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Missing data for an element - what are the possible reasons?

justty over 14 years ago

I have been asked by my CIO to figure out why various resources stop collecting data for random periods of time.

I have an answer for the 2 small gaps on the E: drive. One was related to the Orion 9.5 upgrade that went wrong and the other is when the orion server crashed.

The screen shot is from the same server. As you can see data was collected for E: statistics, but not for physical memory. I am unable to explain the large gap on the physical memory for this server. We don't review every server until our custom Month-End VBS script gathers all the graphs and posts the PDF's out to the ORION server.

I need to explain to him the possible reasons for the gap.

I have another server that I am seeing the same gap on, but for a different date range.

0 MarieB over 14 years ago

Hi justty--
I'll mark this one for the product manager. Question, have you opened a support ticket for this problem yet?
M
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0 bshopp over 14 years ago

What are the specs of your Orion box, what other modules do you own and how many network elements are you polling? Typically this is due to overloading the poller you will see gaps in data.
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0 justty over 14 years ago in reply to bshopp

Server:
(1) Quad 2.3GHz w/ 2GB memory
Orion:
9.5 sp4 NPM SL500, 3.0 sp4 NTA SL500, 3.0 sp1 APM SL250
Network Elements 459
Nodes 100
Interfaces 166
Volumes 193
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0 bshopp over 14 years ago in reply to justty

How many source netflow interfaces are you monitoring and are you using the full SL250 on APM?
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0 justty over 14 years ago in reply to bshopp

APM 60
NTA - Where do I find that number at?
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0 bshopp over 14 years ago in reply to justty

Go to the top of the NTA summary view and look at Netflow Sources and you should see a number of interfaces there
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0 justty over 14 years ago in reply to bshopp

If I am looking at the correct screen, we are monitoring 31 ports.
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0 bshopp over 14 years ago in reply to justty

Did you mention is SQL on the same box as Orion or a different box? If the answer is different box, I think at this point many of the usual suspects which could cause this we have looked at and it might be time to open a support ticket.
Also, for future reference here is our baseline specs for average customers we recommend for Orion, see here. Obviously this could vary depending on size and how many modules you own etc. but this is a good baseline for most users.
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0 NinjaNerd56 over 14 years ago in reply to bshopp

I got a similar call from our COO this morning, looking at a key server's stats. Here's what we seeing:

His question was "what are the gaps; are we missing data?"
I don't see a lot of outstanding ICMP or SNMP polls, and I've done Poller Tuning, so this is a mystery. Also, the Orion Pollers are local to the servers, so latency is not a factor.
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Network Elements	459
Nodes	100
Interfaces	166
Volumes	193