My useless comment: In such a real world scenario, anyone would put squid between Zope and the millions of users. :) Pascal -----Message d'origine----- De : zope-bounces@zope.org [mailto:zope-bounces@zope.org]De la part de Peter Millar Envoyé : mercredi 20 avril 2005 02:28 À : plone-users@lists.sourceforge.net; Zope Objet : [Zope] Memory management problems I have a serious memory problem. And would like to hear from anyone who has large image files being served up to a large number of simultaneous user base. I am running plone 2.0, zope 2.7.3, python 2.3.3, on windows 2003 server with 1.5 GB RAM. I have a 1MB image. I have created a little script to copy and paste this image. To do it 50 times takes 6 minutes and uses up 300 MB of RAM. If I then view the folder that contains all the images and start viewing the zpt that serves a single image it takes 40 seconds to a minute 20 and chews up approx 2-5MB. If I then get a few other machines to request the same image at the same time, it takes 20seconds for the first machine, 40 seconds for the next machine and 1 min for the next machine and another 20 MB of ram has been chewed up. Each time I go to serve a page my CPU usage jumps to 50% for the minute or so. After doing this over and over for a few minutes sees my machine has no RAM left. The only way to recover is to restart zope. My question after all of this is how in the world can anyone seriously use plone/zope in a real world scenario with potentially millions of users accessing a site viewing content if you have to restart your zope service every minute. I have spent the past two days looking at all sorts of cacheing ideas, session ideas etc. Is there some magic that I need to apply for this to work like any number of web image viewers. Or is it a case of throwing 100GB of Ram at the machine. ____________________________________________ Peter Millar _______________________________________________ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev ) ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.mimesweeper.com **********************************************************************