I'm experiencing unusual load issue on one of our VM which is on SAN storage.
As a general practice I ran iostat
on the server got very strange numbers.
avg-cpu: %user %nice %system %iowait %steal %idle
0.00 0.00 0.17 49.75 0.00 50.08
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util
sda 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.00 0.00 0.00 100.03
dm-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.00 0.00 0.00 100.00
dm-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
even if rkB/s
& wkB/s
both at 0 it still shows %util
at 100%.
Let me know if I am misunderstanding the output.
Thanks, Meghanand.