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| ucbus1 |
 Posted: Fri Aug 03, 2018 1:22 pm Post subject: |
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Knight
Joined: 30 Jan 2002
Posts: 560
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| bruce2359 |
| Posted: Fri Aug 03, 2018 3:05 pm Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9486
Location: US: west coast, almost. Otherwise, enroute.
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Is this a new app?
Has it worked before? If it worked before, what has changed?
Does every transaction cause this message delay? Or just some messages?
_________________
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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| ucbus1 |
| Posted: Mon Aug 06, 2018 8:03 am Post subject: |
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Knight
Joined: 30 Jan 2002
Posts: 560
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| On further investigation noticed we were getting message not found error 2033 even when the put time on the message was bit old ,showing that the message was put 10 sec before. This could be a COMMIT issue by the datapower as some of you have suggeted. But the datapower documentation and settings suggest that the COMMIT should have happened immediately after a successful PUT. May open a ticket and see where it leads. if anyone has any further input on the issue please share. |
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| bruce2359 |
| Posted: Mon Aug 06, 2018 8:20 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9486
Location: US: west coast, almost. Otherwise, enroute.
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Run a trace on the affected qmgr to confirm whether an MQCMIT took place or not.
_________________
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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| ucbus1 |
| Posted: Mon Aug 06, 2018 8:44 am Post subject: |
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Knight
Joined: 30 Jan 2002
Posts: 560
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| bruce2359 wrote: |
| Run a trace on the affected qmgr to confirm whether an MQCMIT took place or not. |
Thanks. Since this is production queue, will running trace cause any issue?
How about running dspmqtrn? |
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| rammer |
| Posted: Mon Aug 06, 2018 8:55 am Post subject: |
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Partisan
Joined: 02 May 2002
Posts: 359
Location: England
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| ucbus1 wrote: |
| bruce2359 wrote: |
| Run a trace on the affected qmgr to confirm whether an MQCMIT took place or not. |
Thanks. Since this is production queue, will running trace cause any issue?
How about running dspmqtrn? |
IBM quote running trace can cause system to slow down but only by milliseconds. You will only want to put trace on for a minute or so as well due to so much data gathered. ensure you have plenty of space for storage! also review the trace options to ensure you pick the right options for your criteria. |
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| ucbus1 |
| Posted: Mon Aug 06, 2018 9:10 am Post subject: |
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Knight
Joined: 30 Jan 2002
Posts: 560
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| rammer wrote: |
IBM quote running trace can cause system to slow down but only by milliseconds. You will only want to put trace on for a minute or so as well due to so much data gathered. ensure you have plenty of space for storage! also review the trace options to ensure you pick the right options for your criteria. |
Thanks |
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| bruce2359 |
| Posted: Mon Aug 06, 2018 9:30 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9486
Location: US: west coast, almost. Otherwise, enroute.
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Tim Zielke should be along any time now. He’s our resident trace guy.
_________________
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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| ucbus1 |
| Posted: Mon Aug 06, 2018 11:26 am Post subject: |
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Knight
Joined: 30 Jan 2002
Posts: 560
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On a different thought. could this be due to low batcsz parameter cluster receiver channel. It is currently set to 50 which I believe is default.
From IBM documentation
"Messages arriving at the receiving MCA are placed on the target application queues under syncpoint control. This means that they are not visible to any receiving applications until the commit is performed. If the batch size is large, messages may not be made available to receiving applications for some time which may have a severe impact on the message throughput of the overall system. Because the batch size is so greatly influenced by the message arrival rate on the transmission queue, it is generally recommended to set the Batchsize quite high"
Could this Batchsize parm is the issue? What is criteria and ideal value to set this Batchsize parameter?
Last edited by ucbus1 on Mon Aug 06, 2018 11:29 am; edited 2 times in total |
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| tczielke |
| Posted: Mon Aug 06, 2018 11:27 am Post subject: |
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Guardian
Joined: 08 Jul 2010
Posts: 941
Location: Illinois, USA
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What platform is this trace being run on?
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Working with MQ since 2010. |
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| ucbus1 |
| Posted: Mon Aug 06, 2018 11:28 am Post subject: |
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Knight
Joined: 30 Jan 2002
Posts: 560
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| tczielke wrote: |
| What platform is this trace being run on? |
Z/OS |
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| bruce2359 |
| Posted: Mon Aug 06, 2018 12:32 pm Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9486
Location: US: west coast, almost. Otherwise, enroute.
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| tczielke |
| Posted: Mon Aug 06, 2018 12:42 pm Post subject: |
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Guardian
Joined: 08 Jul 2010
Posts: 941
Location: Illinois, USA
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On z/OS, some of the monitoring tools (e.g. BMC Mainview) have their own API tracing that you can do, as well.
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Working with MQ since 2010. |
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| ucbus1 |
| Posted: Mon Aug 06, 2018 2:56 pm Post subject: |
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Knight
Joined: 30 Jan 2002
Posts: 560
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| PeterPotkay |
| Posted: Mon Aug 06, 2018 4:25 pm Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7723
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| ucbus1 wrote: |
On a different thought. could this be due to low batcsz parameter cluster receiver channel. It is currently set to 50 which I believe is default.
Could this Batchsize parm is the issue? What is criteria and ideal value to set this Batchsize parameter? |
Probably not the issue unless BATCHINT is also high and there is very little traffic on the channel, causing it to wait until BATCH INTERVAL or BATCH SIZE is met.
_________________
Peter Potkay
Keep Calm and MQ On |
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