Hi!
Due to demand of new features I upgraded Cisco3662AC router from 12.2 GD release to the last 12.3 GD and obvserved that after a period of working cpu usage grows to ~80-90%. The cause is TTY background process. This is output:
C3662#sh proc cpu sorted
CPU utilization for five seconds: 54%/5%; one minute: 58%; five minutes: 59%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
31 100164896 571915 175142 41.65% 48.77% 48.96% 0 TTY Background
139 26342840 29269424 900 4.92% 3.21% 3.29% 0 Encrypt Proc
138 52324 2734 19138 0.98% 0.07% 0.40% 227 SSH Process
9 8629872 250729 34419 0.73% 0.58% 0.59% 0 Serial Backgroun
65 860476 3106106 277 0.49% 0.12% 0.30% 0 IP Input
204 458948 18063687 25 0.08% 0.10% 0.07% 0 PPP Events
195 226308 2818961 80 0.08% 0.02% 0.04% 0 FR LMI
210 190696 452551 421 0.08% 0.03% 0.01% 0 SNMP ENGINE
206 122012 35909153 3 0.08% 0.04% 0.04% 0 traffic_shape
208 133896 928202 144 0.08% 0.02% 0.00% 0 IP SNMP
47 61212 134496 455 0.08% 0.03% 0.02% 0 Compute load avg
10 32 11196 2 0.00% 0.00% 0.00% 0 IPC Dynamic Cach
11 0 1 0 0.00% 0.00% 0.00% 0 IPC Zone Manager
12 6520 572008 11 0.00% 0.00% 0.00% 0 IPC Periodic Tim
15 0 20 0 0.00% 0.00% 0.00% 0 AAA high-capacit
13 6200 572017 10 0.00% 0.00% 0.00% 0 IPC Deferred Por
17 100 22373 4 0.00% 0.00% 0.00% 0 Environmental mo
14 0 1 0 0.00% 0.00% 0.00% 0 IPC Seat Manager
19 82520 349044 236 0.00% 0.00% 0.00% 0 ARP Input
16 0 1 0 0.00% 0.00% 0.00% 0 OIR Handler
21 156 7518 20 0.00% 0.00% 0.00% 0 DDR Timers
I tried the recomandation posted on site (no syncronous logging) but it does not help.
I also tried to change software several times (12.3. GD releases) but result is the same.
Bugtrack show that this type of behaivor was corrected long time ago but it seems that it is still not corrected.
What can I do else to avoid this problem?
Thanks
