What is the shortest intervals for monitoring?

[TheCooDave]

Hi,

We setup a dashlet to monitor memory and CPU usage on a critical server. We want this to be close to real time as possible because in a 30 second window we could be missing stuff in the logs for a spike or something (for example).

Could you set almost real time on a server or what is the shortest I can use and how do I apply this setting?

[sgardil]

Hi,

We setup a dashlet to monitor memory and CPU usage on a critical server. We want this to be close to real time as possible because in a 30 second window we could be missing stuff in the logs for a spike or something (for example).

Could you set almost real time on a server or what is the shortest I can use and how do I apply this setting?

Are you using the metrics overview dashlet to monitor this? Currently there is a refresh of the data on loading the dashboard and then a general 5 minute reload if you leave the page open. You could go in the code and modify it to refresh on a shorter period but there is some draw backs to performance if you were to do this.

[kg2857]

Basically, one minute.
I looked into less than one minute intervals some time back, and its pretty impractical in my opinion.
You can change it in nagios.cfg, but as I see it other things are dependent on it and things may get weird. I suggest you read the cfg file and docs.

[TheCooDave]

Oh, thanks, I was hoping for like 10 seconds or something like this for a select item.

[kg2857]

I'd advise you to do your research on this rather than believing me. I trust me but that doesn't mean you should.

[TheCooDave]

er...ok, thanks...

[vedicsystems]

Yep, sub-minute intervals are tricky to pull off cleanly.