Re: [rrd-users] Question on correct data type

permalink · #1 (**permalink**) 04-17-2007

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> I can't tell you what's going on with that counter. I don't imagine
> the appliance has 4 million objects currently open, so that number
> looks like nonsense. Google to look for an issue specific to the
> appliance vendor, and if you don't see anything, contact the vendor
> directly. It's not uncommon for there to be bugs in an SNMP data
> model.

Sam,

Thanks for your help. I am going to contact the vendor, as I believe
something is quite wrong. Not only is that counter not functioning prop=
erly
for a counter, but unless I'm missing something, I don't believe a coun=
ter
is the best choice of types to monitor an object that fluctuates so muc=
h by
design.

Thanks,
Jeff

=

"Sam Umbach" =

<sumbach@gmail.co =

m> =
To
Jeffrey =

04/16/2007 08:14 Petter/EMPL/NY/Verizon@VZNotes =

PM =
cc
rrd-users@lists.oetiker.ch =

Subj=
ect
Re: [rrd-users] Question on corr=
ect
data type =

=

=

=

=

=

=

> Maybe this is just showing my ignorance, but has anyone ever experie=
nced
a
> counter that fluctuates like this? If so, what have you found to be t=
he
best
> way to handle it in RRDtool? I have tried counter, and guage....and o=
ut
of
> desperation tried absolute...none of which really depicted what I
expected.
>
> Has anyone experienced fluctuating counters? Are they common? How do=
you
> handle them?

Jeff,

I can't tell you what's going on with that counter. I don't imagine
the appliance has 4 million objects currently open, so that number
looks like nonsense. Google to look for an issue specific to the
appliance vendor, and if you don't see anything, contact the vendor
directly. It's not uncommon for there to be bugs in an SNMP data
model.

If you want to graph the delta (in objects opened/closed per second),
you should use the DERIVE data source type. That will subtract the
new counter value from the old counter value and divide by the number
of seconds between the data points. If you want to display the actual
counter value, use the ABSOLUTE data source type. I can't tell you if
either of these is an appropriate interpretation of the data; you'll
have to work with the vendor to work that out.

-Sam

=

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<html><body>
> I can't tell you what's going on with that counter. I don't im=
agine 
> the appliance has 4 million objects currently open, so that number=
 
> looks like nonsense. Google to look for an issue specific to the<=
br>
> appliance vendor, and if you don't see anything, contact the vendo=
r 
> directly. It's not uncommon for there to be bugs in an SNMP data<=
br>
> model. 
 
Sam, 
 
Thanks for your help. I am going to contact the vendor, as I believe so=
mething is quite wrong. Not only is that counter not functioning proper=
ly for a counter, but unless I'm missing something, I don't believe a c=
ounter is the best choice of types to monitor an object that fluctuates=
so much by design. 
 
Thanks, 
Jeff 
<img width=3D"16" height=3D"16" src=3D"cid:1__=3D0ABBF853DFD1E6538f9e8a=
9@CORE.VERIZON.COM" border=3D"0" alt=3D"Inactive hide details for &quot=
;Sam Umbach" <sumbach@gmail.com>">"Sam Umbach" &lt=
;sumbach@gmail.com> 
 
 

<table width=3D"100%" border=3D"0" cellspacing=3D"0" cellpadding=3D"0">=

<tr valign=3D"top"><td style=3D"background-image:url(cid:2__=3D0ABBF853=
DFD1E6538f9e8a9@CORE.VERIZON.COM); background-repeat: no-repeat; " widt=
h=3D"40%">
<ul>
<ul>
<ul>
<ul>"Sam Umbach" <sumbach@gmail.com&gt=
; 
04/16/2007 08:14 PM</ul>
</ul>
</ul>
</ul>
</td><td width=3D"60%">
<table width=3D"100%" border=3D"0" cellspacing=3D"0" cellpadding=3D"0">=

<tr valign=3D"top"><td width=3D"1%" valign=3D"middle"><img width=3D"58"=
height=3D"1" src=3D"cid:3__=3D0ABBF853DFD1E6538f9e8a9@CORE.VERI ZON.COM=
" border=3D"0" alt=3D""> 
<div align=3D"right">To</div></td><td width=3D"=
100%"><img width=3D"1" height=3D"1" src=3D"cid:3__=3D0ABBF853DFD1E6538f=
9e8a9@CORE.VERIZON.COM" border=3D"0" alt=3D""> 
Jeffrey Petter/EMPL/NY/Verizon@VZNotes</td></tr=
>

<tr valign=3D"top"><td width=3D"1%" valign=3D"middle"><img width=3D"58"=
height=3D"1" src=3D"cid:3__=3D0ABBF853DFD1E6538f9e8a9@CORE.VERI ZON.COM=
" border=3D"0" alt=3D""> 
<div align=3D"right">cc</div></td><td width=3D"=
100%"><img width=3D"1" height=3D"1" src=3D"cid:3__=3D0ABBF853DFD1E6538f=
9e8a9@CORE.VERIZON.COM" border=3D"0" alt=3D""> 
rrd-users@lists.oetiker.ch</td></tr>

<tr valign=3D"top"><td width=3D"1%" valign=3D"middle"><img width=3D"58"=
height=3D"1" src=3D"cid:3__=3D0ABBF853DFD1E6538f9e8a9@CORE.VERI ZON.COM=
" border=3D"0" alt=3D""> 
<div align=3D"right">Subject</div></td><td widt=
h=3D"100%"><img width=3D"1" height=3D"1" src=3D"cid:3__=3D0ABBF853DFD1E=
6538f9e8a9@CORE.VERIZON.COM" border=3D"0" alt=3D""> 
Re: [rrd-users] Question on correct data type</=
td></tr>
</table>

<table border=3D"0" cellspacing=3D"0" cellpadding=3D"0">
<tr valign=3D"top"><td width=3D"58"><img width=3D"1" height=3D"1" src=3D=
"cid:3__=3D0ABBF853DFD1E6538f9e8a9@CORE.VERIZON.CO M" border=3D"0" alt=3D=
""></td><td width=3D"336"><img width=3D"1" height=3D"1" src=3D"cid:3__=3D=
0ABBF853DFD1E6538f9e8a9@CORE.VERIZON.COM" border=3D"0" alt=3D""></td></=
tr>
</table>
</td></tr>
</table>
 
<tt>>  Maybe this is just showing my ignorance, but has anyone =
ever experienced a 
> counter that fluctuates like this? If so, what have you found to b=
e the best 
> way to handle it in RRDtool? I have tried counter, and guage....an=
d out of 
> desperation tried absolute...none of which really depicted what I =
expected. 
> 
>  Has anyone experienced fluctuating counters? Are they common=
? How do you 
> handle them? 
 
Jeff, 
 
I can't tell you what's going on with that counter.  I don't imagi=
ne 
the appliance has 4 million objects currently open, so that number 
looks like nonsense.  Google to look for an issue specific to the<=
br>
appliance vendor, and if you don't see anything, contact the vendor =

directly.  It's not uncommon for there to be bugs in an SNMP data<=
br>
model. 
 
If you want to graph the delta (in objects opened/closed per second),<b=
r>
you should use the DERIVE data source type.  That will subtract th=
e 
new counter value from the old counter value and divide by the number<b=
r>
of seconds between the data points.  If you want to display the ac=
tual 
counter value, use the ABSOLUTE data source type.  I can't tell yo=
u if 
either of these is an appropriate interpretation of the data; you'll<br=
>
have to work with the vendor to work that out. 
 
-Sam 
 
</tt> 
</body></html>=

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