nginx-site: xml/en/docs/freebsd

annotate xml/en/docs/freebsd_tuning.xml @ 1878:127ae107e5a9

Removed clause about shared memory and Windows versions with ASLR. Starting with nginx 1.9.0 shared memory can be used on Windows versions with address space layout randomization.

author	Maxim Dounin <mdounin@mdounin.ru>
date	Mon, 26 Dec 2016 19:38:06 +0300
parents	ac131944d349
children

rev	line source
580 be54c443235a Added copyright markers to documentation sources. Ruslan Ermilov <ru@nginx.com> parents: 271 diff changeset	1 <!--
be54c443235a Added copyright markers to documentation sources. Ruslan Ermilov <ru@nginx.com> parents: 271 diff changeset	2 Copyright (C) Igor Sysoev
be54c443235a Added copyright markers to documentation sources. Ruslan Ermilov <ru@nginx.com> parents: 271 diff changeset	3 Copyright (C) Nginx, Inc.
be54c443235a Added copyright markers to documentation sources. Ruslan Ermilov <ru@nginx.com> parents: 271 diff changeset	4 -->
be54c443235a Added copyright markers to documentation sources. Ruslan Ermilov <ru@nginx.com> parents: 271 diff changeset	5
50 9d544687d02c Fixed DOCTYPE declaration. Ruslan Ermilov <ru@nginx.com> parents: 0 diff changeset	6 <!DOCTYPE article SYSTEM "../../../dtd/article.dtd">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	7
123 7db449e89e92 Unified the use of the "name" attribute instead of "title". Ruslan Ermilov <ru@nginx.com> parents: 121 diff changeset	8 <article name="Tuning FreeBSD for the highload"
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	9 link="/en/docs/tuning_freebsd.html"
589 764fbac1b8b4 Added document revision. Ruslan Ermilov <ru@nginx.com> parents: 580 diff changeset	10 lang="en"
764fbac1b8b4 Added document revision. Ruslan Ermilov <ru@nginx.com> parents: 580 diff changeset	11 rev="1">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	12
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	13
121 49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	14 <section name="Syncache and syncookies">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	15
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	16 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	17 We look at how various kernel settings affect ability of the kernel
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	18 to process requests. Let’s start with TCP/IP connection establishment.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	19 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	20
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	21 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	22 [ syncache, syncookies ]
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	23 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	24
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	25 </section>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	26
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	27
121 49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	28 <section id="listen_queues"
49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	29 name="Listen queues">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	30
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	31 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	32 After the connection has been established it is placed in the listen queue
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	33 of the listen socket.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	34 To see the current listen queues state, you may run the command
148 682163f2b298 Unified article/path and module/pathname into a single "path". Ruslan Ermilov <ru@nginx.com> parents: 123 diff changeset	35 “<command>netstat -Lan</command>”:
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	36
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	37 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	38 Current listen queue sizes (qlen/incqlen/maxqlen)
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	39 Proto Listen Local Address
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	40 tcp4 <b>10</b>/0/128 *.80
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	41 tcp4 0/0/128 *.22
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	42 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	43
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	44 This is a normal case: the listen queue of the port *:80 contains
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	45 just 10 unaccepted connections.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	46 If the web server is not able to handle the load, you may see
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	47 something like this:
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	48
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	49 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	50 Current listen queue sizes (qlen/incqlen/maxqlen)
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	51 Proto Listen Local Address
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	52 tcp4 <b>192/</b>0/<b>128</b> *.80
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	53 tcp4 0/0/128 *.22
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	54 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	55
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	56 Here are 192 unaccepted connections and most likely new coming connections
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	57 are discarding. Although the limit is 128 connections, FreeBSD allows
1144 ac131944d349 Changed infinitive to gerund after "allow". Yaroslav Zhuravlev <yar@nginx.com> parents: 1118 diff changeset	58 receiving 1.5 times connections than the limit before it starts to discard
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	59 the new connections. You may increase the limit using
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	60
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	61 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	62 sysctl kern.ipc.somaxconn=4096
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	63 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	64
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	65 However, note that the queue is only a damper to quench bursts.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	66 If it is always overflowed, this means that you need to improve the web server,
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	67 but not to continue to increase the limit.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	68 You may also change the listen queue maximum size in nginx configuration:
