING: 14.00 UCD-SNMP-MIB::laLoadInt.1 = INTEGER: 8 UCD-SNMP-MIB::laLoadInt.2 = INTEGER: 9 UCD-SNMP-MIB::laLoadInt.3 = INTEGER: 9 UCD-SNMP-MIB::laLoadFloat.1 = Opaque: Float: 0.080000 UCD-SNMP-MIB::laLoadFloat.2 = Opaque: Float: 0.090000 UCD-SNMP-MIB::laLoadFloat.3 = Opaque: Float: 0.090000 UCD-SNMP-MIB::laErrorFlag.1 = INTEGER: noError(0) UCD-SNMP-MIB::laErrorFlag.2 = INTEGER: noError(0) UCD-SNMP-MIB::laErrorFlag.3 = INTEGER: noError(0) UCD-SNMP-MIB::laErrMessage.1 = STRING: UCD-SNMP-MIB::laErrMessage.2 = STRING: UCD-SNMP-MIB::laErrMessage.3 = STRING:
In mrtg.cfg (obviously, substituting your hostname for mine, and checking where UCD-SNMP-MIB is actually located):
LoadMIBs: /usr/share/mibs/netsnmp/UCD-SNMP-MIB EnableSNMPv3: yes Target[araminta_load]: laLoadInt.2&laLoadInt.3:public@araminta Options[araminta_load]: gauge,growright,unknaszero Title[araminta_load]: araminta load average MaxBytes[araminta_load]: 100 YLegend[araminta_load]: centiProcs ShortLegend[araminta_load]: Procs PageTop[araminta_load]: <h1>araminta load average</h1> LegendI[araminta_load]: 5m average LegendO[araminta_load]: 15m average Factor[araminta_load]: 0.01
You need to use laLoadInt, which gives you 100 times the load. If you use laLoad, or try to divide by 100, it seems MRTG trucates to an integer.
The “EnableSNMPv3: yes” is important; without it you will get something like this in mrtg.log:
Unknown SNMP var laLoad.2 at /usr/bin/mrtg line 2207 Unknown SNMP var laLoad.3 at /usr/bin/mrtg line 2207 2010-06-19 11:10:01: WARNING: Expected a number but got '0:57:47' 2010-06-19 11:10:01: WARNING: Expected a number but got 'araminta'