This shows thoughput (KBytes/second) vs. load.
Apache (blue and green) dies when subject to a load of c. 4000 parallel sessions. Yaws (red) works well even when subject to high load.
The red curve is yaws (running on
an NFS file system). The blue curve is
apache (running on an NFS file system). The green curve is apache (running on a local file
system).