[mrtg] Re: Monitoring Redhat Linux Memory

[Steve Shipway]

> Does anyone have any idea how to monitor the correct mem 
> available using SNMP? [on linux]

I know an ugly way, if you can't use a non-SNMP agent like NRPE to do it.

Linux hands over the *useful* memory statistics in /proc/meminfo.  You can
write a perl script to parse out the appropriate lines, and then use the UCD
snmpd extensions to call the script by adding to the /etc/snmp/snmpd.conf a
line like 

exec memory-raw /bin/grep MemFree /proc/meminfo
exec memory     /usr/local/bin/mymemoryscript

The pull them out on OID enterprises.ucdavis.extTable.extEntry.extOutput

Steve


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