Linux server administration/sar/sar -d
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sar -d
To report disk (block devices) activity. See alsoiostat -x
.
sar -d 02:45:01 PM DEV tps rkB/s wkB/s areq-sz aqu-sz await svctm %util 02:46:01 PM dev7-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 02:46:01 PM dev7-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 02:46:01 PM dev7-2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
%iowait
column from sar
command also provide information about disk I/O requests.
sar 01:12:01 PM CPU %user %nice %system %iowait %steal %idle 01:13:01 PM all 2.99 0.00 6.58 7.13 0.00 83.30 01:14:01 PM all 5.39 0.00 2.30 6.70 0.00 85.61 01:15:01 PM all 4.80 0.00 0.96 8.91 0.00 85.33 01:16:01 PM all 4.65 0.00 0.64 6.19 0.00 88.52