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	69
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	70 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	71 listen 80 backlog=1024;
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	72 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	73
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	74 However, you may not set it more than the current
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	75 <path>kern.ipc.somaxconn</path> value.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	76 By default nginx uses the maximum value of FreeBSD kernel.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	77 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	78
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	79 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	80 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	81 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	82 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	83
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	84 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	85 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	86 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	87 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	88
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	89 </section>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	90
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	91
121 49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	92 <section id="sockets_and_files"
49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	93 name="Sockets and files">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	94
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	95 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	96 [ sockets, files ]
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	97 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	98
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	99 </section>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	100
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	101
121 49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	102 <section id="socket_buffers"
49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	103 name="Socket buffers">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	104
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	105 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	106 When a client sends a data, the data first is received by the kernel
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	107 which places the data in the socket receiving buffer.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	108 Then an application such as the web server
271 4c6d2c614d2c Cleaned up XML tag mess: Ruslan Ermilov <ru@nginx.com> parents: 148 diff changeset	109 may call <c-func>recv</c-func> or <c-func>read</c-func> system calls
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	110 to get the data from the buffer.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	111 When the application wants to send a data, it calls
271 4c6d2c614d2c Cleaned up XML tag mess: Ruslan Ermilov <ru@nginx.com> parents: 148 diff changeset	112 <c-func>send</c-func> or <c-func>write</c-func>
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	113 system calls to place the data in the socket sending buffer.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	114 Then the kernel manages to send the data from the buffer to the client.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	115 In modern FreeBSD versions the default sizes of the socket receiving
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	116 and sending buffers are respectively 64K and 32K.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	117 You may change them on the fly using the sysctls
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	118 <path>net.inet.tcp.recvspace</path> and
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	119 <path>net.inet.tcp.sendspace</path>.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	120 Of course the bigger buffer sizes may increase throughput,
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	121 because connections may use bigger TCP sliding windows sizes.
747 ddec437b692b Fixed a number of typos. Vladimir Homutov <vl@nginx.com> parents: 589 diff changeset	122 And on the Internet you may see recommendations to increase
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	123 the buffer sizes to one or even several megabytes.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	124 However, such large buffer sizes are suitable for local networks
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	125 or for networks under your control.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	126 Since on the Internet a slow modem client may ask a large file
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	127 and then it will download the file during several minutes if not hours.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	128 All this time the megabyte buffer will be bound to the slow client,
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	129 although we may devote just several kilobytes to it.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	130 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	131
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	132 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	133 There is one more advantage of the large sending buffers for
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	134 the web servers such as Apache which use the blocking I/O system calls.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	135 The server may place a whole large response in the sending buffer, then may
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	136 close the connection, and let the kernel to send the response to a slow client,
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	137 while the server is ready to serve other requests.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	138 You should decide what is it better to bind to a client in your case:
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	139 a tens megabytes Apache/mod_perl process
747 ddec437b692b Fixed a number of typos. Vladimir Homutov <vl@nginx.com> parents: 589 diff changeset	140 or the hundreds kilobytes socket sending buffer.
