We notice very high i/o times in top and slow performance when going against a particular table, reads or writes. Dug up this command. Does this indicate that there is an issue on these devices? Once processing against this table finishes, i/o times go from 50% to .5%. Any experienced guidance is appreciated. Samples taken during processing. The actv keeps increasing.

Maintenance Commands iostat(1M)
Device name of the disk
r/s reads per second
w/s writes per second
Kr/s kilobytes read per second
Kw/s kilobytes written per second
wait average number of transactions waiting for service (queue length)
actv average number of transactions actively being serviced
(removed from the queue but not yet completed)
svc_t average service time, in milliseconds
%w percent of time there are transactions waiting for
service (queue non-empty)
%b percent of time the disk is busy (transactions in progress)


extended device statistics

r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device

2.0 0.0 67.4 0.0 0.0 1.4 0.0 692.1 0 100 c2t6d0

0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c2t6d0s2

0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c2t6d0s3

2.0 0.0 67.4 0.0 0.0 1.4 0.0 692.0 0 100 c2t6d0s4





0.0 0.0 0.0 0.0 0.0 1.0 0.0 0.0 0 100 c2t6d0

0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c2t6d0s2

0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c2t6d0s3

0.0 0.0 0.0 0.0 0.0 1.0 0.0 0.0 0 100 c2t6d0s4

0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c2t22d0





0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c3t22d0

1.0 0.0 63.9 0.0 0.0 1.0 0.0 1000.2 0 100 c2t6d0

0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c2t6d0s2

0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c2t6d0s3

1.0 0.0 63.9 0.0 0.0 1.0 0.0 1000.1 0 100 c2t6d0s4

16.0 0.0 866.5 0.0 0.0 0.1 0.0 5.1 0 8 c2t21d0


2.0 0.0 127.1 0.0 0.0 1.5 0.0 758.0 0 100 c2t6d0

0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c2t6d0s2

0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c2t6d0s3

2.0 0.0 127.1 0.0 0.0 1.5 0.0 758.1 0 100 c2t6d0s4



2.0 0.0 127.1 0.0 0.0 1.0 0.0 502.0 0 100 c2t6d0

0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c2t6d0s2

0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c2t6d0s3

2.0 0.0 127.1 0.0 0.0 1.0 0.0 502.0 0 100 c2t6d0s4



0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c2t8d0s3
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c2t8d0s4
1.0 0.0 63.4 0.0 0.0 1.0 0.0 1007.2 0 100 c2t6d0
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c2t6d0s2
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c2t6d0s3
1.0 0.0 63.4 0.0 0.0 1.0 0.0 1007.2 0 100 c2t6d0s4
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c2t22d0