[rrd-users] Re: Monitoring LocIfInputQueueDrops

[Gellatly, Laurie]

Hi.
Because you are using COUNTER, RRDTool tries to show you the value per
second over
the period. Your period is defaulted to 300 seconds. Your value is 128.
128/300 = .4666
and it is that number you should see in your rrd. In OverTime, I use GAUGE
for 
error rates and provide an axis label saying the these are the number of
errors
per period. For this to work, error counters need to have the difference
taken
from the end to the start of each period befor being passed into RRDTool. 
I think this is a nicer way to show low value 'bursty' numbers. When
the majority of the time the values are truly 0 and when there are errors,
then they
show up clearly.

Hope this helps explain things.

                   ...Laurie :{)

-----Original Message-----
From: Shaun Nicholson [mailto:Shaun.Nicholson at kp.org]
Sent: Friday, 1 September 2000 5:58
To: rrd-users
Subject: [rrd-users] Monitoring LocIfInputQueueDrops


Helllllppp

I am trying to monitor the following MIB variables
.1.3.6.1.4.1.9.2.2.1.1.26.2 and .1.3.6.1.4.1.9.2.2.1.1.27.2.
These are LocIfInputQueueDrops and LocIfOutputQueueDrops on a serial
interface IFNumber .2. 
Now I can get the readings from the Router MIB interface like so.
I get the following output on my Sun Box
# snmpget 192.168.183.78 public .1.3.6.1.4.1.9.2.2.1.1.26.2
Name:
.iso.org.dod.internet.private.enterprises.cisco.local.linterfaces.lifTable.l
ifEntry.locIfInputQueueDrops.2 -> INTEGER: 0
# snmpget 192.168.183.78 public .1.3.6.1.4.1.9.2.2.1.1.27.2
Name:
.iso.org.dod.internet.private.enterprises.cisco.local.linterfaces.lifTable.l
ifEntry.locIfOutputQueueDrops.2 -> INTEGER: 128
# 

However the 128 does not appear in my RRD as 128. I am using the following
to build the RRD

rrdtool create /usr/local/apache/htdocs/rrds/Router1-Serial0-0-IFQDrops.rrd
\
DS:input:COUNTER:600:U:U \
DS:output:COUNTER:600:U:U \
RRA:AVERAGE:0.5:1:600 \
RRA:AVERAGE:0.5:6:700 \
RRA:AVERAGE:0.5:24:775 \
RRA:AVERAGE:0.5:288:797 \
RRA:MAX:0.5:1:600 \
RRA:MAX:0.5:6:700 \
RRA:MAX:0.5:24:775 \
RRA:MAX:0.5:288:797

and I write to the RRD with the following script lines that run every 5
minutes

    input=`snmpget 192.168.183.78 DCE122r .1.3.6.1.4.1.9.2.2.1.1.26.2 | awk
'{print $5}'`
   output=`snmpget 192.168.183.78 DCE122r .1.3.6.1.4.1.9.2.2.1.1.27.2 | awk
'{print $5}'`
rrdtool update /usr/local/apache/htdocs/rrds/Router1-Serial0-0-IFQDrops.rrd
N:$input:$output

I think my problem is something to do with interger and the COUNTER DS
setting but I dont know I'm only guessing.
Any one doing this or even better anyone know how to do this.

Thanks
Shaun Nicholson

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