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| MaxChannel setting |
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| cheanfeiy |
 Posted: Wed Jun 13, 2007 10:06 pm Post subject: MaxChannel setting |
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Apprentice
Joined: 21 Jun 2003
Posts: 26
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Hi experts,
My QM was currently experienced the "Maximum number of channels reached" issue. Therefore, I am planning to increase the the MaxChannel to a greater value, said from 100 to 1000.
Below is my MQ Infomation:
Name: WebSphere MQ
Version: 6.0.1.1
CMVC level: p600-101-060504
BuildType: IKAP - (Production)
My question are:
1. Is there any impacts to the QM and server performance by increasing the MaxChannel to 1000?
2. By increasing the MaxChannel value, will it takes up system memory and effects the server performance?
Thanks |
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| DTran |
| Posted: Wed Jun 13, 2007 11:05 pm Post subject: |
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Acolyte
Joined: 11 May 2006
Posts: 62
Location: Amsterdam
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Normally 100 connections are more than enough, i suggest you take a look at the application, make sure that the application close down all unused connection or using connection pool.
If it still caused problem, you can decrease the heartbeat interval of the serverconn channel.
_________________
There are 10 types of people in this world - those who understand binary and those who don't |
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| cheanfeiy |
| Posted: Wed Jun 13, 2007 11:20 pm Post subject: |
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Apprentice
Joined: 21 Jun 2003
Posts: 26
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In my scenario, 100 connection is definitely not enough. Increasing the MaxChannel to 1000 is to cater for future client applications.
So, my concern is whether changing MaxChannel will impact server performance. |
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| Vitor |
| Posted: Thu Jun 14, 2007 12:35 am Post subject: Re: MaxChannel setting |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| cheanfeiy wrote: |
My question are:
1. Is there any impacts to the QM and server performance by increasing the MaxChannel to 1000?
2. By increasing the MaxChannel value, will it takes up system memory and effects the server performance?
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Yes to both. That's a lot of channels - you'll need a fair bit of resource.
But as MAXCHL is only valid on z/OS, you should have bags of it
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Honesty is the best policy.
Insanity is the best defence. |
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