Re: [Nagios-devel] Max concurrent checks - spreading the next_time

[Steven D. M. <sm...@ld...>]

Doesn't auto-reschedule smooth this out a bit?
________________________________________
From: Hiren Patel [hir...@gm...]
Sent: Monday, June 15, 2009 6:25 AM
To: Nagios Developers List
Subject: Re: [Nagios-devel] Max concurrent checks - spreading the next_time

Ton Voon wrote:
>> yip exactly the behavior you describe. I setup a standalone machine
>> running the default checks against itself, and the queue shows them
>> all scheduled for the same time the next minute. also the log
>> entries appear as you describe.
>
> Thanks for testing.
>
sure.


> That is correct current behaviour - this could happen if a service is
> scheduled at the same time as something else which is in the queue
> before it.
>
> I think this is poor behaviour, but it is a side effect of how this
> currently works.
>
agree.

>
> I've been thinking a lot about this problem and I think this
> functionality is poorly implemented. However I'd like some consensus
> before making a major change to how this part works.
>
> My thinking is that:
>    * if the limit is reached, add to the top of the event queue the
> "service reaper" event
>    * nagios will then loop between this new service reaper event and
> trying to execute the next service
>    * latency will go through the roof, but that is what you'd expect
> if you said "only 1 service check is executing at a time"
>
I don't know enough about the event queue and scheduling to comment on
this, but I agree that the most practical solution to seeing this issue
in the logs, is to increase the max concurrent checks.

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