Re: OPS instalation - pretty urgent

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Hi,

on AIX platforms, Oracle actually uses it's post wait driver architecture.
It's a substitute for the operating system's semaphores. The background is
that due to an exhaustive overhead dealing with OS semaphores (context switch),
Oracle handles the waits within the (Oracle) kernel space instead of handing
over the control to the OS's kernel space. See Steve Adam's "Oracle Internals" book.

| Regards,                   |
| Stefan Jahnke              |
| BOV AG                     |
| @:D2 Vodafone, Abt.: FBOM  |
| Tel.: 0211/533-4893        |
 ----------------------------

K Gopalakrishnan schrieb:
>
> !! Please do not post Off Topic to this List !!
>
> Hi,
>
> 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: Gogala, Mladen
> INET: MGogala_at_oxhp.com
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> Author: K Gopalakrishnan
> INET: kaygopal_at_yahoo.com
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Author: Stefan Jahnke
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