| Author |
Message
|
| bernard_fay |
 Posted: Thu Mar 21, 2013 6:33 am Post subject: concurrent connections by listener |
 |
|
Apprentice
Joined: 24 Jul 2012
Posts: 30
|
Hi,
I am looking for the number of concurrent established connections per MQ TCP listener for WMQ on Windows, if there is such a limit and I think so because of the backlog parameter. If there was no limit there would be no need for the backlog paramater.
Does someone know about this limit? The info center has not been useful so far except for the backlog values.
Thanks |
|
| Back to top |
|
 |
| mqjeff |
| Posted: Thu Mar 21, 2013 7:01 am Post subject: |
|
|
Grand Master
Joined: 25 Jun 2008
Posts: 17447
|
So,
| Quote: |
BACKLOG(integer)
The number of concurrent connection requests that the listener supports. |
from http://pic.dhe.ibm.com/infocenter/wmqv7/v7r5/topic/com.ibm.mq.doc/sc10520_.htm
Is the number of incoming connections that the listener can handle coming in at once.
The queue manager has a maximum number of channels it can support at any one time, and a maximum number of active channels it can support, and a maximum number of TCP channels that can be active.
In addition, each channel can have a maximum number of instances... |
|
| Back to top |
|
|
| bernard_fay |
| Posted: Thu Mar 21, 2013 7:18 am Post subject: |
|
|
Apprentice
Joined: 24 Jul 2012
Posts: 30
|
Thanks mqjeff for your reply,
I think sometimes the info center contradict it-self. From what I can read here:
http://pic.dhe.ibm.com/infocenter/wmqv7/v7r5/index.jsp?topic=%2Fcom.ibm.mq.doc%2Fic13340_.htm
As it says on the first paragraph:
| Quote: |
| A maximum value is set for these outstanding connection requests and can be considered a backlog of requests waiting on the TCP port for the listener to accept the request. |
I don't know what to think about this backlog thing. 
Now about the maximum number of channels, should I understand this maximum should be equal to the number of concurrent connections? I am not sure I understand the concept of channels here. I know we have to define channels either between qmgrs or MQI channels but I have the feeling the channels that you talk about here are not the same. Right?
Thanks |
|
| Back to top |
|
|
| bernard_fay |
| Posted: Thu Mar 21, 2013 7:59 am Post subject: |
|
|
Apprentice
Joined: 24 Jul 2012
Posts: 30
|
I just woke up! I got it.
Thanks |
|
| Back to top |
|
|
| gbaddeley |
| Posted: Thu Mar 21, 2013 2:25 pm Post subject: Re: concurrent connections by listener |
|
|
Jedi Knight
Joined: 25 Mar 2003
Posts: 2538
Location: Melbourne, Australia
|
| bernard_fay wrote: |
Hi,
I am looking for the number of concurrent established connections per MQ TCP listener for WMQ on Windows, if there is such a limit and I think so because of the backlog parameter. If there was no limit there would be no need for the backlog paramater.Thanks |
Its not the concurrent estabilished channel connections to the Queue Manager, its the number of outstanding initial connection requests that the listener (runmqlsr) is currently dealing with, and is going to hand off to Message Channel Agent processes (amqrmppa) to take over for the rest of the life of the connection.
_________________
Glenn |
|
| Back to top |
|
|
| bernard_fay |
| Posted: Fri Mar 22, 2013 5:41 am Post subject: |
|
|
Apprentice
Joined: 24 Jul 2012
Posts: 30
|
Even clearer! Now I can see a kind of relationship among the processes.
Thanks Glenn |
|
| Back to top |
|
|
|
|
