This really depends on your work load. When it comes to performance tuning make no assumptions. Every environment is different. I would suggest invest your time in collecting some metrics. Set up cacti and graph your switch ping latency, server ram usage, cpu and diskio. You should then be able to spot the bottleneck. And forecast what will be a bottleneck as you expand. <blockquote type="cite">On Aug 29, 2009 12:59 PM, "Harry Sweet" <<a href="mailto:hsweet@gcsny.org">hsweet@gcsny.org</a>> wrote: Hi all; Going into the year, I hope to be able to solve workstation lagging problems once and for all. I'm not sure where the bottleneck is as no swapping happens, and network thruput looks ok. But I often get lagging when a full class is on. 9.04 64 bit Ubuntu Server = intel quad core, 8 gig ram, SATA drive, server box has a gigibit ethernet but the switch is 100. It also runs the classes web server, very lightly used and along with that Mysql, again not very busy and not used at all in most classes. 20 Workstations are all 10 year old Ibm's, 256k ram. Which of these things would likely improve performance the most? 1. Reinstall the server version of Ubuntu 2. Lose the GUI on the server or at least drop Gnome for something faster 3. Run Firefox as a local app 4. Get a gigabit switch to replace our 10 year old 100meg switch. 5. Raid or SCSI disks 6.. Something I haven't thought of ..... thanks Harry Sweet Goshen High School Goshen, NY -- edubuntu-users mailing list <a href="mailto:edubuntu-users@lists.ubuntu.com">edubuntu-users@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/edubuntu-users" target="_blank">https://lists.ubuntu.com/mailman/listinfo/edubuntu-users</a> </blockquote>