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New Member

trying to understand cpu utilization

how bad is this?

A#sh processes cpu

CPU utilization for five seconds: 93%/36%; one minute: 90%; five minutes: 88

Im trying to uderstand the 90% and what they mean overall

8 REPLIES

Re: trying to understand cpu utilization

The 90 is the CPU utilization over the last 60 seconds. It looks like your router is using a lot of CPU cycles. Post the results of the following and maybe we can help.

show version

show proc cpu | excl 0.00%__0.00%__0.00%__

Re: trying to understand cpu utilization

Hi Richard,

one minute: 90% means the average cpu utilization over a 1 minute period.

The same applies to the five minutes:88% - cpu utilization over a 5 minute period.

These values are very high. Your box is working close to its limits.

Users can experience higher latency and more packet drops when this is happening.

You should look into what traffic is causing this.

Cheers:

Istvan

New Member

Re: trying to understand cpu utilization

A#show proc cpu | excl 0.00%__0.00%__0.00%_

CPU utilization for five seconds: 47%/19%; one minute: 46%; five minutes: 47%

PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process

4 1972144 394023 5005 0.00% 0.04% 0.05% 0 Check heaps

9 5048956 9633965 524 0.15% 0.14% 0.14% 0 ARP Input

33 1602612 59429 26966 0.55% 0.06% 0.00% 0 Per-minute Jobs

44 9032701881577385170 572 26.00% 28.05% 28.88% 0 IP Input

82 172 191 900 1.11% 0.16% 0.03% 66 Virtual Exec

this is the latest..

what is the comfort zone..60%?

Re: trying to understand cpu utilization

How about a show version too?

New Member

Re: trying to understand cpu utilization

A#sh ver

Cisco Internetwork Operating System Software

IOS (tm) C2600 Software (C2600-IPBASE-M), Version 12.3(6c), RELEASE SOFTWARE (fc

1)

Copyright (c) 1986-2004 by cisco Systems, Inc.

Compiled Tue 20-Jul-04 05:24 by kellythw

Image text-base: 0x80008098, data-base: 0x80ED06CC

ROM: System Bootstrap, Version 12.2(8r) [cmong 8r], RELEASE SOFTWARE (fc1)

A uptime is 5 weeks, 5 days, 13 hours, 45 minutes

System returned to ROM by reload at 02:49:49 UTC Thu Jan 3 2008

System restarted at 02:51:48 UTC Thu Jan 3 2008

System image file is "flash:c2600-ipbase-mz.123-6c.bin"

cisco 2621XM (MPC860P) processor (revision 0x301) with 126976K/4096K bytes of me

mory.

Processor board ID JAE08255X1W (1978396964)

M860 processor: part number 5, mask 2

Bridging software.

X.25 software, Version 3.0.0.

2 FastEthernet/IEEE 802.3 interface(s)

2 Serial network interface(s)

32K bytes of non-volatile configuration memory.

32768K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102

Re: trying to understand cpu utilization

Here's a good troubleshooting guide.

http://cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a00800a70f2.shtml

What's changed in your network? How long has this router been experiencing high CPU util? What interfaces are in use? How are you processing packets?

Super Bronze

Re: trying to understand cpu utilization

More of a concern is your high software process rate, which appears to be in IP input.

See http://cisco.com/en/US/products/hw/routers/ps359/products_tech_note09186a00801c2af3.shtml

New Member

Re: trying to understand cpu utilization

thx!...I just happend to issue the sho process cpu command and noticed the utilization..

I was playing with PRTG and was wondering

if it was causing a heavy load on the cpu and

i discovered this

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