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| MQ PUB SUB and COA with delayed PUT times |
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| zrux |
 Posted: Fri Jul 03, 2020 12:02 am Post subject: MQ PUB SUB and COA with delayed PUT times |
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Apprentice
Joined: 21 May 2006
Posts: 37
Location: UK
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Has anyone seen issues with MQ PUTs getting delayed when trying to PUT messages to a split queue using PUB SUB and also asking for a COA
The PUB SUB is splitting the messages to 3 Qs (one local, 2 remote Qs on 2 different customer envs)
We have MQ puts for many other Queues where the same application is using the same SVRCONN to PUT the messages but its not seeing the delays and they don't have MQ PUB SUB/ application asking for COAs.
Also its been noticed that this delay happens when there has been a long period of in-activity.
So any pointers which could be the issue..PUB SUB or asking for COA/something else which could cause the delay in PUTs...? |
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| bruce2359 |
| Posted: Fri Jul 03, 2020 4:05 am Post subject: Re: MQ PUB SUB and COA with delayed PUT times |
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Poobah
Joined: 05 Jan 2008
Posts: 9442
Location: US: west coast, almost. Otherwise, enroute.
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| zrux wrote: |
| The PUB SUB is splitting the messages to 3 Qs (one local, 2 remote Qs on 2 different customer envs) |
If the request/reply/COA message flow across Sender/Receiver channels to the different customers, it's possible that the channel(s) have disconnected due to inactivity. Investigate channel attributes DisconnectInterval and BatchSize, as these can affect latency.
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| hughson |
| Posted: Sun Jul 05, 2020 8:41 pm Post subject: |
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Padawan
Joined: 09 May 2013
Posts: 1948
Location: Bay of Plenty, New Zealand
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As has already been stated, the delay may be as a result of the return route channels having to start up - can you confirm whether they are trigger started?
Also, what sort of delay are you seeing? A few seconds/minutes/hours/days?
Do the COAs turn up eventually or never?
Cheers,
Morag
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Morag Hughson @MoragHughson
IBM MQ Technical Education Specialist
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| bruce2359 |
| Posted: Sun Jul 05, 2020 9:16 pm Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9442
Location: US: west coast, almost. Otherwise, enroute.
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Do the COA’s end up in a DLQ somewhere?
_________________
I like deadlines. I like to wave as they pass by.
ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| hughson |
| Posted: Sun Jul 05, 2020 10:35 pm Post subject: Re: MQ PUB SUB and COA with delayed PUT times |
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Padawan
Joined: 09 May 2013
Posts: 1948
Location: Bay of Plenty, New Zealand
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| zrux wrote: |
Has anyone seen issues with MQ PUTs getting delayed ...
... which could cause the delay in PUTs...? |
I've just noticed that I have misread your original question. I read it as the COAs were getting delayed, but I have just re-read it and notice that you are actually saying the MQPUTs are delayed.
Please could you clarify - are you saying that the MQPUT call takes a long time to return? Is it an MQPUT or an MQPUT1? How long a delay are you talking about?
Cheers,
Morag
_________________
Morag Hughson @MoragHughson
IBM MQ Technical Education Specialist
Get your IBM MQ training here!
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