mrtg + cpu load

ну попробуй это...

#---Start CPU usage                                                                                 
#                                                                                                   
#                                                                                                   
Target[cpu]: `/usr/bin/awk '/cpu /{print $2+$3; print $2+$3+$4; print "Some_time";print "localhost"}'</proc/stat`
Title[cpu]: CPU usage
PageTop[cpu]: <H1>CPU Usage</H1>    
MaxBytes[cpu]: 100                                                                                  
ShortLegend[cpu]: %                                                                                 
YLegend[cpu]: CPU Usage                                                                             
Legend1[cpu]: Time spent in user mode                                                               
Legend2[cpu]: Time spent in user + system mode                                                      
LegendI[cpu]: user:                                                                                 
LegendO[cpu]: system:                                                                               
Options[cpu]: growright,nopercent,transparent,noborder,pngdate,noinfo                               
Unscaled[cpu]: ymwd                                                                                 
#---End CPU Usage