I do believe Damon specified that CF 4.5.1 SP2 and previous contained serious bottlenecks for SMP performance. Sounds like your experience supports what he said rather than takes issue with it.
Ken -----Original Message----- From: Matt Liotta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 24, 2002 12:01 PM To: CF-Talk Subject: RE: CF5 and SMP Performance... I am going to take issue with your statement as it is not entirely true. With Linux 2.2.x and CF 4.5.1, having more than one processor will decrease CF's performance. I am sure you observed this. I did find some kernel patches that helped this situation, but they never became part of the mainline kernel. -Matt > -----Original Message----- > From: Damon Cooper [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, April 24, 2002 3:56 AM > To: CF-Talk > Subject: CF5 and SMP Performance... > > Couldn't help but to poke in here. I lead the performance tuning effort > for CF5. > > We spent a great deal of time on 2, 4 and 8 processor machines on all > platforms testing, analyzing and tuning the CF5 engine. We had one beta > tester on a 16-processor Solaris machine giving us feedback as well. > > CF451 SP2 and previous contained serious bottlenecks that prevented the > server from effectively making us of all processors. > > This was particularly observable on the 8-way machine, where it was > extremely difficult to obtain CPU utilization much above 20-45%, with > dismal avg page response times and throughput, due to threads contending > for various resources and constructs internally. > > We isolated and eliminated or tuned these in CF5, allowing CF (for the > first time, really) to actually make use of all CPU horsepower on the > machine, with enough load, we were able to see processor utilization with > our tests in the 98-100% range, with avg page response times and > throughput almost exactly 8X better than the single-CPU machine > measures...what you would expect from an 8-processor SMP machine > investment. > > THE SHORT STORY: Assuming your app doesn't have significant shared- > resource bottlenecks, if you add processors AND you're running CF5, by re- > tuning the Simultaneous Requests setting in the Admin upwards, you can > make very effective use of all processors on the machine. > > > FAQ: http://www.thenetprofits.co.uk/coldfusion/faq > Archives: http://www.mail-archive.com/[email protected]/ > Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists ______________________________________________________________________ This list and all House of Fusion resources hosted by CFHosting.com. The place for dependable ColdFusion Hosting. FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Archives: http://www.mail-archive.com/[email protected]/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
