svn commit - mysqldoc@docsrva: r8576 - in trunk: dynamic-docs/changelog refman-5.1

[jon]

Author: jstephens
Date: 2007-11-08 09:52:39 +0100 (Thu, 08 Nov 2007)
New Revision: 8576

Log:

Documented WL#3686 in changelog and cge-differences section

Added link to cge-6.3.6 changelog in cge-releases



Modified:
   trunk/dynamic-docs/changelog/mysqld.xml
   trunk/refman-5.1/mysql-cluster-cge.xml


Modified: trunk/dynamic-docs/changelog/mysqld.xml
===================================================================
--- trunk/dynamic-docs/changelog/mysqld.xml	2007-11-08 00:00:13 UTC (rev 8575)
+++ trunk/dynamic-docs/changelog/mysqld.xml	2007-11-08 08:52:39 UTC (rev 8576)
Changed blocks: 1, Lines Added: 28, Lines Deleted: 0; 1160 bytes

@@ -6,6 +6,34 @@
 ]>
 <changelog>
 
+  <logentry entrytype="feature">
+
+    <tags>
+      <highlight type="cluster"/>
+    </tags>
+
+    <versions>
+      <version ver="5.1.22-ndb-6.3.6"/>
+    </versions>
+
+    <message>
+
+      <para>
+        Unnecessary reads when performing a primary key or unique key
+        update have been reduced, and in some cases, eliminated. (It is
+        almost never necessary to read a record prior to an update, the
+        lone exception to this being when a primary key is updated,
+        since this requires a delete followed by an insert, which must
+        be prepared by reading the record.) Depending on the number of
+        primary key and unique key lookups that are performed per
+        transaction, this can yield a considerable improvement in
+        performance.
+      </para>
+
+    </message>
+
+  </logentry>
+
   <logentry entrytype="bug">
 
     <tags>


Modified: trunk/refman-5.1/mysql-cluster-cge.xml
===================================================================
--- trunk/refman-5.1/mysql-cluster-cge.xml	2007-11-08 00:00:13 UTC (rev 8575)
+++ trunk/refman-5.1/mysql-cluster-cge.xml	2007-11-08 08:52:39 UTC (rev 8576)
Changed blocks: 2, Lines Added: 16, Lines Deleted: 0; 1059 bytes

@@ -662,6 +662,16 @@
             </para>
           </listitem>
 
+          <listitem>
+            <para>
+              The number of unnecessary reads when performing a primary
+              key or unique key update has been greatly reduced. Since
+              it is seldom necessary to read a record prior to an
+              update, this can yield a considerable improvement in
+              performance. (MySQL 5.1.22-ndb-6.3.6)
+            </para>
+          </listitem>
+
         </itemizedlist>
       </para>
 

@@ -1003,6 +1013,12 @@
                 </para>
               </listitem>
 
+              <listitem>
+                <para>
+                  <xref linkend="news-5-1-22-ndb-6-3-6"/>
+                </para>
+              </listitem>
+
             </itemizedlist>
           </para>