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_ENV->get_mp_max_write()</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="memp.html" title="Chapter��8.�� The DB_MPOOLFILE Handle" /> 11 <link rel="prev" href="mempget_mp_max_openfd.html" title="DB_ENV->get_mp_max_openfd()" /> 12 <link rel="next" href="envget_mp_mmapsize.html" title="DB_ENV->get_mp_mmapsize()" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center">DB_ENV->get_mp_max_write()</th> 19 </tr> 20 <tr> 21 <td width="20%" align="left"><a accesskey="p" href="mempget_mp_max_openfd.html">Prev</a>��</td> 22 <th width="60%" align="center">Chapter��8.�� 23 The DB_MPOOLFILE Handle 24 </th> 25 <td width="20%" align="right">��<a accesskey="n" href="envget_mp_mmapsize.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="mempget_mp_max_write"></a>DB_ENV->get_mp_max_write()</h2> 35 </div> 36 </div> 37 </div> 38 <pre class="programlisting">#include <db.h> 39 40int 41DB_ENV->get_mp_max_write(DB_ENV *env, int *maxwritep, db_timeout_t *maxwrite_sleepp); </pre> 42 <p> 43 The <code class="methodname">DB_ENV->get_mp_max_write()</code> method returns the current maximum 44 number of sequential write operations and microseconds to pause that the library can schedule when flushing 45 dirty pages from the cache. These values are set by the 46 <a class="xref" href="mempset_mp_max_write.html" title="DB_ENV->set_mp_max_write()">DB_ENV->set_mp_max_write()</a> 47 method. 48 </p> 49 <p> 50 The <code class="methodname">DB_ENV->get_mp_max_write()</code> method may be called at any time 51 during the life of the application. 52 </p> 53 <p> 54 The <code class="methodname">DB_ENV->get_mp_max_write()</code> <span> 55 <span> 56 method returns a non-zero error value on failure and 0 on success. 57 </span> 58 59 </span> 60 </p> 61 <div class="sect2" lang="en" xml:lang="en"> 62 <div class="titlepage"> 63 <div> 64 <div> 65 <h3 class="title"><a id="id1685980"></a>Parameters</h3> 66 </div> 67 </div> 68 </div> 69 <div class="sect3" lang="en" xml:lang="en"> 70 <div class="titlepage"> 71 <div> 72 <div> 73 <h4 class="title"><a id="id1685986"></a>maxwritep</h4> 74 </div> 75 </div> 76 </div> 77 <p> 78 The <span class="bold"><strong>maxwritep</strong></span> parameter references 79 memory into which the maximum number of sequential write operations 80 is copied. 81 </p> 82 </div> 83 <div class="sect3" lang="en" xml:lang="en"> 84 <div class="titlepage"> 85 <div> 86 <div> 87 <h4 class="title"><a id="id1685942"></a>maxwrite_sleepp</h4> 88 </div> 89 </div> 90 </div> 91 <p> 92 The <span class="bold"><strong>maxwrite_sleepp</strong></span> parameter 93 references memory into which the microseconds to pause before 94 scheduling further write operations is copied. 95 </p> 96 </div> 97 </div> 98 <div class="sect2" lang="en" xml:lang="en"> 99 <div class="titlepage"> 100 <div> 101 <div> 102 <h3 class="title"><a id="id1685981"></a>Class</h3> 103 </div> 104 </div> 105 </div> 106 <p> 107 <a class="link" href="env.html" title="Chapter��5.�� The DB_ENV Handle">DB_ENV</a>, <a class="link" href="memp.html" title="Chapter��8.�� The DB_MPOOLFILE Handle">DB_MPOOLFILE</a> 108 </p> 109 </div> 110 <div class="sect2" lang="en" xml:lang="en"> 111 <div class="titlepage"> 112 <div> 113 <div> 114 <h3 class="title"><a id="id1685843"></a>See Also</h3> 115 </div> 116 </div> 117 </div> 118 <p> 119 <a class="xref" href="memp.html#memplist" title="Memory Pools and Related Methods">Memory Pools and Related Methods</a>, 120 <a class="xref" href="mempset_mp_max_write.html" title="DB_ENV->set_mp_max_write()">DB_ENV->set_mp_max_write()</a> 121 </p> 122 </div> 123 </div> 124 <div class="navfooter"> 125 <hr /> 126 <table width="100%" summary="Navigation footer"> 127 <tr> 128 <td width="40%" align="left"><a accesskey="p" href="mempget_mp_max_openfd.html">Prev</a>��</td> 129 <td width="20%" align="center"> 130 <a accesskey="u" href="memp.html">Up</a> 131 </td> 132 <td width="40%" align="right">��<a accesskey="n" href="envget_mp_mmapsize.html">Next</a></td> 133 </tr> 134 <tr> 135 <td width="40%" align="left" valign="top">DB_ENV->get_mp_max_openfd()��</td> 136 <td width="20%" align="center"> 137 <a accesskey="h" href="index.html">Home</a> 138 </td> 139 <td width="40%" align="right" valign="top">��DB_ENV->get_mp_mmapsize()</td> 140 </tr> 141 </table> 142 </div> 143 </body> 144</html> 145