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>DbEnv::get_tx_max()</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="txn.html" title="Chapter 13. The DbTxn Handle" /> 11 <link rel="prev" href="envcdsgroup_begin.html" title="DbEnv::cdsgroup_begin()" /> 12 <link rel="next" href="envget_tx_timestamp.html" title="DbEnv::get_tx_timestamp()" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center">DbEnv::get_tx_max()</th> 19 </tr> 20 <tr> 21 <td width="20%" align="left"><a accesskey="p" href="envcdsgroup_begin.html">Prev</a> </td> 22 <th width="60%" align="center">Chapter 13. 23 The DbTxn Handle 24 </th> 25 <td width="20%" align="right"> <a accesskey="n" href="envget_tx_timestamp.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="envget_tx_max"></a>DbEnv::get_tx_max()</h2> 35 </div> 36 </div> 37 </div> 38 <pre class="programlisting">#include <db_cxx.h> 39 40int 41DbEnv::get_tx_max(u_int32_t *tx_maxp);</pre> 42 <p> 43 The <code class="methodname">DbEnv::get_tx_max()</code> method returns the maximum number of active 44 transactions currently configured for the environment. You can manage this value using 45 the <a class="xref" href="envset_tx_max.html" title="DbEnv::set_tx_max()">DbEnv::set_tx_max()</a> method. 46 </p> 47 <p> 48 The <code class="methodname">DbEnv::get_tx_max()</code> method may be called at any time during the 49 life of the application. 50 </p> 51 <p> 52 The <code class="methodname">DbEnv::get_tx_max()</code> <span> 53 54 <span> 55 method either returns a non-zero error value or throws an 56 exception that encapsulates a non-zero error value on 57 failure, and returns 0 on success. 58 </span> 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="id1712191"></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="id1712050"></a>tx_maxp</h4> 74 </div> 75 </div> 76 </div> 77 <p> 78 The <code class="methodname">DbEnv::get_tx_max()</code> method returns the number of active 79 transactions in <span class="bold"><strong>tx_maxp</strong></span>. 80 </p> 81 </div> 82 </div> 83 <div class="sect2" lang="en" xml:lang="en"> 84 <div class="titlepage"> 85 <div> 86 <div> 87 <h3 class="title"><a id="id1712835"></a>Class</h3> 88 </div> 89 </div> 90 </div> 91 <p> 92 <a class="link" href="env.html" title="Chapter 5. The DbEnv Handle">DbEnv</a>, 93 <a class="link" href="txn.html" title="Chapter 13. The DbTxn Handle">DbTxn</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="id1712772"></a>See Also</h3> 101 </div> 102 </div> 103 </div> 104 <p> 105 <a class="xref" href="txn.html#txnlist" title="Transaction Subsystem and Related Methods">Transaction Subsystem and Related Methods</a>, 106 <a class="xref" href="envset_tx_max.html" title="DbEnv::set_tx_max()">DbEnv::set_tx_max()</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="envcdsgroup_begin.html">Prev</a> </td> 115 <td width="20%" align="center"> 116 <a accesskey="u" href="txn.html">Up</a> 117 </td> 118 <td width="40%" align="right"> <a accesskey="n" href="envget_tx_timestamp.html">Next</a></td> 119 </tr> 120 <tr> 121 <td width="40%" align="left" valign="top">DbEnv::cdsgroup_begin() </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"> DbEnv::get_tx_timestamp()</td> 126 </tr> 127 </table> 128 </div> 129 </body> 130</html> 131