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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> machine.</para>
<para>Starting with FreeBSD 4.5, the system will auto-tune this setting <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 using an earlier version of FreeBSD, or you want to manage it
yourself you will want to set yourself you will want to set
<literal>maxusers</literal> to at least 4, especially if you are <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 <para>This is the basic hard drive filesystem. Leave it in if you
boot from the hard disk.</para> 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 <programlisting>options MFS #Memory Filesystem
options MD_ROOT #MD is a potential root device</programlisting> 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> <para>Memory disk pseudo-devices.</para>
<programlisting>pesudo-device gif</programlisting>
<para>or</para>
<programlisting>pseudo-device gif 4 # IPv6 and IPv4 tunneling</programlisting> <programlisting>pseudo-device gif 4 # IPv6 and IPv4 tunneling</programlisting>
<para>This implements IPv6 over IPv4 tunneling, IPv4 over IPv6 <para>This implements IPv6 over IPv4 tunneling, IPv4 over IPv6 tunneling,
tunneling, IPv4 over IPv4 tunneling, and IPv6 over IPv6 IPv4 over IPv4 tunneling, and IPv6 over IPv6 tunneling. Beginning with
tunneling.</para> 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> <programlisting>pseudo-device faith 1 # IPv6-to-IPv4 relaying (translation)</programlisting>