nginx-site: xml/en/docs/freebsd

annotate xml/en/docs/freebsd_tuning.xml @ 580:be54c443235a

Added copyright markers to documentation sources.

author	Ruslan Ermilov <ru@nginx.com>
date	Tue, 10 Jul 2012 12:59:42 +0000
parents	4c6d2c614d2c
children	764fbac1b8b4

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"
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	10 lang="en">
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	11
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	12
121 49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	13 <section name="Syncache and syncookies">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	14
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	15 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	16 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	17 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	18 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	19
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	20 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	21 [ syncache, syncookies ]
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	22 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	23
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	24 </section>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	25
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	26
121 49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	27 <section id="listen_queues"
49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	28 name="Listen queues">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	29
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	30 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	31 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	32 of the listen socket.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	33 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	34 “<command>netstat -Lan</command>”:
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	35
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	36 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	37 Current listen queue sizes (qlen/incqlen/maxqlen)
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	38 Proto Listen Local Address
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	39 tcp4 <b>10</b>/0/128 *.80
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	40 tcp4 0/0/128 *.22
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	41 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	42
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	43 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	44 just 10 unaccepted connections.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	45 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	46 something like this:
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	47
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	48 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	49 Current listen queue sizes (qlen/incqlen/maxqlen)
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	50 Proto Listen Local Address
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	51 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	52 tcp4 0/0/128 *.22
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	53 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	54
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	55 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	56 are discarding. Although the limit is 128 connections, FreeBSD allows
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	57 to receive 1.5 times connections than the limit before it starts to discard
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	58 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	59
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	60 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	61 sysctl kern.ipc.somaxconn=4096
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	62 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	63
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	64 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	65 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	66 but not to continue to increase the limit.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	67 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	68
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	69 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	70 listen 80 backlog=1024;
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	71 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	72
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	73 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	74 <path>kern.ipc.somaxconn</path> value.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	75 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	76 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	77
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	78 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	79 <programlisting>
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 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	82
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	83 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	84 <programlisting>
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 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	87
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	88 </section>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	89
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	90
121 49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	91 <section id="sockets_and_files"
49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	92 name="Sockets and files">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	93
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	94 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	95 [ sockets, files ]
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	96 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	97
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	98 </section>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	99
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	100
121 49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	101 <section id="socket_buffers"
49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	102 name="Socket buffers">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	103
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	104 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	105 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	106 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	107 Then an application such as the web server
271 4c6d2c614d2c Cleaned up XML tag mess: Ruslan Ermilov <ru@nginx.com> parents: 148 diff changeset	108 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	109 to get the data from the buffer.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	110 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	111 <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	112 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	113 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	114 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	115 and sending buffers are respectively 64K and 32K.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	116 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	117 <path>net.inet.tcp.recvspace</path> and
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	118 <path>net.inet.tcp.sendspace</path>.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	119 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	120 because connections may use bigger TCP sliding windows sizes.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	121 And on the Internet you may see recomendations to increase
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	122 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	123 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	124 or for networks under your control.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	125 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	126 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	127 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	128 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	129 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	130
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	131 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	132 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	133 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	134 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	135 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	136 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	137 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	138 a tens megabytes Apache/mod_perl process
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	139 or the hundreds kilbytes socket sending buffer.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	140 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	141 and devotes just tens kilobytes to connections,
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	142 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	143 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	144
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	145 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	146 [ dynamic buffers ]
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	147 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	148
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	149 </section>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	150
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	151
121 49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	152 <section id="mbufs"
49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	153 name="mbufs, mbuf clusters, etc.">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	154
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	155 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	156 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	157 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	158 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	159 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	160 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	161 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	162 The mbuf cluster size is 2K.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	163 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	164 9K, or 16K.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	165 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	166 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	167 this article.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	168 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	169 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	170
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	171 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	172 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	173 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	174
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	175 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	176 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	177 771/2203/<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	178 771/1969 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	179 (current/cache)
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	180 296/863/<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	181 (current/cache/total/max)
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	182 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	183 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	184 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	185 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	186 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	187 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	188 0 requests for sfbufs denied
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	189 0 requests for sfbufs delayed
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	190 523590 requests for I/O initiated by sendfile
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	191 0 calls to protocol drain routines
