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MQSeries.net Forum IndexGeneral IBM MQ SupportSYSTEM.ADMIN.COMMAND.EVENT queue getting filled up

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mqusr
PostPosted: Mon Apr 02, 2018 10:18 am Post subject: SYSTEM.ADMIN.COMMAND.EVENT queue getting filled up Reply with quote

Newbie

Joined: 24 Feb 2018
Posts: 8

Hi All,

I have enabled command event in my queue manager by setting CMDEV to enabled for the queue manager. What i observe is SYSTEM.ADMIN.COMMAND.EVENT queue now has messages and a certain queue depth. However, what I observe is that the queue depth of this queue is constantly increasing even without any activities being performed.

My query is - Is it normal for this queue depth to keep on increasing? What happens when it reaches the max queue depth (5000)? Is there any impact on the MQ system - does it hang or stop or crash if this queue reaches it limit? Is it mandatory to read these messages in case the event is enabled?

Similarly, I have also enabled config event by setting CONFIGEV to enabled. But I have not observed such a behavior of SYSTEM.ADMIN.CONFIG.EVENT queue.

Any help will be really appreciated.

Thanks,
mqusr
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bruce2359
PostPosted: Mon Apr 02, 2018 12:02 pm Post subject: Reply with quote

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Joined: 05 Jan 2008
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Moved to General forum
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bruce2359
PostPosted: Mon Apr 02, 2018 12:10 pm Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
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Location: US: west coast, almost. Otherwise, enroute.

MQ provides a set of so-called 'instrumentation event queues.' If you enable the event type, and the event occurs, then the qmgr will put an event message in the associated queue.

No harm if the queue fills up.

MQ installation does not provide tooling to process these messages.

For the command event queue, if you issue no MQSC (or equivalent) commands, then you will see no messages in the command event queue.
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Vitor
PostPosted: Mon Apr 02, 2018 12:14 pm Post subject: Reply with quote

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Joined: 11 Nov 2005
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Location: Ohio, USA

bruce2359 wrote:
No harm if the queue fills up.


Well apart from the non arrival of later messages.
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bruce2359
PostPosted: Mon Apr 02, 2018 12:51 pm Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
Posts: 8077
Location: US: west coast, almost. Otherwise, enroute.

Vitor wrote:
bruce2359 wrote:
No harm if the queue fills up.


Well apart from the non arrival of later messages.


If one asks for event messages, one must plan for, and then take action when these event messages arrive on the event queue.
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PeterPotkay
PostPosted: Mon Apr 02, 2018 4:33 pm Post subject: Re: SYSTEM.ADMIN.COMMAND.EVENT queue getting filled up Reply with quote

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Joined: 15 May 2001
Posts: 7432

mqusr wrote:
I have enabled command event in my queue manager by setting CMDEV to enabled for the queue manager. What i observe is SYSTEM.ADMIN.COMMAND.EVENT queue now has messages and a certain queue depth. However, what I observe is that the queue depth of this queue is constantly increasing even without any activities being performed.

Rest assured that activities are being performed. If only you had some messages that described these events that are occurring...
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mqusr
PostPosted: Mon Apr 02, 2018 10:28 pm Post subject: Reply with quote

Newbie

Joined: 24 Feb 2018
Posts: 8

Thanks All.

Is there any standard method of using these events for monitoring?

I am aware of the amqsevt.exe sample program to read these messages.
But other than this, what should be the way/process of using/consuming this data in the event queues.

regards,
mqusr
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bruce2359
PostPosted: Tue Apr 03, 2018 4:21 am Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
Posts: 8077
Location: US: west coast, almost. Otherwise, enroute.

Become familiar with Google to search for answers to your questions.

Go to google. Search for 'how to process mq event messages'.
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fjb_saper
PostPosted: Tue Apr 03, 2018 8:30 pm Post subject: Reply with quote

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Joined: 18 Nov 2003
Posts: 19702
Location: LI,NY

bruce2359 wrote:
MQ provides a set of so-called 'instrumentation event queues.' If you enable the event type, and the event occurs, then the qmgr will put an event message in the associated queue.

No harm if the queue fills up.

MQ installation does not provide tooling to process these messages.

For the command event queue, if you issue no MQSC (or equivalent) commands, then you will see no messages in the command event queue.


Be aware however that MQExplorer and some monitoring software may issue PCF messages to request information from the queue manager. This traffic will be captured by the event setup and sent to the event queue. And MQExplorer is quite chatty!
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