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	141 Note that nginx uses non-blocking I/O system calls
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	142 and devotes just tens kilobytes to connections,
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	143 therefore it does not require the large buffer sizes.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	144 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	145
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	146 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	147 [ dynamic buffers ]
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	148 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	149
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	150 </section>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	151
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	152
121 49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	153 <section id="mbufs"
49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	154 name="mbufs, mbuf clusters, etc.">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	155
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	156 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	157 Inside the kernel the buffers are stored in the form of chains of
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	158 memory chunks linked using the <i>mbuf</i> structures.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	159 The mbuf size is 256 bytes and it can be used to store a small amount
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	160 of data, for example, TCP/IP header. However, the mbufs point mostly
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	161 to other data stored in the <i>mbuf clusters</i> or <i>jumbo clusters</i>,
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	162 and in this kind they are used as the chain links only.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	163 The mbuf cluster size is 2K.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	164 The jumbo cluster size can be equal to a CPU page size (4K for i386 and amd64),
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	165 9K, or 16K.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	166 The 9K and 16K jumbo clusters are used mainly in local networks with Ethernet
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	167 frames larger than usual 1500 bytes, and they are beyond the scope of
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	168 this article.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	169 The page size jumbo clusters are usually used for sending only,
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	170 while the mbuf clusters are used for both sending and receiving.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	171
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	172 To see the current usage of the mbufs and clusters and their limits,
148 682163f2b298 Unified article/path and module/pathname into a single "path". Ruslan Ermilov <ru@nginx.com> parents: 123 diff changeset	173 you may run the command <nobr>“<command>netstat -m</command>”.</nobr>
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	174 Here is a sample from FreeBSD 7.2/amd64 with the default settings:
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	175
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	176 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	177 1477/<b>3773/5250 mbufs</b> in use (current/cache/total)
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	178 771/2203/<b>2974/25600 mbuf clusters</b> in use (current/cache/total/max)
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	179 771/1969 mbuf+clusters out of packet secondary zone in use
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	180 (current/cache)
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	181 296/863/<b>1159/12800 4k (page size) jumbo clusters</b> in use
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	182 (current/cache/total/max)
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	183 0/0/0/6400 9k jumbo clusters in use (current/cache/total/max)
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	184 0/0/0/3200 16k jumbo clusters in use (current/cache/total/max)
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	185 3095K/8801K/11896K bytes allocated to network(current/cache/total)
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	186 0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters)
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	187 0/0/0 requests for jumbo clusters denied (4k/9k/16k)
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	188 0/0/0 sfbufs in use (current/peak/max)
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	189 0 requests for sfbufs denied
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	190 0 requests for sfbufs delayed
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	191 523590 requests for I/O initiated by sendfile
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	192 0 calls to protocol drain routines
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	193 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	194
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	195 There are 12800 page size jumbo clusters,
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	196 therefore they can store only 50M of data.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	197 If you set the <path>net.inet.tcp.sendspace</path> to 1M,
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	198 then merely 50 slow clients will take all jumbo clusters
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	199 requesting large files.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	200 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	201
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	202 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	203 You may increase the clusters limits on the fly using:
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	204
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	205 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	206 sysctl kern.ipc.nmbclusters=200000
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	207 sysctl kern.ipc.nmbjumbop=100000
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	208 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	209
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	210 The former command increases the mbuf clusters limit
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	211 and the latter increases page size jumbo clusters limit.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	212 Note that all allocated mbufs clusters will take about 440M physical memory:
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	213 (200000 × (2048 + 256)) because each mbuf cluster requires also the mbuf.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	214 All allocated page size jumbo clusters will take yet about 415M physical memory:
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	215 (100000 × (4096 + 256)).
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	216 And together they may take 845M.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	217
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	218 <note>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	219 The page size jumbo clusters have been introduced in FreeBSD 7.0.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	220 In earlier versions you should tune only 2K mbuf clusters.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	221 Prior to FreeBSD 6.2, the <path>kern.ipc.nmbclusters</path> value can be
747 ddec437b692b Fixed a number of typos. Vladimir Homutov <vl@nginx.com> parents: 589 diff changeset	222 set only on the boot time via loader tunable.
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	223 </note>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	224 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	225
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	226 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	227 On the amd64 architecture FreeBSD kernel can use for sockets buffers
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	228 almost all physical memory,
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	229 while on the i386 architecture no more than 2G memory can be used,
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	230 regardless of the available physical memory.
747 ddec437b692b Fixed a number of typos. Vladimir Homutov <vl@nginx.com> parents: 589 diff changeset	231 We will discuss the i386 specific tuning later.
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	232 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	233
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	234 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	235 There is way not to use the jumbo clusters while serving static files:
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	236 the <i>sendfile()</i> system call.
1144 ac131944d349 Changed infinitive to gerund after "allow". Yaroslav Zhuravlev <yar@nginx.com> parents: 1118 diff changeset	237 The sendfile allows sending a file or its part to a socket directly
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	238 without reading the parts in an application buffer.
