svn commit - mysqldoc@docsrva: r1726 - trunk/refman-5.1

[jon]

Author: jstephens
Date: 2006-04-05 14:34:01 +0200 (Wed, 05 Apr 2006)
New Revision: 1726

Log:

Added some info about varsize attributes.



Modified:
   trunk/refman-5.1/ndbcluster.xml

Modified: trunk/refman-5.1/ndbcluster.xml
===================================================================
--- trunk/refman-5.1/ndbcluster.xml	2006-04-05 11:43:04 UTC (rev 1725)
+++ trunk/refman-5.1/ndbcluster.xml	2006-04-05 12:34:01 UTC (rev 1726)
@@ -3023,9 +3023,22 @@
               for each record is incurred because it is stored in a 32KB
               page with 128 byte page overhead (see below). There is
               also a small amount wasted per page due to the fact that
-              each record is stored in only one page. The maximum record
-              size is currently 8052 bytes.
+              each record is stored in only one page.
             </para>
+            
+            <para>
+              For variable-size table attributes in MySQL 5.1, the data
+              is stored on separate datapages, allocated from
+              <literal>DataMemory</literal>. Variable-length
+              records use a fixed-size part with an extra overhead of 4
+              bytes to reference the variable-size part. The
+              variable-size part has 2 bytes overhead plus 2 bytes per
+              attribute. 
+            </para>
+            
+            <para>
+              The maximum record size is currently 8052 bytes.
+            </para>
 
             <para>
               The memory space defined by <literal>DataMemory</literal>