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131 lines
3.6 KiB
HTML
131 lines
3.6 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<HTML>
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<HEAD>
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<TITLE>Hints on Running a High-Performance Web Server</TITLE>
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</HEAD>
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<!-- Background white, links blue (unvisited), navy (visited), red (active) -->
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<BODY
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#000080"
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ALINK="#FF0000"
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<!--#include virtual="header.html" -->
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<H1 ALIGN="CENTER">Hints on Running a High-Performance Web Server</H1>
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Running Apache on a heavily loaded web server, one often encounters
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problems related to the machine and OS configuration. "Heavy" is
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relative, of course - but if you are seeing more than a couple hits
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per second on a sustained basis you should consult the pointers on
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this page. In general the suggestions involve how to tune your kernel
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for the heavier TCP load, hardware/software conflicts that arise, etc.
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<UL>
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<LI><A HREF="#AUX">A/UX (Apple's UNIX)</A>
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<LI><A HREF="#BSD">BSD-based (BSDI, FreeBSD, etc)</A>
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<LI><A HREF="#DEC">Digital UNIX</A>
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<LI><A HREF="perf-hp.html">HPUX</A>
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<LI><A HREF="#Linux">Linux</A>
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<LI><A HREF="#Solaris">Solaris</A>
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<LI><A HREF="#SunOS">SunOS 4.x</A>
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</UL>
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<HR>
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<H3><A NAME="AUX">
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A/UX (Apple's UNIX)
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</A></H3>
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If you are running Apache on A/UX, a page that gives some helpful
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performance hints (concerning the <EM>listen()</EM> queue and using
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virtual hosts)
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<A HREF="http://www.jaguNET.com/apache.html">can be found here</A>
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<P><HR>
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<H3><A NAME="BSD">
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BSD-based (BSDI, FreeBSD, etc)
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</A></H3>
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<A HREF="perf-bsd44.html#initial">Quick</A> and
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<A HREF="perf-bsd44.html#detail">detailed</A>
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performance tuning hints for BSD-derived systems.
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<P><HR>
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<H3><A NAME="DEC">
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Digital UNIX
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</A></H3>
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<UL>
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<LI><A
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HREF="http://www.digital.com/info/internet/document/ias/tuning.html"
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>DIGITAL UNIX Tuning Parameters for Web Servers</A>
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<LI>We have some <A HREF="perf-dec.html">newsgroup postings</A> on how
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to tune Digital UNIX 3.2 and 4.0.
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</UL>
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<P><HR>
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<H3><A NAME="Linux">
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Linux
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</A></H3>
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The most common problem on Linux shows up on heavily-loaded systems
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where the whole server will appear to freeze for a couple of minutes
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at a time, and then come back to life. This has been traced to a
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listen() queue overload - certain Linux implementations have a low
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value set for the incoming connection queue which can cause problems.
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Please see our <A
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HREF="http://www.qosina.com/~awm/apache/linux-tcp.html">Using Apache on
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Linux</A> page for more info on how to fix this.
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<P><HR>
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<H3><A NAME="Solaris">
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Solaris 2.4
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</A></H3>
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The Solaris 2.4 TCP implementation has a few inherent limitations that
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only became apparent under heavy loads. This has been fixed to some
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extent in 2.5 (and completely revamped in 2.6), but for now consult
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the following URL for tips on how to expand the capabilities if you
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are finding slowdowns and lags are hurting performance.
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<P>
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Other links:
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<UL>
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<LI><A HREF="http://www.sun.com/sun-on-net/performance.html">
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World Wide Web Server Performance,
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<http://www.sun.com/sun-on-net/performance.html></A>
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<LI><A HREF="http://www.rvs.uni-hannover.de/people/voeckler/tune/EN/tune.html">
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Solaris 2.x - tuning your TCP/IP stack</A> contains some good technical
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information about tuning various Solaris TCP/IP parameters.
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</UL>
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<P><HR>
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<H3><A NAME="SunOS">
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SunOS 4.x
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</A></H3>
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More information on tuning SOMAXCONN on SunOS can be found at
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<A HREF="http://www.islandnet.com/~mark/somaxconn.html">
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http://www.islandnet.com/~mark/somaxconn.html</A>.
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<P><HR>
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<H3>More welcome!</H3>
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If you have tips to contribute, send mail to <A
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HREF="mailto:brian@organic.com">brian@organic.com</A>
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</BODY></HTML>
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