nginx-site: xml/en/docs/freebsd

annotate xml/en/docs/freebsd_tuning.xml @ 3090:27532d42102b default tip

Documented the "rate" parameter of the "error_log" directive.

author	Maxim Dounin <mdounin@mdounin.ru>
date	Sun, 16 Jun 2024 06:55:30 +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 @ 3090:27532d42102b default tip