diff --git a/appendices/ini.xml b/appendices/ini.xml
index 6ac035ab62..181b9f0f86 100644
--- a/appendices/ini.xml
+++ b/appendices/ini.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.34 $ -->
+<!-- $Revision: 1.35 $ -->
 
 <appendix id="ini">
  <title>&php.ini; directives</title>
@@ -2850,6 +2850,70 @@
    </para>
   </section>
 
+  <section id="ini.sect.performance">
+   <title>Performance Tuning</title>
+   <para>
+    <table>
+     <title>Performance Tuning</title>
+     <tgroup cols="4">
+      <thead>
+       <row>
+        <entry>Name</entry>
+        <entry>Default</entry>
+        <entry>Changeable</entry>
+        <entry>Changelog</entry>
+       </row>
+      </thead>
+      <tbody>
+       <row>
+        <entry>realpath_cache_size</entry>
+        <entry>"16K"</entry>
+        <entry>PHP_INI_SYSTEM</entry>
+        <entry>Available since PHP 5.1.0.</entry>
+       </row>
+       <row>
+        <entry>realpath_cache_ttl</entry>
+        <entry>"120"</entry>
+        <entry>PHP_INI_SYSTEM</entry>
+        <entry>Available since PHP 5.1.0.</entry>
+       </row>
+      </tbody>
+     </tgroup>
+    </table>
+   </para>
+   &ini.descriptions.title;
+   <para>
+    <variablelist>
+     <varlistentry id="ini.realpath-cache-size">
+      <term>
+       <parameter>realpath_cache_size</parameter>
+       <type>integer</type>
+      </term>
+      <listitem>
+       <para>
+        Determines the size of the realpath cache to be used by PHP. This
+        value should be increased on systems where PHP opens many files, to
+        reflect the quantity of the file operations performed.
+       </para>
+      </listitem>
+     </varlistentry>
+     <varlistentry id="ini.realpath-cache-ttl">
+      <term>
+       <parameter>realpath_cache_ttl</parameter>
+       <type>integer</type>
+      </term>
+      <listitem>
+       <para>
+        Duration of time (in seconds) for which to cache realpath information
+        for a given file or directory. For systems with rarely changing files,
+        consider increasing the value.
+       </para>
+      </listitem>
+     </varlistentry>
+    </variablelist>
+   </para>
+  </section>
+
   <section id="ini.sect.data-handling">
    <title>Data Handling</title>
     <para>