This plug-in was written to get performance data from sar. It was developed for
use with Zenoss but should work with other NRPE compatible NMS.

Example output:

check_sar_perf cpu
sar OK| CPU=all user=59.90 nice=0.00 system=4.46 iowait=0.00 steal=0.00
idle=35.64

check_sar_perf disk sda
sar OK| DEV=sda tps=0.00 rd_sec/s=0.00 wr_sec/s=0.00 avgrq-sz=0.00
avgqu-sz=0.00 await=0.00 svctm=0.00 util=0.00