Re: Oracle 32-bit and 64-bit client on Windows

From: Chris Taylor <>
Date: Tue, 29 Oct 2013 14:25:55 -0500
Message-ID: <>

I "assume" you have 64-bit apps running that require the 64-bit client? If not, I'd drop the 64-bit client from the workstations. Some 32-bit apps are built to check to see if they're running under WOW64 but I think the app has to be built for it. So if it's a homegrown app the devs could check out "IsWow64Process" function.

You "might" could set PROCESSOR_ARCHITECTURE=x86 before executing the program but I'm not positive on that.

Here's a link from MSDN on running 32-bit apps on 64-bit OS.

Also I believe MS recommends running 32-bit apps on 64-bit OS - even their MS Office suite they recommend going with 32-bit.


On Tue, Oct 29, 2013 at 2:13 PM, Jeffrey Beckstrom <>wrote:

> We have a need to have both the 32 and 64 bit clients installed on a
> Windows 7 PC. In order for the 32-bit application to access the 32-bit
> Oracle client, due we have to alter the search "path" prior to invoking the
> 32-bit application or will it magically know to use the 32-bit Oracle dll's?
> Jeffrey Beckstrom
> Database Administrator
> Greater Cleveland Regional Transit Authority
> Information Systems
> 1240 W. 6th Street
> Cleveland, Ohio 44113
> .
> --

Received on Tue Oct 29 2013 - 20:25:55 CET

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