RE: Oracle on Windows 2000 AS with /3GB flag
- From: "Ted Coyle" <oracle-l@xxxxxxxxxxxx>
- To: <wjwagman@xxxxxxxxxxx>, <Brandon.Allen@xxxxxxxxxxx>, <saints.richard@xxxxxxxxx>
- Date: Tue, 17 Jul 2007 10:58:34 -0400
Win64 does not support /3GB switch. It isn't need in 64-bit environment.
http://support.microsoft.com/kb/294418/
Copied from support note:
System PTEs
A pool of system Page Table Entries (PTEs) that is used to map system pages
such as I/O space, Kernel stacks, and memory descriptor lists. 64-bit
programs use a 16-terabyte tuning model (8 terabytes User and 8 terabytes
Kernel). 32-bit programs still use the 4-GB tuning model (2 GB User and 2 GB
Kernel). This means that 32-bit processes that run on 64-bit versions of
Windows run in a 4-GB tuning model (2 GB User and 2GB Kernel). 64-bit
versions of Windows do not support the use of the /3GB switch in the boot
options. Theoretically, a 64-bit pointer could address up to 16 exabytes.
64-bit versions of Windows have currently implemented up to 16 terabytes of
address space.
_____
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]
On Behalf Of William Wagman
Sent: Monday, July 16, 2007 7:52 PM
To: Brandon.Allen@xxxxxxxxxxx; saints.richard@xxxxxxxxx;
oracle-l@xxxxxxxxxxxxx
Subject: RE: Oracle on Windows 2000 AS with /3GB flag
Allen,
Does this hold true for 64-bit Windows as well? Until seeing this thread I
was unaware of the /3GB switch available for windows. It sounds analogous to
compiling in the hugemem kernel in Linux. Or are the two unrelated? On
Technet so far the only document I have found is the 32-bit Oracle Database
Platform Guide, chapter 1. Can you point out a good source of information on
this please.
Thanks.
Bill Wagman
Univ. of California at Davis
IET Campus Data Center
wjwagman@xxxxxxxxxxx
(530) 754-6208
_____
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]
On Behalf Of Allen, Brandon
Sent: Monday, July 16, 2007 3:07 PM
To: saints.richard@xxxxxxxxx; oracle-l@xxxxxxxxxxxxx
Subject: RE: Oracle on Windows 2000 AS with /3GB flag
I always use the /3G flag on all Windows database servers - for both Oracle
and SQL Server. I've used it several times on different combinations of
Windows, SQL & Oracle versions and never had any problems.
Regards,
Brandon
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