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Gopal et al,
One of the main differences between Oracle on HP-UX/Solaris/Sequent and
Oracle on IBM is their use of the Post-wait driver which uses a
'test-and-set' lightweight mechanisn instead of semaphores. The other
difference (in this OS memory structure area) is that Shared Memory segments
need not be configured - there is of course an internal limit. I have never
encountered this limit though). This greatly reduces the risk of having to
restart the OS when adding databases to an existing box and the /etc/system
needs to be changed.
I don't want to start on the ease/strength/maturity of AIX's Logical Volume
Manager lest I trigger off a your-OS-vs-mine war!
John Kanagaraj
Oracle Applications DBA
DB Soft Inc
Work : (408) 970 7002
Listen to great, commercial-free christian music 24x7x365 at
http://www.klove.com
** The opinions and facts contained in this message are entirely mine
and do not reflect those of my employer or customers **
>You are right. IBM uses a light weight process
>(post wait driver??) instead of typical System V
>semaphores. It is dynamically allocated and
>you don't need to explicitly set them in
>sys config files (Right John??)
>
>
>Best Regards,
>K Gopalakrishnan
>Bangalore, INDIA
>
>-----Original Message-----
>Mladen
>Sent: Thursday, September 13, 2001 1:45 PM
>To: Multiple recipients of list ORACLE-L
>
>
>!! Please do not post Off Topic to this List !!
>
>Don, failover, dispatcher cross registration and server load balancing
>require MTS. Second, I'm not on AIX, that is why I was guessing about
>semaphores.
>Here are my versions:
>
>SQL*Plus: Release 8.1.7.0.0 - Production on Thu Sep 13 15:36:53 2001
>
>(c) Copyright 2000 Oracle Corporation. All rights reserved.
>
>Enter password:
>
>Connected to:
>Oracle8i Enterprise Edition Release 8.1.7.1.0 - 64bit Production
>With the Partitioning and Parallel Server options
>JServer Release 8.1.7.1.0 - 64bit Production
>
>SQL>
>
>HP-UX pdev1-a B.11.00 U 9000/800
>
>I admit that my advice might be a little bit off when it comes to IBM.
>HP uses semaphores and we do have tons of those.
>
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>Author: K Gopalakrishnan
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