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| MQAUSX - how many channels concurrently |
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| PeterPotkay |
 Posted: Tue May 24, 2005 6:49 pm Post subject: MQAUSX - how many channels concurrently |
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Poobah
Joined: 15 May 2001
Posts: 7717
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Roger,
What is the largest # of SVRCONNS you have had running with MQAUSX?
If I wanted to test lots and lots of connections, what would be the easiest way? I can code in VB.NET, so would I just create 1000 QM objects in a loop and let them sit?
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Peter Potkay
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| RogerLacroix |
| Posted: Tue May 24, 2005 7:22 pm Post subject: |
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Jedi Knight
Joined: 15 May 2001
Posts: 3253
Location: London, ON Canada
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Hi Peter,
For full authentication, I once spun-off 100 amqsputc in a loop with the SCYDATA set to "u=youruserid;p=yourpassword;s=remoteservername" in the channel table and it worked just fine. So, 1000 shouldn't be a problem.
Although, I have done 1000 with NoAuth=Y (same as MQSSX) with J2EE applications connecting & disconnecting and it worked smoothly.
Are you looking to see how many full authentications can be processed per second?
Regards,
Roger Lacroix
Capitalware Inc.
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| PeterPotkay |
| Posted: Tue May 24, 2005 7:28 pm Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7717
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Yes, I want to see if there is any noticable diff for a channel with AUTH checking or MAX checking turned on, both in speed of connecting, and memory utilization on the server.
I doubt there will be a problem, but I do need to test it just to be sure.
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Peter Potkay
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| RogerLacroix |
| Posted: Tue May 24, 2005 7:44 pm Post subject: |
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Jedi Knight
Joined: 15 May 2001
Posts: 3253
Location: London, ON Canada
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Hi,
For each active channel, about 6KB of memory will be used (freed on a MQ disconnect). For each channel that is marked for Max channels, 127 bytes of shared are used.
Regards,
Roger Lacroix
Capitalware Inc.
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| PeterPotkay |
| Posted: Tue May 24, 2005 7:46 pm Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7717
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| RogerLacroix wrote: |
| For each active channel, about 6KB of memory will be used (freed on a MQ disconnect). |
Documented anywhere in the IBM manuals? I have been looking for this info forever.
| RogerLacroix wrote: |
| For each channel that is marked for Max channels, 127 bytes of shared are used. |
Any mem used for AUTH marked channels?
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Peter Potkay
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| RogerLacroix |
| Posted: Tue May 24, 2005 8:00 pm Post subject: |
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Jedi Knight
Joined: 15 May 2001
Posts: 3253
Location: London, ON Canada
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Hi,
| PeterPotkay wrote: |
| RogerLacroix wrote: |
| For each active channel, about 6KB of memory will be used (freed on a MQ disconnect). |
Documented anywhere in the IBM manuals? I have been looking for this info forever. |
The 6KB is what the MQAUSX allocates for doing its thing. For the MQ Listener, I always go with the rule of 1MB per channel.
| PeterPotkay wrote: |
| RogerLacroix wrote: |
| For each channel that is marked for Max channels, 127 bytes of shared are used. |
Any mem used for AUTH marked channels? |
See above comment. For MQAUSX, regardless if NoAuth is set to Y or N, it will use 6KB per active connection.
Regards,
Roger Lacroix
Capitalware Inc.
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| PeterPotkay |
| Posted: Wed May 25, 2005 7:09 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7717
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Oh, OK, I thought 6KB was a plain MQ channel. You are saying that it is 6KB above and beyond whatever a base channel needs.
I looked at a pdf from the 2003 Conferance "M35 - Capacity Planning Questions for distributed MQ", and found this:
| Quote: |
Capacity of QMs to atach channels to clients
140K bytes per client with separate Q per Client
Capacity of QM to attach channels to QMs
484K bytes per channel pair including XMITQ
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In "M33 - Archirecting Solutions for Performance on Distributed MQ"
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# of Channel per QM?
-Storage (Runmqlsr or inetd?)
real 90k to 520k bytes
virtual 200k to 1700k bytes
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So, I guess I still wonder, how much mem does a SVRCON channel use.
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Peter Potkay
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