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| SVRCONN channel instances per thread |
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| mq__quest |
 Posted: Mon Sep 11, 2017 1:15 pm Post subject: SVRCONN channel instances per thread |
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Apprentice
Joined: 21 Aug 2017
Posts: 49
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Hello,
I'm using perfharness tool and sending messages to MQ(V9) in 1 thread, and when I check the SYSTEM.DEF.SVRCONN status, I'm seeing 2 instances. I"ve tested this multiple times and noticed n*2 SYSTEM.DEF.SVRCONN instances running per n threads. I thought only 1 instance would start per thread. could someone explain this, please?
dis chs(SYSTEM.DEF.SVRCONN) ALL
4 : dis chs(SYSTEM.DEF.SVRCONN) ALL
AMQ8417: Display Channel Status details.
CHANNEL(SYSTEM.DEF.SVRCONN) CHLTYPE(SVRCONN)
BUFSRCVD(4176) BUFSSENT(4174)
BYTSRCVD(3612652) BYTSSENT(1185784)
CHSTADA(2017-09-11) CHSTATI(16.48.04)
COMPHDR(NONE,NONE) COMPMSG(NONE,NONE)
COMPRATE(0,0) COMPTIME(0,0)
CONNAME(1.3.2.293) CURRENT
EXITTIME(0,0) HBINT(300)
JOBNAME(0000442D000001D4) LOCLADDR(::ffff:11.3.2.299(1419))
LSTMSGDA(2017-09-11) LSTMSGTI(16.48.15)
MCASTAT(RUNNING) MCAUSER(rbmp)
MONCHL(OFF) MSGS(4173)
RAPPLTAG(JMSPerfHarness) SECPROT(NONE)
SSLCERTI( ) SSLKEYDA( )
SSLKEYTI( ) SSLPEER( )
SSLRKEYS(0) STATUS(RUNNING)
STOPREQ(NO) SUBSTATE(MQICALL)
CURSHCNV(1) MAXSHCNV(1)
RVERSION(08000005) RPRODUCT(MQJM)
AMQ8417: Display Channel Status details.
CHANNEL(SYSTEM.DEF.SVRCONN) CHLTYPE(SVRCONN)
BUFSRCVD(7) BUFSSENT(6)
BYTSRCVD(1448) BYTSSENT(1416)
CHSTADA(2017-09-11) CHSTATI(16.48.03)
COMPHDR(NONE,NONE) COMPMSG(NONE,NONE)
COMPRATE(0,0) COMPTIME(0,0)
CONNAME(1.3.2.293) CURRENT
EXITTIME(0,0) HBINT(300)
JOBNAME(0000442D000001D3) LOCLADDR(::ffff:11.3.2.299(1419))
LSTMSGDA(2017-09-11) LSTMSGTI(16.48.03)
MCASTAT(RUNNING) MCAUSER(rbmp)
MONCHL(OFF) MSGS(4)
RAPPLTAG(JMSPerfHarness) SECPROT(NONE)
SSLCERTI( ) SSLKEYDA( )
SSLKEYTI( ) SSLPEER( )
SSLRKEYS(0) STATUS(RUNNING)
STOPREQ(NO) SUBSTATE(RECEIVE)
CURSHCNV(1) MAXSHCNV(1)
RVERSION(08000005) RPRODUCT(MQJM) |
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| RogerLacroix |
| Posted: Tue Sep 12, 2017 2:25 pm Post subject: Re: server-conn channel instances per thread |
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Jedi Knight
Joined: 15 May 2001
Posts: 3264
Location: London, ON Canada
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| mq__quest wrote: |
| check the SYSTEM.DEF.SVRCONN status |
First off, NOBODY or more correctly NO application should be using the SYSTEM.DEF.SVRCONN channel. Create a unique channel for your application or have your MQAdmin do it.
| mq__quest wrote: |
| noticed n*2 SYSTEM.DEF.SVRCONN instances running per n threads |
So, check the code - it sounds like the application is opening 2 connections per thread.
Regards,
Roger Lacroix
Capitalware Inc.
