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MQSeries.net Forum IndexGeneral IBM MQ SupportParameter "msgs" Server Connection Channel Status

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krypton
PostPosted: Sun May 06, 2018 10:01 am Post subject: Parameter "msgs" Server Connection Channel Status Reply with quote

Centurion

Joined: 14 Mar 2010
Posts: 125

Hi,

according to IBM documentations, the parameter "msgs" in the channel status for server connection channel it defines the number of MQI calls handled.

I just checked the value of this parameter in our production system and found it is a very large number - 2211986 , and this instance of channel was started today only.

I am wondering if such high number of MQI calls is normal from a single client application?
Does this MQI calls corresponding to number of messages being sent by application.

No of MQI calls = No of messages posted by application (??)
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bruce2359
PostPosted: Sun May 06, 2018 11:07 am Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
Posts: 8054
Location: US: west coast, almost. Otherwise, enroute.

With IBM MQ Client bindings, each MQI call is transported cross-network to the SVRCONN channel - not just the MQPUT call to put a message.
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gbaddeley
PostPosted: Sun May 06, 2018 4:03 pm Post subject: Reply with quote

Padawan

Joined: 25 Mar 2003
Posts: 1821
Location: Melbourne, Australia

Is the app doing MQOPEN and MQCLOSE for each msg? MQ also does internal heartbeat messages, and most Client MQI calls will result in 2 messages.
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PeterPotkay
PostPosted: Sun May 06, 2018 4:59 pm Post subject: Reply with quote

Jedi Council

Joined: 15 May 2001
Posts: 7427

The app is probably issuing repeated MQGET calls with a small wait interval, or no wait interval at all. Over and over, it issues an MQGET for a message, finds none, and issues the MQGET call again.

This behavior can drive the "msgs" parameter on a SVRCONN channel instance very high, even though there are little to no application messages being passed.

Frequent MQINQ calls will also do it.
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Peter Potkay
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krypton
PostPosted: Mon May 07, 2018 3:03 am Post subject: Reply with quote

Centurion

Joined: 14 Mar 2010
Posts: 125

Quote:
The app is probably issuing repeated MQGET calls with a small wait interval, or no wait interval at all. Over and over, it issues an MQGET for a message, finds none, and issues the MQGET call again.


It is a batch application which puts large number of messages into Queue. I suspect they are doing repeated number of MQPUT and hence the count of MQI calls has been increasing.
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