Martin Frost wrote:
Oh, here's iostat output from after I stopped the slow scrub just now
(with more activity than I expected so maybe someone is working late
on New Year's Eve).
Martin
tty cpu
tin tout us sy wt id
0 83 0 4 0 96
extended device statistics ---- errors ---
r/s w/s Mr/s Mw/s wait actv wsvc_t asvc_t %w %b s/w h/w trn tot
device
0.1 3.2 0.0 0.0 0.0 0.0 0.0 0.2 0 0 0 0 0 0
c3t0d0
0.3 3.0 0.0 0.0 0.0 0.0 0.0 0.3 0 0 0 0 0 0
c3t1d0
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 0 0 0 0
c3t2d0
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 0 0 0 0
c3t3d0
95.1 0.0 2.0 0.0 0.0 0.5 0.0 5.5 0 19 0 0 2 2
c1t5000C50035063BC3d0
Something is doing lots of small reads, possibly soaking up most of your
read IOPs. The transport (trn) errors are unexpected, is there anything
in the system logs?
dtrace -n 'syscall::read:entry { @Execs[execname] = count(); }'
Should give you hint regarding the reads.
--
Ian.
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