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| angka |
 Posted: Thu Jul 05, 2007 12:52 am Post subject: Throughput of MQ channel |
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Chevalier
Joined: 20 Sep 2005
Posts: 406
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Hi,
What is the maximum throughput for MQ channel??
Thanks |
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| Mr Butcher |
| Posted: Thu Jul 05, 2007 12:57 am Post subject: |
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Padawan
Joined: 23 May 2005
Posts: 1716
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999.999.999.999.999.999.999.999.999 million billion messages per nanosecond
there are many parameters that have an influence on your channel throughput
line capacity / speed
message size
batching
persistence
npmspeed
cpu speed
......
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| angka |
| Posted: Thu Jul 05, 2007 2:24 am Post subject: |
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Chevalier
Joined: 20 Sep 2005
Posts: 406
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Hi,
Sorry I know the question is very vague but what i need is jus a rough guide. User ask me without giving the spec and configuration
Thanks. |
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| jefflowrey |
| Posted: Thu Jul 05, 2007 2:32 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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| angka wrote: |
Hi,
Sorry I know the question is very vague but what i need is jus a rough guide. User ask me without giving the spec and configuration |
Then tell them "as fast as it's configured to go".
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I am *not* the model of the modern major general. |
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| Vitor |
| Posted: Thu Jul 05, 2007 2:34 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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That's not vague it's impossible. For instance, not knowing if your design is using persistent or non-persistent messaging makes it impossible to give an accurate answer even assuming you could guess at platform, because persistence has such an impact on throughput.
That's before we've talked about message size, network speed, etc, etc.
If you want a rough guide it'll be somewhere between 100,000 messages a second and 1 message an hour. Unless you design a set up that causes a message to take more than an hour to send! 
You have, of course, already looked through the various Redbooks and white papers concerned with this and found nothing of use.
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Honesty is the best policy.
Insanity is the best defence. |
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| angka |
| Posted: Thu Jul 05, 2007 3:01 am Post subject: |
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Chevalier
Joined: 20 Sep 2005
Posts: 406
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Hi,
Ya I did look ard but it compares persistent with non persistent and alot of other parameters... user are not technically train so usually ask question without providing us with the spec...
Btw I have asked IBM to help out and I provided them with some parameters.
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| Vitor |
| Posted: Thu Jul 05, 2007 3:12 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| angka wrote: |
Btw I have asked IBM to help out and I provided them with some parameters.
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If you'd provided them to us it might have helped!
Even non-technical users can be given some insight into the spec issues. For instance, when I'm asked the question "how fast will the system go" while we're still in the business requirements phase I respond "Pretend we're designing a car. Will you want 2 seats, 4 seats, a people carrier or a minibus? All other things, like engine size, being equal it will go at 4 very different speeds".
I apologise to anyone who has a minibus than can outrun a Porshe Boxter, and sympathise with any Porshe owners overtaken by minibuses.
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| mqhelpless |
| Posted: Sun Jul 08, 2007 5:35 pm Post subject: |
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Apprentice
Joined: 13 Jul 2005
Posts: 33
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| Say I have uniform size messages of 100KB each, with persistency set. And my line is 20Mbps. Without load from my system, the line is about 40% utilized. In this case, how do we measure the throughput? |
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| Vitor |
| Posted: Sun Jul 08, 2007 11:49 pm Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| mqhelpless wrote: |
| In this case, how do we measure the throughput? |
Enqueue rate? 
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| fjb_saper |
| Posted: Mon Jul 09, 2007 3:04 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| mqhelpless wrote: |
| Say I have uniform size messages of 100KB each, with persistency set. And my line is 20Mbps. Without load from my system, the line is about 40% utilized. In this case, how do we measure the throughput? |
a) make sure you monitor disk (dasd) usage and speed for
- MQ Logs You need them big enough
- MQ Queue
- Transaction size / number of uncommitted messages / number of messages in your UOW
My guess is this will be your limiting factor
b)make sure you monitor network usage and bandwidth
Enjoy 
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| bruce2359 |
| Posted: Mon Jul 09, 2007 2:03 pm Post subject: |
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Guest
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Back to the original post: the maximum throughout of an MQ channel is just slightly less than the full bandwidth available. The 'slightly less' represents the hand-shaking taking place between the sender and receiver mca's before/after message batches.
You can affect the aggregate throughput by manipulating batchsize and batchinterval. |
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