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MQSeries.net Forum Index » General IBM MQ Support » Solaris kernel setting

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Mike.WG.Moody
PostPosted: Mon Dec 17, 2001 4:57 am    Post subject: Reply with quote

Newbie

Joined: 16 Dec 2001
Posts: 7

Here at British Airways we are running MQ on
AIX, Solaris, NT, OS/390, TPF and VAX - all good fun!

One problem we've not cracked is how to calculate the values to be used in /etc/system on the Solaris boxes.

Doing it by trail and error not only looks bad to others but is also very disruptive
with all the reboots.

Does any one have any rules of thumb?

[ This Message was edited by: Mike.WG.Moody on 2001-12-17 05:14 ]
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kolban
PostPosted: Mon Dec 17, 2001 5:24 am    Post subject: Reply with quote

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Joined: 22 May 2001
Posts: 1072
Location: Fort Worth, TX, USA

The Quick Beginnings manual covers details of the Solaris kernel settings.
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Mike.WG.Moody
PostPosted: Mon Dec 17, 2001 7:41 am    Post subject: Reply with quote

Newbie

Joined: 16 Dec 2001
Posts: 7

Yes it makes some suggestions but these are
not always adequate/correct for boxes with large Oracle databases, many queues, many messages etc.

They are good enough to get MQ to run but we
find they are not good enough in the rough and tumble of the real world.

[ This Message was edited by: Mike.WG.Moody on 2001-12-17 07:42 ]
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bduncan
PostPosted: Mon Dec 17, 2001 7:00 pm    Post subject: Reply with quote

Padawan

Joined: 11 Apr 2001
Posts: 1554
Location: Silicon Valley

This may not be the optimal solution, but I haven't run into any major problems with it. Namely, set all kernel parameters to the soft/hard limit. It doesn't seem to degrade performance any. This may be a bad rule of thumb (feel free to let me know) but I've noticed in my experience that on machines with MQ, Oracle, and possible another Enterprise level software product, we usually end up racheting the kernel values up and up (trial and error) until we hit the limits anyway. So why not cut to the chase?


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