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What causes Network Baselines to occur?

I am curious to know what the list of things are that can cause a Network Baseline to take place?

I ask because at least twice today I have seen a Network Baseline start and complete on their own. Historically I have only seen this take place when the system or components of the system were restarted.

Thanks in advance for any help on this!

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Accepted answers

bshopp

From page 93 of the Admin guide:

Calculating a Baseline

On a new install or after a shutdown, when the SolarWinds Network Performance Monitor service starts, there is no current network data in your Orion database. In this situation, by default, Orion NPM calculates a baseline for the transmission rates of the various elements of your network. To calculate this baseline, all network resources are polled immediately upon startup, and then, as soon as the initial poll is complete, the network is polled again. The resulting two sets of data are used to calculate a nearly instant baseline view of your network performance.

If you do not need statistics immediately, or if you do not want Orion NPM to calculate a baseline at startup, disable baseline calculation at startup by setting the Baseline Calculation option on the Orion Polling Settings view to False. For more information, see “Configuring Polling Engine Settings” on page 89.

Note: Baseline calculation requires significant of data gathering and processing. Until baseline calculation is completed, both Orion NPM server performance and the CPU performance of some of network routers may be adversely affected.

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bshopp

From page 93 of the Admin guide:

Calculating a Baseline

byrona

Brandon

Thanks for this. I had read this but am now under the impression that something else may cause it to happen as well. The reason that I believe this is that our system has done at least two (yesterday) network baselines on it's own, no restart, no human intervention of any kind.

bshopp

Do you see anything in the events that indicate service restarts? I know you are on a couple other threads about some issues

byrona

No, that is the part I thought was weird. I even asked everybody else here if they did anything and of all the people that have access to the system, nobody touched it.... or I have a mole! = )

I guess I will just keep an eye on it since I don't see that it did it at all last night. It could also be related to the development patch we installed yesterday that your support engineers provided to help resolve our poller issue.

I will watch it and open a ticket if it continues to happen. I just wanted to verify that there weren't other things that cause the baseline to happen that may not have been mentioned in the manual before I gave it any further thought.

As always, thanks for your prompt responses!