> Why are the file descriptor limits still so low? I understand that for most > things it's fine, but when building a super high performance mail server, > this just isn't enough. Can this setting be changed on the fly yet like in > Slowlaris? are you using 2.2 or 2.4? in 2.2, the default was 4096 file descriptors, in 2.4 the default is raised to 8192. (look in /proc/sys/fs/file-max). to change this, either: echo <value> > /proc/sys/fs/file-max or: sysctl -w fs.file-max=<value> you can also put: fs.file-max=<value> in your /etc/sysctl.conf file, if your distro uses that. (RH does, SuSE doesn't by default). then it should be read in at boot time. alternatively, put the 'echo <value> > /proc/sys/fs/file-max' in whatever your distro uses for rc.local. 'man sysctl' for more info. Carl Soderstrom -- Network Engineer Real-Time Enterprises (952) 943-8700