Re: [Nagios-devel] Max concurrent checks - spreading the next_time
Posted: Mon Jun 15, 2009 3:16 pm
Doesn't auto-reschedule smooth this out a bit?
________________________________________
From: Hiren Patel [[email protected]]
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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Original poster: iren Patel [[email protected]
________________________________________
From: Hiren Patel [[email protected]]
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.
---------------------------------------------------------------------------=
---
Crystal Reports - New Free Runtime and 30 Day Trial
Check out the new simplified licensing option that enables unlimited
royalty-free distribution of the report engine for externally facing
server and web deployment.
http://p.sf.net/sfu/businessobjects
_______________________________________________
Nagios-devel mailing list
[email protected]
https://lists.sourceforge.net/lists/lis ... gios-devel
NOTICE: This email message is for the sole use of the intended recipient(s=
) and may contain confidential and privileged information. Any unauthorized=
review, use, disclosure or distribution is prohibited. If you are not the =
intended recipient, please contact the sender by reply email and destroy al=
l copies of the original message.
This post was automatically imported from historical nagios-devel mailing list archives
Original poster: iren Patel [[email protected]