I have found it's really difficult to make a significant dent in 8 cores with a single use machine of any sort... (especially if they have adequate L2 cache - which incidentally is often more important than speed on a processor). It always seems underutilized unless it is a DB server servicing many other servers or a VMWare server sliced into a bunch of machines. There are plenty of other bottlenecks that tend to pop up before the procs are really ALL in danger of pegging. The only acception we have seen on a single use machine is a fancy financial calculator running millions of calculations in a short period of time.
Mark A. Kruger, MCSE, CFG (402) 408-3733 ext 105 www.cfwebtools.com www.coldfusionmuse.com www.necfug.com -----Original Message----- From: John Foster [mailto:[email protected]] Sent: Monday, March 15, 2010 8:31 AM To: cf-talk Subject: Re: Fastest Hardware for ColdFusion 9? We normally see about 12 requests / machine / sec during peak load. I agree that 64 bit should help by making it possible to use more RAM. We're currently running 32bit with 1.25 GB allocated to the JVM and often come within 10 - 15% of the available JVM RAM on single machines for short periods of time. Do you find that you are under-utilizing the CPU in the 8 core machines? Any suggestions for particular JVM upgrades that have helped you in the past or do you think upgrades / config tweaks are very application specific? >As Dave said - 64bit will give you the biggest boost. Mainly because > you can setup massive memory allocations for the JVM. Our servers > each have 8Gb of memory with 4Gb setup for the JVM. > > More cores the better is the mantra, but we run 4 and 8 core servers > and really don't see much different between the two in performance. > > I'd stick with SCSI drives if you need a lot of read/write access. > > And yes certain JVM upgrades can boost the speed mainly because of the > bugs in earlier versions cause object creation to be very slow. > > How much load is your application seeing? Hard configuration and > scale will be affected by your applications load. > > > > Wil Genovese > > One man with courage makes a majority. > -Andrew Jackson > > A fine is a tax for doing wrong. A tax is a fine for doing well. > > On Mar 12, 2010, at 11:25 AM, John Foster wrote: > > > > > We are looking to speed up our application layer as much as possible. > We've pumped the DB up substantially and had great results. I realize > there are network, load balancer, memcache, etc and other ways than > the hardware to have impact, but we want to buy whatever will give us > some gain. > > > > Unfortunately, we didn't notice with a dual quad core server a ton > of impact in the past and didn't seem to be able to get the full > utilization, so we just stayed with multiple servers instead of fewer, > beefier servers. > > > > Will 64 bit and many cores be the best for CF 9? Or less cores at > higher clock? > > > > Does more memory help much? > > > > How about SSD hard drives for local source code? I wouldn't expect > that, but somebody seemed to suggest that somewhere. > > > > Does CF Enterprise make a big difference? > > > > Should we change the JVM to a faster one? What would that be? > > > > > > > > Thanks! > > > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:331744 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
