Hints on Running a High-Performance Web Server
Running Apache on a heavily loaded web server, one often encounters
problems related to the machine and OS configuration. "Heavy" is
relative, of course - but if you are seeing more than a couple hits
per second on a sustained basis you should consult the pointers on
this page. In general the suggestions involve how to tune your kernel
for the heavier TCP load, hardware/software conflicts that arise, etc.
A/UX (Apple's UNIX)
If you are running Apache on A/UX, a page that gives some helpful
performance hints (concerning the listen() queue and using
can be found here
BSD-based (BSDI, FreeBSD, etc)
performance tuning hints for BSD-derived systems.
We have some newsgroup postings on how to
tune Digital UNIX 3.2 and 4.0.
Some documentation on tuning HP machines can be found at http://www.software.hp.com/internet/perf/tuning.html.
The Solaris 2.4 TCP implementation has a few inherent limitations that
only became apparent under heavy loads. This has been fixed to some
extent in 2.5 (and completely revamped in 2.6), but for now consult
the following URL for tips on how to expand the capabilities if you
are finding slowdowns and lags are hurting performance.
More information on tuning SOMAXCONN on SunOS can be found at
The manual translated into Japanese is here.