Analysis for IO bottleneck in Unix
# sar -d Linux 2.4.21-27.ELsmp (pw101) 12/04/2005 12:00:00 AM DEV tps rd_sec/s wr_sec/s …. Average: dev8-128 7.16 5.37 75.07 Average: dev8-129 7.16 5.37 75.07 Average: dev8-130 0.00 0.00 0.00 …. The above command finds the busiest device. To determine what that device is, do: # more /proc/devices Character devices: 1 mem 2 pty 3 ttyp…