actually i have seen large files or large multi-file set uploads cause coldfusion to go right to 100% CPU usage. usually after 15 minutes or so you'll get a winnt error returned about "unable to write file" or some other bs. our machines usually start hating around 40 megs using cf and apache. sometimes less using cf and iis. the truth is that CFFILE uploads, at least on windows boxes, are very poor performance and are not a good choice for large volume file-upload applications. there is actually nothing you can do about it except weep and then implement your user file-uploads some other way (like through asp, or java). maybe cf5 handles it better; i dunno. maybe if macromedia came out with their own webserver they could fix it. we use software artisans 'sa-fileup' to handle our file uploads in large volumes in excess of 200 megs with no problem. you can even build a progress meter and stuff. of course you'll need to use asp or some other com-integrated platform to use sa-fileup.
http://www.softwareartisans.com/softartisans/saf.html brendan avery 2.0 - [EMAIL PROTECTED] 310.779.2211 - santa monica, california > -----Original Message----- > From: Brunt, Michael [mailto:[EMAIL PROTECTED]] > Sent: Monday, January 21, 2002 13:12 > To: CF-Talk > Subject: RE: Coldfusion Server > > > Chad, I have never yet seen any file large enough to consume > 100% CPU usage > but I have seen many 100% CPU usage issues. I would say that > this is almost > certainly related to shared scope variable memory corruption. > However, > before sending off on a wild goose chase, here is what I > suggest. Look in > the ColdFusion logs mainly the Application and Server logs > and do a search > for words or strings such as "thread" "threading" "unexpected > error" "p code > error". If you find regular occurrences of such words and > phrases you have > shared-scope-variable problems. ColdFusion being a multi-threaded > environment needs all shared-scope variable reads and writes > to be locked > using the CFLock tag. So any application. session. or > server. variable > settings or reads need to be locked. If you have immense > site(s) with many > many pages the best way to deal with this problem is again to > use the logs > to isolate which ColdFusion files are causing the errors and > use CFLock > there first. > > I hope this helps. > > Mike Brunt > Sempra Energy > 213.244.5226 > > "To define recursion, we must first define recursion." > > > -----Original Message----- > From: Chad McCue [mailto:[EMAIL PROTECTED]] > Sent: Monday, January 21, 2002 12:36 PM > To: CF-Talk > Subject: Coldfusion Server > > > I am experiencing 100% CPU usage on my cold fusion server. One reason > suggested to me was that large files may be getting uploaded on my > server. Can anybody tell me what is considered a large file > that would > be capable of timing out my server? Any other suggestions about this > problem would help a lot. > Thanks, > Chad McCue > Cold Fusion Web Developer > Advanced Media Productions > 508-647-5151 Ext. 16 > > > > > ______________________________________________________________________ Why Share? Dedicated Win 2000 Server � PIII 800 / 256 MB RAM / 40 GB HD / 20 GB MO/XFER Instant Activation � $99/Month � Free Setup http://www.pennyhost.com/redirect.cfm?adcode=coldfusionc 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
