1<?xml version="1.0" encoding="UTF-8" standalone="no"?> 2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 3<html xmlns="http://www.w3.org/1999/xhtml"> 4 <head> 5 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> 6 <title>Release 4.4: DB_MPOOLFILE->set_clear_len</title> 7 <link rel="stylesheet" href="gettingStarted.css" type="text/css" /> 8 <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> 9 <link rel="start" href="index.html" title="Berkeley DB Programmer's Reference Guide" /> 10 <link rel="up" href="upgrade_4_4_toc.html" title="Chapter��41.��Upgrading Berkeley DB 4.3 applications to Berkeley DB 4.4" /> 11 <link rel="prev" href="upgrade_4_4_mutex.html" title="Release 4.4: mutexes" /> 12 <link rel="next" href="upgrade_4_4_lockstat.html" title="Release 4.4: lock statistics" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center">Release 4.4: DB_MPOOLFILE->set_clear_len</th> 19 </tr> 20 <tr> 21 <td width="20%" align="left"><a accesskey="p" href="upgrade_4_4_mutex.html">Prev</a>��</td> 22 <th width="60%" align="center">Chapter��41.��Upgrading Berkeley DB 4.3 applications to Berkeley DB 4.4</th> 23 <td width="20%" align="right">��<a accesskey="n" href="upgrade_4_4_lockstat.html">Next</a></td> 24 </tr> 25 </table> 26 <hr /> 27 </div> 28 <div class="sect1" lang="en" xml:lang="en"> 29 <div class="titlepage"> 30 <div> 31 <div> 32 <h2 class="title" style="clear: both"><a id="upgrade_4_4_clear"></a>Release 4.4: DB_MPOOLFILE->set_clear_len</h2> 33 </div> 34 </div> 35 </div> 36 <p>The meaning of a 0 "clear length" argument to the 37<a href="../api_reference/C/mempset_clear_len.html" class="olink">DB_MPOOLFILE->set_clear_len()</a> method changed in the Berkeley DB 4.4 release. In 38previous releases, specifying a length of 0 was equivalent to the 39default, and the entire created page was cleared. Unfortunately, this 40left no way to specify that no part of the page needed to be cleared. 41In the 4.4 release, specifying a "clear length" argument of 0 means that 42no part of the page need be cleared.</p> 43 <p>Applications specifying a 0 "clear length" argument to the 44<a href="../api_reference/C/mempset_clear_len.html" class="olink">DB_MPOOLFILE->set_clear_len()</a> method should simply remove the call, as the 45default behavior is to clear the entire created page.</p> 46 </div> 47 <div class="navfooter"> 48 <hr /> 49 <table width="100%" summary="Navigation footer"> 50 <tr> 51 <td width="40%" align="left"><a accesskey="p" href="upgrade_4_4_mutex.html">Prev</a>��</td> 52 <td width="20%" align="center"> 53 <a accesskey="u" href="upgrade_4_4_toc.html">Up</a> 54 </td> 55 <td width="40%" align="right">��<a accesskey="n" href="upgrade_4_4_lockstat.html">Next</a></td> 56 </tr> 57 <tr> 58 <td width="40%" align="left" valign="top">Release 4.4: mutexes��</td> 59 <td width="20%" align="center"> 60 <a accesskey="h" href="index.html">Home</a> 61 </td> 62 <td width="40%" align="right" valign="top">��Release 4.4: lock statistics</td> 63 </tr> 64 </table> 65 </div> 66 </body> 67</html> 68