Yes, but it sounds like you're comparing apples to oranges a little bit here.
If you're talking about different systems with 32 bit CPUs vs 64 bit CPUs, there's a LOT of difference between the two architecturally speaking. Not to mention different generations of motherboard chipsets, etc. Going from an older server (especially older 32-bit Xeons to the latest 64 bit ones) are generally going to give you an increase in performance. In general, same hardware - but 64 bit software vs 32 bit software - most of the time there will be little to no performance increase. Mainly because it's exactly the same code, just with bigger definitions for what size an integer is. In fact, in some cases the same software will run a little slower in 64 bits. (Measurably so, but not noticibly so - we're talking on the order of a few cpu cycles here.) Sometimes, things -will- be faster due to the CPU instruction pipeline differences, but over all - given the same set of hardware- 64bit vs 32 bit isn't a big 'performance' gain Yes, things that are computationally intensive will most likely be re-coded and optimized to take advantage of the 64 bit environment and instruction set. Those can gain HUGE performance increases, especially if they can also be multi-threaded. -- Jeff Schoby Unix/Network Admin City of Columbia, Missouri 573.874.6320 >>> "Mark Kruger" <[email protected]> 4/27/2009 2:18 PM >>> Jeff, That's true in many cases but not because there no gains in performance. There ARE very significant performance gains for processor intensive applications. Many applications simply run into other bottlenecks (I/O, bandwidth, DB etc) before they start really pegging even the 32 bit processor. We had a site running 32 bit procs (dualproc/dualcore) that was running at 70% and servicing a few hundred thousand visitors a day. On CF 64 the procs look pretty much idle most of the time with the same amount of traffic (upgrading to MSSQL05x64 helped too :). Another example - If you are doing abstract financial calculations you can get exponential gains by moving to 64 bit - with or without CF. Moreover, I suspect that we are close to a tipping point on 32/64. I'm certainly seeing a lot more new 64bit hardware than 32 bit at the moment. So I would suggest moving in that direction to keep from falling behind if for no other reason. In my mind it makes little sense to purchase 64 bit hardware only to run 32 bit software and OS on it. ** Virus scanned by City of Columbia MO Email Firewall ** ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-linux/message.cfm/messageid:4500 Subscription: http://www.houseoffusion.com/groups/cf-linux/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.14
