My understanding is that switching from 32-bit to 64-bit will negatively impact speed, unless the program is able to use the additional address space to boost performance beyond that speed hit. I assume that ColdFusion should benefit from being 64-bit if you also give it more than 4 GB of RAM and use that extra RAM to cache additional objects. If the Web sites don't make use of the additional RAM, then I would expect 64-bit CF to perform worse than 32-bit CF, in addition to introducing other potential issues surrounding 64-bit software.
The <a href=http://dotnetrocks.com/archives.aspx>Dot Net Rocks</a> podcast in the past couple months has had a few good discussions with Microsoft engineers on developing 32-bit apps versus 64-bit apps and why Visual Studio 2010 is only a 32-bit application. The definitive statement from the Microsoft software engineers was that making a program like VS 2010 or MS Word 2010 64-bit would make it slower without adding much value since those programs don't benefit from giving them massive amount of RAM. The only reason to make a 64-bit version of MS Word would be because the majority of people assume 64-bit is better than 32-bit, so the marketplace starts demanding 64-bit versions of products, even though they would be slower-performing products. -Mike Chabot On Tue, May 25, 2010 at 12:39 PM, Sean Corfield <[email protected]> wrote: > > On Tue, May 25, 2010 at 8:34 AM, Martin, Dustin W > <[email protected]> wrote: >> Has anyone ever upgraded from the 32bit to 64bit version of CF8? Does that >> require us pay for an upgrade is that free to do? > > Someone pointed me at this (old) blog post today and I wondered if > folks here had any more up to date experience about running CF on > 64-bit: > > http://www.cfwhisperer.com/post.cfm/64-bit-architecture-and-apparent-issues-with-java-applications > > (FWIW, all my deployments these days are to 64-bit systems but I don't > have any 32-bit systems to compare to - with the exception of my blog > which runs on a 32-bit cloud server at EWH) > -- > Sean A Corfield -- (904) 302-SEAN > Railo Technologies, Inc. -- http://getrailo.com/ > An Architect's View -- http://corfield.org/ > > "If you're not annoying somebody, you're not really alive." > -- Margaret Atwood > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology-Michael-Dinowitz/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:333982 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
