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Message
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| gjohn |
 Posted: Thu May 22, 2008 7:30 am Post subject: MQ Queue connections |
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Newbie
Joined: 22 May 2008
Posts: 2
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I have few questions
1.Is it correct that each Queue Manager has only one listener?
2.Is there a limit on "Server Connection" channels that I can create
3.On a single "Server connection" how many Queue connections can be opened for PUT/GET
4.I use .net to connect to QM/Queues
I have dedicated connections to the Queues
ieMQQueue connection is established and used till a PUT/GET throws an exception
Once I see an exception I reconnect.
The question is every day the Queue Open Input/Output count is increasing and each day I see the count about 20 each for Input and Output.Why is the Queue Open Input/Output increasing? |
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| Vitor |
| Posted: Thu May 22, 2008 7:34 am Post subject: Re: MQ Queue connections |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| gjohn wrote: |
| 1.Is it correct that each Queue Manager has only one listener? |
Yes
| gjohn wrote: |
| 2.Is there a limit on "Server Connection" channels that I can create |
No
| gjohn wrote: |
| 3.On a single "Server connection" how many Queue connections can be opened for PUT/GET |
You don't connect to a queue, you connect to a queue manager. This connection allows you to open queues hosted by the queue manager. There must be a limit but I've never heard of an application hitting it.
The maximum number of connections allowed is configurable, and limited by machine resources in the last recourse.
| gjohn wrote: |
4.I use .net to connect to QM/Queues
I have dedicated connections to the Queues
ieMQQueue connection is established and used till a PUT/GET throws an exception
Once I see an exception I reconnect.
The question is every day the Queue Open Input/Output count is increasing and each day I see the count about 20 each for Input and Output.Why is the Queue Open Input/Output increasing? |
Because you never disconnect. Or close.
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Honesty is the best policy.
Insanity is the best defence. |
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| bower5932 |
| Posted: Thu May 22, 2008 7:35 am Post subject: |
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Jedi Knight
Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA
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| Can't you define multiple listeners for a single queue manager? |
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| Vitor |
| Posted: Thu May 22, 2008 7:40 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| bower5932 wrote: |
| Can't you define multiple listeners for a single queue manager? |
I believe so but you'd need an unusual reason to do so, especially in these modern days of threaded listeners. Given the poster's obvious level of experience, I gave the "conventional" answer.
Under most of those circumstances you'd be in an interesting network configuration which might push you in other ways anyway.
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Honesty is the best policy.
Insanity is the best defence. |
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| bruce2359 |
| Posted: Thu May 22, 2008 7:58 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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| Quote: |
| 1.Is it correct that each Queue Manager has only one listener? |
To support inbound channels, you will need (at least) one listener for each network protocol.
As an example: z/OS WMQ supports TCP/IP and LU6.2 protocols; therefore two listeners, one for TCP/IP channels, and one for LU6.2 channels.
Then there's NETBIOS and SPX...
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| gjohn |
| Posted: Thu May 22, 2008 9:12 am Post subject: |
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Newbie
Joined: 22 May 2008
Posts: 2
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For my question on Input/Output count increasing.
Following are my observation
1.I start my application I make 3 connections to the Queue and I see Input/Oputup count 3.When I shut down my Application I do close the Queue and QM and the Count goes back to 0.This is correct.
2.After a day I see the Input/Output count always around 20.
I am supposing there are network trouble and my Application reconnect to Queues after calling close on existing connection.
I believe when there is a network problem MQ doesnot release the connection so the count keep increasing as I reconnect.
OR I suspect there is a timer in the connection to the Queue which expires if there is nothing to PUT/GET |
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| Vitor |
| Posted: Thu May 22, 2008 9:43 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| gjohn wrote: |
| OR I suspect there is a timer in the connection to the Queue which expires if there is nothing to PUT/GET |
No
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