04-06-2009 01:51 AM - edited 03-06-2019 05:01 AM
Hi,
We have this 4500 switch which shows high usage at some times..when further checked the majority of usage,near 60%, is done by
this factor: Cat4k Mgmt LoPri .
Can anyone help as to why this is occuring & how to solve this further? Checked cisco site for details..but it doesnt say actually the cause.
Thanks.
04-06-2009 04:04 AM
Hi,
take a look at following page:
http://www.cisco.com/en/US/products/hw/switches/ps663/products_tech_note09186a00804cef15.shtml
HTH,
Dario
04-09-2009 07:25 PM
How is the output for following cpu usage read?
6161616161616161616161616161616161616161616161616161616161
3432724832423443424642324242434242423332423452434542524242
100
90
80
70 * * *
60 * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
50 * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
40 * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
30 * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
20 * * * *** * * * * *** * * * * * * * * * * * * * *** * * *
10 ##########################################################
0....5....1....1....2....2....3....3....4....4....5....5....
0 5 0 5 0 5 0 5 0 5
CPU% per minute (last 60 minutes)
* = maximum CPU% # = average CPU%
__________
what do the no. on the x axis denote & how are they to be read along with the usage.Should more attention be paid on the 60 min data or the 60 seconds data for analysis?
Thanks!
04-09-2009 11:38 PM
The output shows the average CPU% per minute of the last 60 minutes.
X axis is the CPU%, Y axis is time.
The 2 upper rows give you the CPU percentage of that minute
6
3
means 63 CPU%
minute 1: CPU% 63
minute 2: CPU% 14
minute 3: CPU% 63
minute 4: CPU% 12
minute 5: CPU% 67
etc...
The 2 lower lines give the time
6161616161616161616161616161616161616161616161616161616161
3432724832423443424642324242434242423332423452434542524242
100
90
80
70 * * *
60 * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
50 * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
40 * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
30 * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
20 * * * *** * * * * *** * * * * * * * * * * * * * *** * * *
10 ##########################################################
0....5....1....1....2....2....3....3....4....4....5....5....
..........0....5....0....5....0....5....0....5....0....5....
0 minutes....5minutes...10minutes....
* means the Max CPU% of that minute, # means the average CPU% of that minute.
For analis, you should take the longer period, like minutes or 5 minutes. When you take seconds, you will get a snapshot of a moment, which could lead to incorrect conclusions.
It seems you average over the period of an hour is 10% and is very stable.
HTH,
Dario
04-10-2009 08:27 AM
Thanks for this great info...
You say the avg use is 10% for over an hour, but if seen wrt the output each minutes it seems the usage was like 40,50 and goes upto 70% every time period here.
How could we define that?
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