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	192 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	193
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	194 There are 12800 page size jumbo clusters,
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	195 therefore they can store only 50M of data.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	196 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	197 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	198 requesting large files.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	199 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	200
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	201 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	202 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	203
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	204 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	205 sysctl kern.ipc.nmbclusters=200000
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	206 sysctl kern.ipc.nmbjumbop=100000
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	207 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	208
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	209 The former command increases the mbuf clusters limit
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	210 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	211 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	212 (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	213 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	214 (100000 × (4096 + 256)).
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	215 And together they may take 845M.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	216
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	217 <note>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	218 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	219 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	220 Prior to FreeBSD 6.2, the <path>kern.ipc.nmbclusters</path> value can be
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	221 set only on the boot time via loader tunnable.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	222 </note>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	223 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	224
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	225 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	226 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	227 almost all physical memory,
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	228 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	229 regardless of the available physical memory.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	230 We will discuss the i386 specific tunning later.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	231 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	232
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	233 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	234 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	235 the <i>sendfile()</i> system call.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	236 The sendfile allows to send a file or its part to a socket directly
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	237 without reading the parts in an application buffer.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	238 It creates the mbufs chain where the mufs point to the file pages that are
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	239 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	240 the TCP/IP stack.
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	241 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	242 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	243 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	244
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	245 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	246 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	247 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	248 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	249 ...
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	250 <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	251 ...
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	252 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	253 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	254 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	255 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	256
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 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	260
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	261 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	262 vm.pmap.pg_ps_enabled=1
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	263
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	264 vm.kmem_size=3G
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	265
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	266 net.inet.tcp.tcbhashsize=32768
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	267
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	268 net.inet.tcp.hostcache.cachelimit=40960
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	269 net.inet.tcp.hostcache.hashsize=4096
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	270 net.inet.tcp.hostcache.bucketlimit=10
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	271
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	272 net.inet.tcp.syncache.hashsize=1024
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	273 net.inet.tcp.syncache.bucketlimit=100
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	274 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	275
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	276 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	277
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	278 net.inet.tcp.syncookies=0
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	279 net.inet.tcp.rfc1323=0
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	280 net.inet.tcp.sack.enable=1
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	281 net.inet.tcp.fast_finwait2_recycle=1
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	282
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	283 net.inet.tcp.rfc3390=0
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	284 net.inet.tcp.slowstart_flightsize=2
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	285
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	286 net.inet.tcp.recvspace=8192
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	287 net.inet.tcp.recvbuf_auto=0
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	288
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	289 net.inet.tcp.sendspace=16384
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	290 net.inet.tcp.sendbuf_auto=1
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	291 net.inet.tcp.sendbuf_inc=8192
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	292 net.inet.tcp.sendbuf_max=131072
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	293
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	294 # 797M
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	295 kern.ipc.nmbjumbop=192000
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	296 # 504M
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	297 kern.ipc.nmbclusters=229376
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	298 # 334M
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	299 kern.ipc.maxsockets=204800
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	300 # 8M
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	301 net.inet.tcp.maxtcptw=163840
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	302 # 24M
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	303 kern.maxfiles=204800
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	304 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	305
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	306 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	307
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	308 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	309
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	310 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	311 sysctl net.isr.direct=0
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	312 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	313
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	314 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	315 sysctl net.inet.ip.intr_queue_maxlen=2048
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	316 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	317
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	318 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	319
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 </section>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	323
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	324
121 49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	325 <section id="proxying"
49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	326 name="Proxying">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	327
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 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	330 net.inet.ip.portrange.randomized=0
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	331 net.inet.ip.portrange.first=1024
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	332 net.inet.ip.portrange.last=65535
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	333 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	334
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	335 </section>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	336
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	337
121 49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	338 <section id="finalizing_connection"
49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	339 name="Finalizing connection">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	340
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	341 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	342 net.inet.tcp.fast_finwait2_recycle=1
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	343 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	344
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	345 </section>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	346
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	347
121 49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	348 <section id="i386_specific_tuning"
49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	349 name="i386 specific tuning">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	350
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	351 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	352 [ KVA, KVM, nsfbufs ]
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	353 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	354
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	355 </section>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	356
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	357
121 49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	358 <section id="minor_optmizations"
49443032011c Unified <section> syntax for "article" and "module" documents. Ruslan Ermilov <ru@nginx.com> parents: 50 diff changeset	359 name="Minor optimizations">
0 61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	360
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	361 <para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	362
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	363 <programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	364 sysctl kern.random.sys.harvest.ethernet=0
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	365 </programlisting>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	366
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	367 </para>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	368
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	369 </section>
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	370
61e04fc01027 Initial import of the nginx.org website. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	371 </article>

Mercurial > hg > nginx-site

annotate xml/en/docs/freebsd_tuning.xml @ 580:be54c443235a