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Modify release note: larger buffer sizes might mean needing to

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increase NMBCLUSTERS.
This commit is contained in:
Bruce A. Mah 2002-01-25 20:54:46 +00:00
parent 6b67c2eed8
commit 1baa0c6c5d
2 changed files with 22 additions and 2 deletions
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12
release/doc/en_US.ISO8859-1/relnotes/article.sgml
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@ -803,7 +803,17 @@ options HZ=1000 # not compulsory but strongly recommended</programlisting>
default for both buffer sizes was 16K. To try to avoid
increasing congestion, the default value for
<varname>net.inet.tcp.local_slowstart_flightsize</varname> has
been changed from infinity to 4. &merged;</para>
been changed from infinity to 4. &merged;
<note>
<para>On busy hosts, the new larger buffer sizes may require
manually increasing the
<varname>NMBCLUSTERS</varname> parameter, either in the
kernel configuration file or via the
<varname>kern.ipc.nmbclusters</varname> loader tunable.
<command>netstat -mb</command> can be used to monitor the
state of mbuf clusters.</para>
</note>
</para>
<para>TCP now supports RFC 1948 (Defending Against Sequence
Number Attacks). This functionality is controlled by the

12
release/doc/en_US.ISO8859-1/relnotes/common/new.sgml
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@ -803,7 +803,17 @@ options HZ=1000 # not compulsory but strongly recommended</programlisting>
default for both buffer sizes was 16K. To try to avoid
increasing congestion, the default value for
<varname>net.inet.tcp.local_slowstart_flightsize</varname> has
been changed from infinity to 4. &merged;</para>
been changed from infinity to 4. &merged;
<note>
<para>On busy hosts, the new larger buffer sizes may require
manually increasing the
<varname>NMBCLUSTERS</varname> parameter, either in the
kernel configuration file or via the
<varname>kern.ipc.nmbclusters</varname> loader tunable.
<command>netstat -mb</command> can be used to monitor the
state of mbuf clusters.</para>
</note>
</para>
<para>TCP now supports RFC 1948 (Defending Against Sequence
Number Attacks). This functionality is controlled by the