I touch rarely our Aruba 2530...so I didn't notice the laggy SSH...but it's laggy...both on YA.16.08.0002 and on YA.16.08.0003 (just updated to test).
I see the CPU flying high...up to 45% (with a 34% average on 1 minute) to then decrease to 13/15% Busy (with an 14% average on 1 minute).
I also did a process-tracking...
HP J9776A 2530-24G Switch
Software revision YA.16.08.0003
DL1-103# show cpu
26 percent busy, from 300 sec ago
1 sec ave: 47 percent busy
5 sec ave: 49 percent busy
1 min ave: 34 percent busy
DL1-103# show cpu
43 percent busy, from 4 sec ago
1 sec ave: 40 percent busy
5 sec ave: 44 percent busy
1 min ave: 34 percent busy
DL1-103# show cpu
40 percent busy, from 2 sec ago
1 sec ave: 41 percent busy
5 sec ave: 41 percent busy
1 min ave: 34 percent busy
DL1-103# show cpu
43 percent busy, from 4 sec ago
1 sec ave: 44 percent busy
5 sec ave: 42 percent busy
1 min ave: 34 percent busy
DL1-103# show cpu
44 percent busy, from 2 sec ago
1 sec ave: 45 percent busy
5 sec ave: 43 percent busy
1 min ave: 34 percent busy
DL1-103# show cpu
42 percent busy, from 5 sec ago
1 sec ave: 42 percent busy
5 sec ave: 42 percent busy
1 min ave: 34 percent busy
DL1-103# show cpu
42 percent busy, from 2 sec ago
1 sec ave: 42 percent busy
5 sec ave: 41 percent busy
1 min ave: 34 percent busy
DL1-103# show cpu
0 percent busy, from 0 sec ago
1 sec ave: 42 percent busy
5 sec ave: 41 percent busy
1 min ave: 34 percent busy
DL1-103# show cpu
44 percent busy, from 1 sec ago
1 sec ave: 44 percent busy
5 sec ave: 42 percent busy
1 min ave: 34 percent busy
DL1-103# process-tracking
ATTENTION : You are enabling the 'Process-Tracking' capability for the module.
This can affect the performance of the module.
Do you want to enable Process-Tracking functionality [y/N]? y
Process-tracking started
Process-tracking time interval : 30 seconds
DL1-103# show cpu process
Process tracker state: ACTIVE
Process tracking time: 30 seconds
Total % Time Since Times Max
Process Name Priority Time CPU Last Ran Ran Time
--------------------+----------+--------+-----+-----------+----------+-------
Sessions & I/O-7 146 78 ms 1 775 us 344 5 ms
Hardware Mgmt-7 193 397 ms 6 35 ms 5703 190 us
Idle-3 1 1 s 20 39 ms 60733 96 us
Idle-1 226 2 s 26 3 ms 29467 146 us
System Services-43 1 1 s 17 14 ms 654 5 ms
Idle-0 226 1 s 23 3 ms 29513 191 us
Process tracker state: ACTIVE
Process tracking time: 30 seconds
Total % Time Since Times Max
Process Name Priority Time CPU Last Ran Ran Time
--------------------+----------+--------+-----+-----------+----------+-------
Hardware Mgmt-7 193 789 ms 7 152 ms 11323 190 us
Idle-3 1 2 s 21 227 us 113407 98 us
Idle-1 226 3 s 27 324 us 54876 333 us
System Services-43 1 2 s 16 95 ms 1070 5 ms
Idle-0 226 3 s 24 269 us 54928 203 us
Process tracker state: ACTIVE
Process tracking time: 30 seconds
Total % Time Since Times Max
Process Name Priority Time CPU Last Ran Ran Time
--------------------+----------+--------+-----+-----------+----------+-------
Hardware Mgmt-7 193 1 s 7 299 ms 16358 190 us
Idle-3 1 3 s 20 314 us 165339 103 us
Idle-1 226 4 s 27 233 us 80066 333 us
System Services-43 1 3 s 17 13 ms 1654 5 ms
Idle-0 226 4 s 24 339 us 80157 203 us
Process tracker state: ACTIVE
Process tracking time: 30 seconds
Total % Time Since Times Max
Process Name Priority Time CPU Last Ran Ran Time
--------------------+----------+--------+-----+-----------+----------+-------
Hardware Mgmt-7 193 878 ms 7 425 ms 12569 201 us
Idle-3 1 3 s 20 14 ms 127546 322 us
Idle-1 226 3 s 26 4 ms 61854 333 us
