Mailing-List: contact users-help@activemq.apache.org; run by ezmlm
Precedence: bulk
Reply-To: users@activemq.apache.org
Received-SPF: pass (athena.apache.org: domain of christian.posta@gmail.com
 designates 209.85.215.47 as permitted sender)
MIME-Version: 1.0
In-Reply-To: 
 <CABOBwRgU4t0c76YJ6yU=_yr-jBMu4TnwwbmUO50iFMPCswcHfA@mail.gmail.com>
References: 
 <CABOBwRgU4t0c76YJ6yU=_yr-jBMu4TnwwbmUO50iFMPCswcHfA@mail.gmail.com>
Date: Wed, 4 Sep 2013 14:16:11 -0700
Message-ID: 
 <CAKS7T5OA_PTDAVSDPsFBwoGGas9X3zSMr71Kob1ueoMPvd5LBg@mail.gmail.com>
Subject: Re: About JMX counters
From: Christian Posta <christian.posta@gmail.com>
To: "users@activemq.apache.org" <users@activemq.apache.org>
Content-Type: multipart/alternative; boundary=089e011827ae922d5d04e59550b5

--089e011827ae922d5d04e59550b5
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

Inline....


On Wed, Sep 4, 2013 at 6:13 AM, Jose Mar=EDa Zaragoza <demablogia@gmail.com=
>wrote:

> Hi:
>
> I'm using ActiveMQ 5.8 and I'm having a look to JMX counters
> I only use topics as destination
>
> I've got a questions:
>
> 1)
>
> ExpiredCount is always 0,  in spite of I send all the messages with
> TTL flag ( 15000 ms a.k.a 15 s)
>
> MessageProducer producer =3D session.createProducer(destination);
> producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
> producer.setTimeToLive(15000);
>
> What is shown by this counter ?
> Can I be sure that message are expired ?
>

Give a look to the individual subscriptions and not the topic itself.


>
>
>
> 2) MemoryUsagePortion is always 1.0  ,
>
> what does it mean ?
>
usage portion is always about parent-child relationship. So a subscription
using "1.0" will use 100% of it's allocation in the parent.


>
>
> 3) Sometimes I've observed counters with a negative value , how is
> this possible ?
> For example:   EnqueueCount with -4
>
Take a look here: EnqueueCount is a temporal value, ie, it's related only
to when the broker was started. check here:
http://activemq.apache.org/how-do-i-find-the-size-of-a-queue.html


>
> Can I trust in these counters ?  Which one are reliable ?
>
> 4)  What are the most important counters for watching them ( in
> performace terms ) ?
>
>
> Thanks and regards
>


--=20
*Christian Posta*
http://www.christianposta.com/blog
twitter: @christianposta

--089e011827ae922d5d04e59550b5--