[rrd-users] creating targets based on math equations

Nabil BouDiab mr_bou at yahoo.com
Thu Mar 8 15:03:15 CET 2007


I am trying to monitor using MRTG total memory and used memory .. however we only have OIDs for used and free memory. 
so my target is as follows 
Target[test]: at router_ip 

I would like to have the IN parameter as the sum of 2 while keeping the second as is, ie something like 
Target[test]:( + at router_ip 

from what i read it seems we can only sum in and out values ie 
Target[test]: at router_ip + at router_ip 

this will eventually give us total memory as IN and 2x used memory as OUT 

any ideas ?? 


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