System Services-43 1 2 s 18 231 us 1399 5 ms
Idle-0 226 3 s 23 4 ms 61876 201 us
Process tracker state: ACTIVE
Process tracking time: 30 seconds
Total % Time Since Times Max
Process Name Priority Time CPU Last Ran Ran Time
--------------------+----------+--------+-----+-----------+----------+-------
Hardware Mgmt-7 193 658 ms 7 4 ms 9415 201 us
Idle-3 1 2 s 20 232 us 91654 322 us
Idle-1 226 2 s 26 321 us 44359 143 us
System Services-43 1 2 s 17 32 ms 977 5 ms
Idle-0 226 2 s 24 256 us 44368 180 us
Process tracker state: ACTIVE
Process tracking time: 30 seconds
Total % Time Since Times Max
Process Name Priority Time CPU Last Ran Ran Time
--------------------+----------+--------+-----+-----------+----------+-------
Hardware Mgmt-7 193 1 s 7 111 ms 14443 201 us
Idle-3 1 3 s 20 349 us 141578 322 us
Idle-1 226 4 s 26 267 us 68552 165 us
System Services-43 1 3 s 18 17 ms 1628 5 ms
Idle-0 226 3 s 23 372 us 68586 200 us
Process tracker state: ACTIVE
Process tracking time: 30 seconds
Total % Time Since Times Max
Process Name Priority Time CPU Last Ran Ran Time
--------------------+----------+--------+-----+-----------+----------+-------
Hardware Mgmt-7 193 747 ms 7 293 ms 10691 199 us
Idle-3 1 2 s 20 305 us 105253 287 us
Idle-1 226 3 s 26 317 us 50952 165 us
System Services-43 1 2 s 19 1 ms 1217 5 ms
Idle-0 226 2 s 23 232 us 51014 200 us
Process tracker state: ACTIVE
Process tracking time: 30 seconds
Total % Time Since Times Max
Process Name Priority Time CPU Last Ran Ran Time
--------------------+----------+--------+-----+-----------+----------+-------
Hardware Mgmt-7 193 1 s 7 435 ms 15717 199 us
Idle-3 1 3 s 20 311 us 157962 287 us
Idle-1 226 4 s 26 230 us 76497 165 us
System Services-43 1 3 s 18 19 ms 1822 5 ms
Idle-0 226 4 s 23 335 us 76572 203 us
Process tracker state: ACTIVE
Process tracking time: 30 seconds
Total % Time Since Times Max
Process Name Priority Time CPU Last Ran Ran Time
--------------------+----------+--------+-----+-----------+----------+-------
Hardware Mgmt-7 193 877 ms 7 48 ms 12575 192 us
Idle-3 1 2 s 21 4 ms 122411 287 us
Idle-1 226 3 s 26 4 ms 59198 145 us
System Services-43 1 2 s 17 233 us 1365 5 ms
Idle-0 226 3 s 24 4 ms 59232 333 us
Process tracker state: ACTIVE
Process tracking time: 30 seconds
Total % Time Since Times Max
Process Name Priority Time CPU Last Ran Ran Time
--------------------+----------+--------+-----+-----------+----------+-------
Hardware Mgmt-7 193 1 s 7 248 ms 17590 192 us
Idle-3 1 4 s 20 5 ms 172719 287 us
Idle-1 226 4 s 26 262 us 83557 145 us
System Services-43 1 3 s 18 363 us 1917 5 ms
Idle-0 226 4 s 23 222 us 83625 333 us
Process tracker state: ACTIVE
Process tracking time: 30 seconds
Total % Time Since Times Max
Process Name Priority Time CPU Last Ran Ran Time
--------------------+----------+--------+-----+-----------+----------+-------
Hardware Mgmt-7 193 965 ms 7 383 ms 13815 210 us
Idle-3 1 3 s 20 361 us 134549 114 us
Idle-1 226 4 s 26 395 us 65074 341 us
System Services-43 1 3 s 19 7 ms 1502 5 ms
Idle-0 226 3 s 23 309 us 65180 333 us
Process tracker state: ACTIVE
Process tracking time: 30 seconds
Total % Time Since Times Max
Process Name Priority Time CPU Last Ran Ran Time
--------------------+----------+--------+-----+-----------+----------+-------
Hardware Mgmt-7 193 726 ms 7 117 us 10400 210 us
Idle-3 1 2 s 20 4 ms 97937 304 us
Idle-1 226 3 s 26 4 ms 47313 341 us
System Services-43 1 2 s 19 11 ms 1204 5 ms
Idle-0 226 2 s 23 4 ms 47379 193 us
Process tracker state: ACTIVE
Process tracking time: 30 seconds
Total % Time Since Times Max
