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| Max number of channels reached |
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| bruce2359 |
 Posted: Wed Feb 24, 2010 10:03 pm Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9471
Location: US: west coast, almost. Otherwise, enroute.
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Is SYSTEM.DEF.SVRCONN the only channel you have defined, and are using? Any other channels?
What do you get when you do a DIS CHS(*) command?
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| morrisea |
| Posted: Wed Feb 24, 2010 10:28 pm Post subject: Max channels reached |
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Novice
Joined: 09 Apr 2006
Posts: 21
Location: South Africa
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Hi,
My apologies for a little misunderstanding. It isn't SYSTEM.DEF.SVRCONN, although on other machines this is used. In this case it is a specific svrconn channel called OFFLINE.SVRCONN.CHAN. Anyway, to answer the question, using either MQ Explorer, MO71 or command line DIS CHS(*) this is the one showing the most connections. There are other normal sndr/rcvr pairs (about 4) - also a couple of other SVRCONN channels. However, using MO71 (MQMON) Display Channel Status (*) which shows all connections the result was 600 connections in total. |
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| shashivarungupta |
| Posted: Thu Feb 25, 2010 12:43 am Post subject: Re: Max channels reached |
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Grand Master
Joined: 24 Feb 2009
Posts: 1343
Location: Floating in space on a round rock.
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| morrisea wrote: |
Hi,
My apologies for a little misunderstanding. It isn't SYSTEM.DEF.SVRCONN, although on other machines this is used. In this case it is a specific svrconn channel called OFFLINE.SVRCONN.CHAN. Anyway, to answer the question, using either MQ Explorer, MO71 or command line DIS CHS(*) this is the one showing the most connections. There are other normal sndr/rcvr pairs (about 4) - also a couple of other SVRCONN channels. However, using MO71 (MQMON) Display Channel Status (*) which shows all connections the result was 600 connections in total. |
also you could have tried hitting this...
echo 'dis chs(ChlName) all' |runmqsc <QmgrName> | grep 8417 | wc -l
this will list the count of no. of connection instances on that channel.
I have given the comment on your last question...on my first post.. pls check.
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Last edited by shashivarungupta on Thu Feb 25, 2010 8:18 am; edited 1 time in total |
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| mqjeff |
| Posted: Thu Feb 25, 2010 5:53 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| 95% of the time when you see way too many svrconn/clntconn instances it is because the application is doing the wrong thing with connections - like failing to close them, or opening a new one for each put or get. |
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| shashivarungupta |
| Posted: Thu Feb 25, 2010 6:11 am Post subject: |
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Grand Master
Joined: 24 Feb 2009
Posts: 1343
Location: Floating in space on a round rock.
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| mqjeff wrote: |
| 95% of the time when you see way too many svrconn/clntconn instances it is because the application is doing the wrong thing with connections - like failing to close them, or opening a new one for each put or get. |
Am 100% agree with you !
I said the same in my first post (last point) as the answer of the question from the original poster.
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| RogerLacroix |
| Posted: Thu Feb 25, 2010 8:07 am Post subject: Re: Max connections exceeded |
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Jedi Knight
Joined: 15 May 2001
Posts: 3264
Location: London, ON Canada
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| morrisea wrote: |
| none of the comments adress the matter that "when we check the status of 'SYSTEM.DEF.SVRCONN' we see 600 connections" yet the settings are set to 3000 (MaxChannels), and we are getting max.channel connections reached at 600. |
The MaxActiveChannels and MaxChannels parameters in the qm.ini file refer to ALL channels of a queue manager (i.e Server Connection, Sender, Receiver, Server, Requestor, Cluster-Sender and Cluster-Receiver ). Hence, you must total up all of the channels of the queue manger to see if you reached the max channels.
Secondly, updating the values of the MaxActiveChannels and MaxChannels parameters in the qm.ini file requires a restart of the queue manager for the values to be used by MQ. Therefore, have you restarted the queue manager since updating those values?
Regards,
Roger Lacroix
Capitalware Inc.
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| pfarrel |
| Posted: Fri Feb 26, 2010 6:36 am Post subject: |
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Centurion
Joined: 16 Mar 2004
Posts: 120
Location: Kansas City
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Another possible solution is to use the ClientIdle parameter. You can set this in the qm.ini file. It specifies a number of seconds. If a channel remains unused for that number of seconds, it will be closed by the queue manager.
Here is an example from a qm.ini file:
CHANNELS:
MaxChannels=200
MaxActiveChannels=200
ClientIdle=43200
AdoptNewMCA=ALL
In this case, since 43200 seconds is 12 hours, if any channel is not used for 12 hours, it will be closed. |
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