Index: chap-whatsnew.xml
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RCS file: /cvsroot/htdocs/guide/en/chap-whatsnew.xml,v
retrieving revision 1.9
diff -b -u -r1.9 chap-whatsnew.xml
--- chap-whatsnew.xml 5 Oct 2004 18:28:00 -0000 1.9
+++ chap-whatsnew.xml 12 Oct 2004 22:01:12 -0000
@@ -116,6 +116,44 @@
the porting of &os; to even more architectures.</para>
</sect2>
+ <sect2>
+ <title>Scalability improvements</title>
+
+ <para>
+ NetBSD 2.0 has been optimized heavily during the development
+ process. These are some of the scalability improvements:
+ </para>
+
+ <itemizedlist>
+ <listitem>
+ <para>
+ The memory allocation scheme for the buffer cache, which
+ is used for file system meta data, has been rewritten. The
+ buffer cache can now use up to 15% of the physical memory
+ in the default configuration (tunable via &man.sysctl.8;).
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Socket buffer insertion is now O(C). This can provide a
+ substantial performance boost to some applications which
+ use large socket buffers.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ i386 &man.pmap.9; now uses a splay tree instead of linked lists,
+ making &man.fork.2; scale much better as the number of processes
+ increases.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ A red-black tree is now being used to find entries in
+ vm_map. This speeds up memory allocation.
+ </listitem>
+ </itemizedlist>
+
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