Process Name Priority Time CPU Last Ran Ran Time
--------------------+----------+--------+-----+-----------+----------+-------
Hardware Mgmt-7 193 1 s 7 40 ms 15703 210 us
Idle-3 1 3 s 20 305 us 146213 304 us
Idle-1 226 4 s 25 318 us 70638 341 us
System Services-43 1 3 s 20 79 ms 1904 5 ms
Idle-0 226 3 s 22 233 us 70758 194 us
Process tracker state: ACTIVE
Process tracking time: 30 seconds
Total % Time Since Times Max
Process Name Priority Time CPU Last Ran Ran Time
--------------------+----------+--------+-----+-----------+----------+-------
Hardware Mgmt-7 193 825 ms 7 119 ms 11814 190 us
Idle-3 1 2 s 19 305 us 108942 304 us
Idle-1 226 3 s 25 317 us 52668 147 us
System Services-43 1 2 s 22 64 ms 1487 5 ms
Idle-0 226 3 s 22 232 us 52733 196 us
Process tracker state: ACTIVE
Process tracking time: 30 seconds
Total % Time Since Times Max
Process Name Priority Time CPU Last Ran Ran Time
--------------------+----------+--------+-----+-----------+----------+-------
Hardware Mgmt-7 193 1 s 7 213 ms 16833 192 us
Idle-3 1 3 s 19 313 us 159806 304 us
Idle-1 226 4 s 25 231 us 77333 147 us
System Services-43 1 3 s 21 32 ms 2181 5 ms
Idle-0 226 4 s 22 336 us 77437 198 us
DL1-103#
DL1-103# no process-tracking
Process-tracking stopped
DL1-103# show cpu
29 percent busy, from 127 sec ago
1 sec ave: 24 percent busy
5 sec ave: 29 percent busy
1 min ave: 32 percent busy
DL1-103# show cpu
24 percent busy, from 1 sec ago
1 sec ave: 24 percent busy
5 sec ave: 26 percent busy
1 min ave: 32 percent busy
DL1-103# show cpu
24 percent busy, from 1 sec ago
1 sec ave: 24 percent busy
5 sec ave: 23 percent busy
1 min ave: 32 percent busy
DL1-103# show cpu
17 percent busy, from 1 sec ago
1 sec ave: 17 percent busy
5 sec ave: 22 percent busy
1 min ave: 31 percent busy
DL1-103# show cpu
17 percent busy, from 1 sec ago
1 sec ave: 17 percent busy
5 sec ave: 21 percent busy
1 min ave: 31 percent busy
DL1-103# show cpu
18 percent busy, from 2 sec ago
1 sec ave: 18 percent busy
5 sec ave: 18 percent busy
1 min ave: 31 percent busy
DL1-103# show cpu
15 percent busy, from 9 sec ago
1 sec ave: 11 percent busy
5 sec ave: 13 percent busy
1 min ave: 28 percent busy
DL1-103# show cpu
11 percent busy, from 2 sec ago
1 sec ave: 11 percent busy
5 sec ave: 11 percent busy
1 min ave: 28 percent busy
DL1-103# show cpu
16 percent busy, from 4 sec ago
1 sec ave: 16 percent busy
5 sec ave: 15 percent busy
1 min ave: 27 percent busy
DL1-103# show cpu
16 percent busy, from 1 sec ago
1 sec ave: 16 percent busy
5 sec ave: 16 percent busy
1 min ave: 26 percent busy
DL1-103# show cpu
13 percent busy, from 80 sec ago
1 sec ave: 14 percent busy
5 sec ave: 14 percent busy
1 min ave: 13 percent busy
DL1-103# show cpu
13 percent busy, from 27 sec ago
1 sec ave: 15 percent busy
5 sec ave: 15 percent busy
1 min ave: 14 percent busy
DL1-103# show cpu
7 percent busy, from 160 sec ago
1 sec ave: 48 percent busy
5 sec ave: 49 percent busy
1 min ave: 6 percent busy
What I noticed is that with CPU at 34% on average the prompt was very laggy, with CPU at 14% (or lower) on average the CLI lagginess is difficult to notice (at least typing slowly)...the test I did is typing: show vvvvvvvvvvvvvvvvvvvvvvvvv at some point you can't stop v to be printed at prompt even if I stopped to press the v key on the keyboard 7 or 8 seconds before, the very same doing a deletion of those letters...just to see how fast is the prompt...I would say it prints jerkily (it's not fluid) at prompt.
Maybe there is a background process which is slamming the Aruba 2530's CPU.