It happens to all alerts, does not matter if it is derived from a template, or directly defined for a resource.

f.e. I had to define an alert for the postgres servers on the number of open files. This is defined as [Metric value threshold (Open file descriptors) > 10000]
Dempening settings: Time period: 1 Occurence in 1 Hour.

I receive all alerts in every 10 minutes. I have also tried other dampening methods, but none worked for me.

Attila


2013/11/27 Jay Shaughnessy <jshaughn@redhat.com>

No, all of the metric conditions should use dampening just fine.  Availability is a bit different because of the way we only signal changes in availability and don't supply a constant stream of availability (this is for efficiency).  But metrics are reported as scheduled, whether the value changes or not.

Does this happen only when the alert definition is derived from a template?  If you define the exact same alert def at the resource level does the dampening work?  That would be very strange but I'm just checking.

Can you post the exact alert def conditions and the dampening rule you have in effect.


On 11/27/2013 10:38 AM, Attila Heidrich wrote:
Hi!

Thanks a lot, it does help me to understand things! My problem may be rooted in the concept of "discrete events"!
anyway... is it possible, that the alert "process CPU consumption (percent) is higher than a given value" is affected by "being a discrete event"? I receive all alerts in every 20 minutes (or whatever the measurement interval is).

The templates are itemized correctly!

Regards,

Attila


2013/11/27 Jay Shaughnessy <jshaughn@redhat.com>

Hi Attila, two things.  First, what type of alert conditions are you using?  Certain conditions, most notably Availability conditions like GOES DOWN, ignore dampening because they are discrete events.  Second, there was a recent bug fix in the area of dampening.  The hourly data purge was negating some of the dampening state, so dampening that crossed the top of the hour may have been affected.  This fix will be in 4.10.

Do either of these things, maybe explain what you are seeing?

Also, you are saying that this is dampening at the alert template level?  Check to ensure the dampening is also reflected at the resource level by looking at the alert definition that was propagated down from the template to one of the resources of the relevant type.




On 11/27/2013 4:35 AM, Attila Heidrich wrote:
No one encounters similar? It is proven, that I can set anything in the dampening section, I will get each and every alerting mail! Very annoying, tbh...

What to chack if I set it correctly (I think there's nothing I can miss, it's quite simple - and I have also seen this work)? Or any log that should be correlated?

Attila



2013/11/8 Attila Heidrich <attila.heidrich@gmail.com>
Hi!

It seems that there's no use to set any dampening for the alert tamplates, I got all alerts for any of them.

I usually use "one for several hours"... practically I only use templates, so the servers inherits the settings.

Is there any trick I miss? I have used 4.8 only a few days long, but as far as I can remember, it worked as I expected.

Attila



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