measuring exact IO wait:LINUX
iostat - Report Central Processing Unit (CPU) statistics and input/output statistics for devices and partitions.
We can get detailed report from iostat with N for LABEL.
# iostat -xN 1
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
sda 0.00 4.00 51.00 2.00 11640.00 48.00 220.53 0.08 1.49 1.42 7.50
zz_root 0.00 0.00 2.00 6.00 48.00 48.00 12.00 0.00 0.00 0.00 0.00
yyy_swap 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
xxxxx_home 0.00 0.00 49.00 0.00 11592.00 0.00 236.57 0.08 1.61 1.53 7.50
fuser: command lists the process numbers of local processes that use the local or remote files specified by the File parameter.
-v verbose output
-m show all processes using the named filesystems
# fuser -vm xxxxx_home
We can get detailed report from iostat with N for LABEL.
# iostat -xN 1
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
sda 0.00 4.00 51.00 2.00 11640.00 48.00 220.53 0.08 1.49 1.42 7.50
zz_root 0.00 0.00 2.00 6.00 48.00 48.00 12.00 0.00 0.00 0.00 0.00
yyy_swap 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
xxxxx_home 0.00 0.00 49.00 0.00 11592.00 0.00 236.57 0.08 1.61 1.53 7.50
fuser: command lists the process numbers of local processes that use the local or remote files specified by the File parameter.
-v verbose output
-m show all processes using the named filesystems
# fuser -vm xxxxx_home
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