Controller Management

STATS HOSTDELAY displays a histogram of the time delay between when the last data transfer is set ready and the host command completes (Figure 3–35).The host ready delay information is shown in 100msec intervals.

15000 [1]: stats hostdelay

 

 

 

 

 

 

 

 

Host Command Ready Delay Statistics

 

 

Time

Port 1

Port 2

Port 3

Port 4

seconds

Reads

Writes

Reads

Writes

Reads

Writes

Reads

Writes

0.1

0

0

0

0

0

0

0

0

0.2

0

0

0

1

0

0

0

0

0.3

0

0

0

1

2

1

0

0

0.4

0

0

1

2

0

2

0

0

0.5

0

0

0

0

0

0

0

0

0.6

0

0

0

1

0

2

0

0

0.7

0

0

0

1

0

2

0

0

0.8

0

0

0

0

0

0

0

0

0.9

0

0

0

0

0

0

0

0

1.0

0

0

0

0

0

2

0

0

1.1

0

0

0

0

0

0

0

0

1.2

0

0

0

0

0

1

0

0

1.3

0

0

0

0

2

1

0

0

1.4

0

0

0

0

2

1

0

0

1.5

0

0

0

0

0

0

0

0

1.6

0

0

0

0

0

0

0

0

Figure 3–35Host Delay Statistics Screen

STATS TIERDELAY=<tier> displays a histogram of the time it takes for the disk I/O request to complete for all the disks in the specified tier (Figure 3–36).If no tier is specified, all valid tiers will be displayed.

15000 [1]: stats tierdelay

 

 

 

 

 

 

 

 

 

 

Tier 1 Delay Statistics

 

 

 

 

Time

A

B

C

D

Disk Channels

G

H

P

S

seconds

E

F

0.1

3407b

33108

339bd

3409f

572c5

34c0d

33640

30603

3391a

7ed5d

0.2

480f4

4885c

4866a

48190

27b83

47910

484cc

4acc1

48196

21e

0.3

2ca6

33d8

2def

2c1f

127

2928

324f

3a63

32a7

0

0.4

d1

1bc

cd

c7

0

c0

185

10f

176

0

0.5

2c

2b

26

12

0

23

27

33

36

0

0.6

13

1b

14

12

0

e

13

1d

1d

0

0.7

13

15

7

a

6

e

15

28

17

0

....

0

0

0

0

0

0

0

0

0

0

1.8

1.9

0

0

0

0

0

0

0

0

0

0

2.0

0

0

0

0

0

0

0

0

0

0

Hit enter to continue, ‘e’ to escape:

Figure 3–36Tier Delay Statistics Screen

007-5510-002

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Image 77
APC 15000 RAID manual 35Host Delay Statistics Screen