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>Db::get_pagesize()</title> 7 <link rel="stylesheet" href="apiReference.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 C++ API Reference" /> 10 <link rel="up" href="db.html" title="Chapter 2. The Db Handle" /> 11 <link rel="prev" href="dbget_partition_keys.html" title="Db::get_partition_keys()" /> 12 <link rel="next" href="dbget_priority.html" title="Db::get_priority()" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center">Db::get_pagesize()</th> 19 </tr> 20 <tr> 21 <td width="20%" align="left"><a accesskey="p" href="dbget_partition_keys.html">Prev</a> </td> 22 <th width="60%" align="center">Chapter 2. 23 The Db Handle 24 </th> 25 <td width="20%" align="right"> <a accesskey="n" href="dbget_priority.html">Next</a></td> 26 </tr> 27 </table> 28 <hr /> 29 </div> 30 <div class="sect1" lang="en" xml:lang="en"> 31 <div class="titlepage"> 32 <div> 33 <div> 34 <h2 class="title" style="clear: both"><a id="dbget_pagesize"></a>Db::get_pagesize()</h2> 35 </div> 36 </div> 37 </div> 38 <pre class="programlisting">#include <db_cxx.h> 39 40int 41Db::get_pagesize(u_int32_t *pagesizep);</pre> 42 <p> 43 The <code class="methodname">Db::get_pagesize()</code> method returns the database's current page size, as 44 set by the <a class="xref" href="dbset_pagesize.html" title="Db::set_pagesize()">Db::set_pagesize()</a> 45 method. Note that if <code class="methodname">Db::set_pagesize()</code> was not called by your 46 application, then the default pagesize is selected based on the underlying filesystem I/O block size. 47 If you call <code class="methodname">Db::get_pagesize()</code> before you have opened the 48 database, the value returned by this method is therefore the underlying filesystem I/O block size. 49 </p> 50 <p> 51 The <code class="methodname">Db::get_pagesize()</code> method may be called only after the database has been opened. 52 </p> 53 <p> 54 The <code class="methodname">Db::get_pagesize()</code> <span> 55 56 <span> 57 method either returns a non-zero error value or throws an 58 exception that encapsulates a non-zero error value on 59 failure, and returns 0 on success. 60 </span> 61 </span> 62 </p> 63 <div class="sect2" lang="en" xml:lang="en"> 64 <div class="titlepage"> 65 <div> 66 <div> 67 <h3 class="title"><a id="id1637705"></a>Parameters</h3> 68 </div> 69 </div> 70 </div> 71 <div class="sect3" lang="en" xml:lang="en"> 72 <div class="titlepage"> 73 <div> 74 <div> 75 <h4 class="title"><a id="id1637612"></a>pagesizep</h4> 76 </div> 77 </div> 78 </div> 79 <p> 80 The <code class="methodname">Db::get_pagesize()</code> method returns the page size in <span class="bold"><strong>pagesizep</strong></span>. 81 </p> 82 </div> 83 </div> 84 <div class="sect2" lang="en" xml:lang="en"> 85 <div class="titlepage"> 86 <div> 87 <div> 88 <h3 class="title"><a id="id1637706"></a>Class</h3> 89 </div> 90 </div> 91 </div> 92 <p> 93 <a class="link" href="db.html" title="Chapter 2. The Db Handle">Db</a> 94 </p> 95 </div> 96 <div class="sect2" lang="en" xml:lang="en"> 97 <div class="titlepage"> 98 <div> 99 <div> 100 <h3 class="title"><a id="id1637444"></a>See Also</h3> 101 </div> 102 </div> 103 </div> 104 <p> 105 <a class="xref" href="db.html#dblist" title="Database and Related Methods">Database and Related Methods</a>, 106 <a class="xref" href="dbset_pagesize.html" title="Db::set_pagesize()">Db::set_pagesize()</a> 107 </p> 108 </div> 109 </div> 110 <div class="navfooter"> 111 <hr /> 112 <table width="100%" summary="Navigation footer"> 113 <tr> 114 <td width="40%" align="left"><a accesskey="p" href="dbget_partition_keys.html">Prev</a> </td> 115 <td width="20%" align="center"> 116 <a accesskey="u" href="db.html">Up</a> 117 </td> 118 <td width="40%" align="right"> <a accesskey="n" href="dbget_priority.html">Next</a></td> 119 </tr> 120 <tr> 121 <td width="40%" align="left" valign="top">Db::get_partition_keys() </td> 122 <td width="20%" align="center"> 123 <a accesskey="h" href="index.html">Home</a> 124 </td> 125 <td width="40%" align="right" valign="top"> Db::get_priority()</td> 126 </tr> 127 </table> 128 </div> 129 </body> 130</html> 131