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MQSeries.net Forum IndexGeneral IBM MQ Supportread ahead performance advantages

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saneben
PostPosted: Wed Aug 16, 2017 2:55 am Post subject: read ahead performance advantages Reply with quote

Voyager

Joined: 04 Apr 2004
Posts: 84

we have been asked to use the read ahead performance advantages for non-persistent messages.
While the client programs are changed on some machines to specify the MQOO_READ_AHEAD
option, some other machines have to run the existing client application code without that option for
a certain period of time.
to support the coexistence of the two different versions of the client application
can we set the below property


SHARECNV(0) on the SVRCONN channel
DEFREADA(YES) for the queues


https://www.ibm.com/support/knowledgecenter/en/SSFKSJ_8.0.0/com.ibm.mq.dev.doc/q026310_.htm
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exerk
PostPosted: Wed Aug 16, 2017 4:50 am Post subject: Reply with quote

Jedi Council

Joined: 02 Nov 2006
Posts: 5750

So which bit of the KC article are you unclear about?

I am assuming that you'll have different SVRCONN channels per application type.
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It's puzzling, I don't think I've ever seen anything quite like this before...and it's hard to soar like an eagle when you're surrounded by turkeys.

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saneben
PostPosted: Wed Aug 16, 2017 7:53 am Post subject: Reply with quote

Voyager

Joined: 04 Apr 2004
Posts: 84

hi,

Thanks for your reply.

As you mentioned we have different SVRCONN channels per application type

Since we have multiple versions of clients is the below setting sufficient

SHARECNV(0) on the SVRCONN channel
DEFREADA(YES) for the queues

Regards
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exerk
PostPosted: Wed Aug 16, 2017 8:17 am Post subject: Reply with quote

Jedi Council

Joined: 02 Nov 2006
Posts: 5750

Again, which bit of the KC article are you unclear about?
_________________
It's puzzling, I don't think I've ever seen anything quite like this before...and it's hard to soar like an eagle when you're surrounded by turkeys.

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PaulClarke
PostPosted: Wed Aug 16, 2017 9:11 pm Post subject: Reply with quote

Sentinel

Joined: 17 Nov 2005
Posts: 861
Location: New Zealand

A value of SHARECNV(0) will prevent READ_AHEAD from working
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Paul Clarke
MQGem Software
www.mqgem.com
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