1118 9ca8b71e0e03 mufs -> mbufs. Maxim Konovalov <maxim@nginx.com> parents: 747 diff changeset	239 It creates the mbufs chain where the mbufs point to the file pages that are
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	240 already present in FreeBSD cache memory, and passes the chain to
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	241 the TCP/IP stack.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	242 Thus, sendfile decreases both CPU usage by omitting two memory copy operations,
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	243 and memory usage by using the cached file pages.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	244 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	245
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	246 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	247 And again, the amd64 sendfile implementation is the best:
271 4c6d2c614d2c Cleaned up XML tag mess: Ruslan Ermilov <ru@nginx.com> parents: 148 diff changeset	248 the zeros in the <nobr>“<literal>netstat -m</literal>”</nobr> output
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	249 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	250 ...
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	251 <b>0/0/0</b> sfbufs in use (current/peak/max)
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	252 ...
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	253 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	254 mean that there is no <i>sfbufs</i> limit,
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	255 while on i386 architecture you should to tune them.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	256 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	257
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	258 <!--
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	259
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	260 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	261
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	262 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	263 vm.pmap.pg_ps_enabled=1
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	264
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	265 vm.kmem_size=3G
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	266
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	267 net.inet.tcp.tcbhashsize=32768
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	268
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	269 net.inet.tcp.hostcache.cachelimit=40960
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	270 net.inet.tcp.hostcache.hashsize=4096
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	271 net.inet.tcp.hostcache.bucketlimit=10
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	272
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	273 net.inet.tcp.syncache.hashsize=1024
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	274 net.inet.tcp.syncache.bucketlimit=100
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	275 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	276
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	277 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	278
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	279 net.inet.tcp.syncookies=0
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	280 net.inet.tcp.rfc1323=0
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	281 net.inet.tcp.sack.enable=1
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	282 net.inet.tcp.fast_finwait2_recycle=1
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	283
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	284 net.inet.tcp.rfc3390=0
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	285 net.inet.tcp.slowstart_flightsize=2
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	286
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	287 net.inet.tcp.recvspace=8192
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	288 net.inet.tcp.recvbuf_auto=0
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	289
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	290 net.inet.tcp.sendspace=16384
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	291 net.inet.tcp.sendbuf_auto=1
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	292 net.inet.tcp.sendbuf_inc=8192
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	293 net.inet.tcp.sendbuf_max=131072
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	294
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	295 # 797M
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	296 kern.ipc.nmbjumbop=192000
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	297 # 504M
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	298 kern.ipc.nmbclusters=229376
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	299 # 334M
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	300 kern.ipc.maxsockets=204800
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	301 # 8M
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	302 net.inet.tcp.maxtcptw=163840
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	303 # 24M
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	304 kern.maxfiles=204800
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	305 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	306
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	307 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	308
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	309 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	310
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	311 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	312 sysctl net.isr.direct=0
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	313 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	314
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	315 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	316 sysctl net.inet.ip.intr_queue_maxlen=2048
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	317 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	318
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	319 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	320
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	321 -->
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	322
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	323 </section>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	324
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	325
121 49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	326 <section id="proxying"
49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	327 name="Proxying">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	328
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	329
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	330 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	331 net.inet.ip.portrange.randomized=0
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	332 net.inet.ip.portrange.first=1024
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	333 net.inet.ip.portrange.last=65535
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	334 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	335
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	336 </section>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	337
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	338
121 49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	339 <section id="finalizing_connection"
49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	340 name="Finalizing connection">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	341
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	342 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	343 net.inet.tcp.fast_finwait2_recycle=1
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	344 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	345
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	346 </section>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	347
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	348
121 49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	349 <section id="i386_specific_tuning"
49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	350 name="i386 specific tuning">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	351
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	352 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	353 [ KVA, KVM, nsfbufs ]
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	354 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	355
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	356 </section>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	357
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	358
747 ddec437b692b Fixed a number of typos. Vladimir Homutov <vl@nginx.com> parents: 589 diff changeset	359 <section id="minor_optimizations"
121 49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	360 name="Minor optimizations">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	361
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	362 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	363
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	364 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	365 sysctl kern.random.sys.harvest.ethernet=0
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	366 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	367
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	368 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	369
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	370 </section>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	371
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	372 </article>

Mercurial > hg > nginx-site

annotate xml/en/docs/freebsd_tuning.xml @ 1878:127ae107e5a9