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| mq__quest |
| Posted: Wed Sep 13, 2017 7:27 am Post subject: Re: server-conn channel instances per thread |
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Apprentice
Joined: 21 Aug 2017
Posts: 49
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| RogerLacroix wrote: |
| mq__quest wrote: |
| noticed n*2 SYSTEM.DEF.SVRCONN instances running per n threads |
So, check the code - it sounds like the application is opening 2 connections per thread. |
But I'm seeing the same issue with another testing tool(JMeter), wondering if I need to check any configurations on MQ side. The tools are using binding file to connect to mq to put to clustered alias queue. |
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| mqjeff |
| Posted: Wed Sep 13, 2017 8:02 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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If you're using bindings, then you're not using any svrconns.
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| bruce2359 |
| Posted: Wed Sep 13, 2017 11:06 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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For clarity, there are two choices for 'bindings,' namely: Server-bindings and Client-bindings. Server-bindings send MQI calls cross-memory (within an LPAR), while Client-bindings send MQI calls cross-network.
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| mq__quest |
| Posted: Wed Sep 13, 2017 11:18 am Post subject: |
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Apprentice
Joined: 21 Aug 2017
Posts: 49
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| bruce2359 wrote: |
| For clarity, there are two choices for 'bindings,' namely: Server-bindings and Client-bindings. Server-bindings send MQI calls cross-memory (within an LPAR), while Client-bindings send MQI calls cross-network. |
sorry, I wasn't clear earlier. I meant .binding file with TRANSPORT(CLIENT).
I have this in the file
DEFINE QCF(myCF) QMANAGER() CHANNEL(SYSTEM.DEF.SVRCONN) HOSTNAME(11.3.2.299) PORT(1419) TRANSPORT(CLIENT)
DEFINE Q(myQueue) QUEUE(TEST.ALIAS) QMANAGER() TARGCLIENT(JMS) |
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| vinay.gollapalli |
| Posted: Thu Sep 14, 2017 2:27 am Post subject: |
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Novice
Joined: 22 Aug 2017
Posts: 22
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| They are 2 difference calls one MQICALL and another one is RECEIVE call ,it getting created by your app where it tries to make multiple calls and also see MSGS there is a difference in both the calls. |
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| hughson |
| Posted: Fri Sep 15, 2017 3:08 pm Post subject: Re: SVRCONN channel instances per thread |
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Padawan
Joined: 09 May 2013
Posts: 1959
Location: Bay of Plenty, New Zealand
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| mq__quest wrote: |
Hello,
I'm using perfharness tool and sending messages to MQ(V9) in 1 thread, and when I check the SYSTEM.DEF.SVRCONN status, I'm seeing 2 instances. I"ve tested this multiple times and noticed n*2 SYSTEM.DEF.SVRCONN instances running per n threads. I thought only 1 instance would start per thread. could someone explain this, please? |
From your channel status output I can see that this is a JMS applcation:-
| mq__quest wrote: |
| RAPPLTAG(JMSPerfHarness) RPRODUCT(MQJM) |
Quite often, you will see that JMS applications make two MQ Connections, one for the JMS Connection, and one for the JMS Session. This is quite normal.
You will be able to see these two connections if you use the following command while your application is running.
| Code: |
| DISPLAY CONN(*) TYPE(ALL) ALL WHERE(CHANNEL EQ SYSTEM.DEF.SVRCONN) |
or if you have lots of other things also using that channel then try
| Code: |
| DISPLAY CONN(*) TYPE(ALL) ALL WHERE(APPLTAG EQ 'JMSPerfHarness') |
If you want to know what your application is doing, why not run an Application Activity Trace on it. You'll be able to see how many connections it makes and what each of those connections do.
Cheers,
Morag
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Morag Hughson @MoragHughson
IBM MQ Technical Education Specialist
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| mq__quest |
| Posted: Mon Sep 18, 2017 6:18 am Post subject: Re: SVRCONN channel instances per thread |
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Apprentice
Joined: 21 Aug 2017
Posts: 49
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[quote="hughson"]
| mq__quest wrote: |
| mq__quest wrote: |
| RAPPLTAG(JMSPerfHarness) RPRODUCT(MQJM) |
Quite often, you will see that JMS applications make two MQ Connections, one for the JMS Connection, and one for the JMS Session. This is quite normal.
You will be able to see these two connections if you use the following command while your application is running.
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Thanks very much, Morag. It makes sense now. And yes, I do see 2 conns with the channel.
Thanks again. |
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