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Include a footnote with the algorithm used to tune maxusers.

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Document UFS_DIRHASH.

Note that "gif" is auto-cloning in 4.4 and up.
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Nik Clayton 2002-01-19 13:12:34 +00:00
parent b5a9e19af3
commit d4b2892aa1
Notes: svn2git 2020-12-08 03:00:23 +00:00 
svn path=/head/; revision=11759
1 changed files with 23 additions and 4 deletions
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en_US.ISO8859-1/books/handbook/kernelconfig/chapter.sgml
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@ -511,7 +511,10 @@ cpu EV5</programlisting>
machine.</para>
<para>Starting with FreeBSD 4.5, the system will auto-tune this setting
for you if you explicitly set it to <literal>0</literal>. If you are
for you if you explicitly set it to <literal>0</literal><footnote>
<para>The auto-tuning algorithm sets <literal>maxuser</literal> equal
to the amount of memory in the system, with a minimum of 32, and a
maximum of 512.</para></footnote>. If you are
using an earlier version of FreeBSD, or you want to manage it
yourself you will want to set
<literal>maxusers</literal> to at least 4, especially if you are
@ -598,6 +601,15 @@ options FFS_ROOT #FFS usable as root device [keep this!]</programli
<para>This is the basic hard drive filesystem. Leave it in if you
boot from the hard disk.</para>
<programlisting>options UFS_DIRHASH #Improve performance on big directories</programlisting>
<para>This option includes some code to speed up disk operations on large
directories, at the expense of using a some additional memory. You
would normally keep this for a large server, or interactive workstation,
and remove it if you are using FreeBSD on a smaller system where memory
is at a premium and disk access speed is less important, such as a
firewall.</para>
<programlisting>options MFS #Memory Filesystem
options MD_ROOT #MD is a potential root device</programlisting>
@ -1099,11 +1111,18 @@ pseudo-device pty # Pseudo-ttys (telnet etc)</programlisting>
<para>Memory disk pseudo-devices.</para>
<programlisting>pesudo-device gif</programlisting>
<para>or</para>
<programlisting>pseudo-device gif 4 # IPv6 and IPv4 tunneling</programlisting>
<para>This implements IPv6 over IPv4 tunneling, IPv4 over IPv6
tunneling, IPv4 over IPv4 tunneling, and IPv6 over IPv6
tunneling.</para>
<para>This implements IPv6 over IPv4 tunneling, IPv4 over IPv6 tunneling,
IPv4 over IPv4 tunneling, and IPv6 over IPv6 tunneling. Beginning with
FreeBSD 4.4 the <literal>gif</literal> device is
<quote>auto-cloning</quote>, and you should use the first example
(without the number after <literal>gif</literal>). Earlier versions of
FreeBSD require the number.</para>
<programlisting>pseudo-device faith 1 # IPv6-to-IPv4 relaying (translation)</programlisting>