[openamq-dev] queue_bind, size and consume/cancel

[Pieter Hintjens]

Yes, that's a good solution. Sanity checks. Martin, maybe we should
open a jira for bugs and suggestions...?

On 11/10/07, Dmitri Tsyganov <dmitri.tsyganov at dowjones.com> wrote:
> Thanks, I forgot about amq_server_base.cfg!
>
> I think that would be nice if it can check if "kill" < "trim" and set
> "kill" to trim + 1 (or something, maybe +10%).
>
> Dmitri
>
> On Fri, 2007-11-09 at 22:46 +0100, Martin Sustrik wrote:
> > Dmitri,
> >
> > > Looks like when I set "trim" size limit, the "kill" limit is still there
> > > and it is set to 50K or so. So when I set trim limit to 70K, without
> > > specifying "kill" size - my queue gets killed when it reaches the size
> > > of 50K. If I set "warn", "trim" and "kill" (although kill is kinda
> > > redundant here :) ) - everything works - queue gets trimmed at my "trim"
> > > limit!
> >
> > Actually, this is not a bug. It is a feature! And a counter-intuitive
> > one indeed :)
> >
> > Let me explain.
> >
> > Each queue profile can define several actions. That way you can can warn
> > when the number of messages in queue exceeds 10000 and kill the queue
> > when it goes over 50000.
> >
> > So far so good.
> >
> > Now, the profile you've wrote (amq_server.cfg) inherits the defaults
> > from amq_server_base.cfg.
> >
> > amq_server_base.cfg defines the limits in the following way:
> >
> >          <limit name = "warn" value = "10000" />
> >          <limit name = "kill" value = "50000" />
> >
> > amq_server.cfg defines them as follows:
> >
> >          <limit name = "trim" value = "70000" />
> >
> > After inheritance is done, the list of actions looks like this:
> >
> >          <limit name = "warn" value = "10000" />
> >          <limit name = "kill" value = "50000" />
> >          <limit name = "trim" value = "70000" />
> >
> > So the broker warns at 10000 messages in queue, kills it at 50000 and
> > starts trimming it at 70000 (purely hypothetical case of course given
> > that the queue is killed at 50000).
> >
> > As I said, it's highly counter-intuitive, but it is a feature.
> >
> > Maybe we should redesign is somehow to make it more user-friendly.
> >
> > Martin
> > _______________________________________________
> > openamq-dev mailing list
> > openamq-dev at lists.openamq.org
> > http://lists.openamq.org/mailman/listinfo/openamq-dev
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>
>


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