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| hmh |
 Posted: Mon Jul 05, 2010 8:04 am Post subject: maximum of 100 SVRCONN connections |
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Apprentice
Joined: 31 Mar 2006
Posts: 29
Location: Germany
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Hello all,
actually I got the following problem.
Windows MQ-Client 6.0.2.6 tries to connect more than 100 sessions to a QMGR 6.0.2.1 running on Solaris.
Are there other restrictions to 100 IP-Channel-Connections known?
The default sessions of the QMGR are increased to 1000 defined in the qm.ini
Channels:
MaxChannels=1000
$ echo 'dis chs(*)' | runmqsc QMGR| grep CONNAME | sort | uniq -c
1 CONNAME(140.10.2.7) CURRENT
1 CONNAME(140.10.2.8) CURRENT
100 CONNAME(140.10.225.20) CURRENT
1 CONNAME(140.4.160.148) CURRENT
1 CONNAME(mvsc001(1414)) CURRENT
The sum of used channels are 104.
Kind regards
Michael
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Michael Hoppe
63067 Offenbach
+49 (0)170 / 9629 131
http://www.hmhcs.de |
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| fjb_saper |
| Posted: Mon Jul 05, 2010 8:50 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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You might have an exit limiting the number of connections from a particular source. What is your application doing to need that many channels?
Are you sure the connections are being closed by the application as soon as they are no longer needed? 
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| SAFraser |
| Posted: Mon Jul 05, 2010 1:47 pm Post subject: |
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Shaman
Joined: 22 Oct 2003
Posts: 742
Location: Austin, Texas, USA
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After you increased the MaxChannels limit, did you recycle your queue manager?
(Please don't mind the question; I noticed you only have 20 posts so I can't tell if you are new to MQ or not!) |
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| hmh |
| Posted: Mon Jul 05, 2010 11:07 pm Post subject: |
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Apprentice
Joined: 31 Mar 2006
Posts: 29
Location: Germany
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Yes I do.
The QMGR was restartet after changing the qm.ini
| SAFraser wrote: |
After you increased the MaxChannels limit, did you recycle your queue manager?
(Please don't mind the question; I noticed you only have 20 posts so I can't tell if you are new to MQ or not!) |
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Michael Hoppe
63067 Offenbach
+49 (0)170 / 9629 131
http://www.hmhcs.de |
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| mqjeff |
| Posted: Tue Jul 06, 2010 1:35 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| Is it MaxChannels or MaxActiveChannels that needs to be set? |
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| fjb_saper |
| Posted: Tue Jul 06, 2010 2:37 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| mqjeff wrote: |
| Is it MaxChannels or MaxActiveChannels that needs to be set? |
If not set, doesn't MaxActiveChannels default to MaxChannels?
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| SAFraser |
| Posted: Tue Jul 06, 2010 5:01 am Post subject: |
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Shaman
Joined: 22 Oct 2003
Posts: 742
Location: Austin, Texas, USA
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Yes, MaxActiveChannels defaults to MaxChannels.
Here's an obvious question that no one has asked. What is the error being manifested when channel count goes above 100?
The MaxChannels of 1000 must be working or else he wouldn't see 104 channels, right? He would only see 100. |
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| hmh |
| Posted: Tue Jul 06, 2010 5:03 am Post subject: |
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Apprentice
Joined: 31 Mar 2006
Posts: 29
Location: Germany
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MaxChannels is set to 1000, so this isn't the limit.
Actual it looks like a undocumented Parameter in the Application.
I have another System that uses for stresstest purposes more than 1200 Open Channels from 2 Systems using a native MQ-Client
| fjb_saper wrote: |
| mqjeff wrote: |
| Is it MaxChannels or MaxActiveChannels that needs to be set? |
If not set, doesn't MaxActiveChannels default to MaxChannels? |
_________________
Michael Hoppe
63067 Offenbach
+49 (0)170 / 9629 131
http://www.hmhcs.de |
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| SAFraser |
| Posted: Tue Jul 06, 2010 5:09 am Post subject: |
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Shaman
Joined: 22 Oct 2003
Posts: 742
Location: Austin, Texas, USA
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| I'm sorry, I've lost the plot. What are we trying to troubleshoot? What is broken? |
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| hmh |
| Posted: Tue Jul 06, 2010 8:35 am Post subject: |
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Apprentice
Joined: 31 Mar 2006
Posts: 29
Location: Germany
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The problem is, that a MQ-Client only starts 100 Channel-Connections to connect to a MQ-Server.
Really, normally I only accept until 5 Open Channels from one System and I set a maximum limit to open a channel, but I'm interested to find out why the client only connect 100 times and not more like another Stresstest-System which are able to connect until 2500 parallel channels or more.
| SAFraser wrote: |
| I'm sorry, I've lost the plot. What are we trying to troubleshoot? What is broken? |
_________________
Michael Hoppe
63067 Offenbach
+49 (0)170 / 9629 131
http://www.hmhcs.de |
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| fjb_saper |
| Posted: Tue Jul 06, 2010 1:10 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| hmh wrote: |
The problem is, that a MQ-Client only starts 100 Channel-Connections to connect to a MQ-Server.
Really, normally I only accept until 5 Open Channels from one System and I set a maximum limit to open a channel, but I'm interested to find out why the client only connect 100 times and not more like another Stresstest-System which are able to connect until 2500 parallel channels or more.
| SAFraser wrote: |
| I'm sorry, I've lost the plot. What are we trying to troubleshoot? What is broken? |
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Like I have pointed out: check if there is a limitation on the channel:
See channel properties in V7 and / or before V7 if an exit is limiting the number of connections.
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| mqjava |
| Posted: Wed Jul 07, 2010 7:29 am Post subject: |
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Voyager
Joined: 25 May 2009
Posts: 80
Location: New Jersey
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If you have BlockIP configured for the channel, check you are restricting the number of channels through BlockIP.
Thanks. |
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