On 2010/07/03 18:17, Joerg Sonnenberger wrote: > On Sat, Jul 03, 2010 at 05:40:45PM +0200, Claudio Jeker wrote: > > 35M, that is insane. Either they have machines with infinite memory or you > > can kill the boxes easily.
some would also say that 16K is insane ;-) > You don't need 35MB per client connection if interfaces like sendfile(2) > are used. All the kernel has to guarantee in that case is copy-on-write > for the file content as far as it has been "send" already. Media > distribution server normally don't change files inplace, so the only > backpressure this creates is on the VFS cache. Let's assume the server > is busy due to a new OpenBSD/Linux/Firefox/whatever release. A lot of > clients will try to fetch a small number of distinct files. The memory > the kernel has to commit is limited by the size of that active set, not > by the number of clients. there is some pretty serious hardware behind it... http://mirror.aarnet.edu.au/indexabout.html
