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<th colspan="3" align="center">DbEnv::set_verbose()</th>
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<tr>
<td width="20%" align="left"><a accesskey="p" href="envset_tmp_dir.html">Prev</a> </td>
<th width="60%" align="center">Chapter 5.
The DbEnv Handle
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<div class="sect1" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h2 class="title" style="clear: both"><a id="envset_verbose"></a>DbEnv::set_verbose()</h2>
</div>
</div>
</div>
<pre class="programlisting">#include <db_cxx.h>
int
DbEnv::set_verbose(u_int32_t which, int onoff); </pre>
<p>
The <code class="methodname">DbEnv::set_verbose()</code> method turns specific additional
informational and debugging messages in the Berkeley DB message output
on and off. To see the additional messages, verbose messages must
also be configured for the application. For more information on
verbose messages, see the <a class="xref" href="envset_msgfile.html" title="DbEnv::set_msgfile()">DbEnv::set_msgfile()</a>
method.
</p>
<p>
The database environment's messages may also be configured using
the environment's <a href="../../programmer_reference/env_db_config.html#env_db_config.DB_CONFIG" class="olink">DB_CONFIG</a> file. The syntax of the entry in
that file is a single line with the string "set_verbose", one or
more whitespace characters, and the method
<span class="bold"><strong>which</strong></span> parameter as a string and
optionally one or more whitespace characters, and the string "on"
or "off". If the optional string is omitted, the default is "on";
for example, "set_verbose DB_VERB_RECOVERY" or "set_verbose
DB_VERB_RECOVERY on". Because the <a href="../../programmer_reference/env_db_config.html#env_db_config.DB_CONFIG" class="olink">DB_CONFIG</a> file is read when
the database environment is opened, it will silently overrule
configuration done before that time.
</p>
<p>
The <code class="methodname">DbEnv::set_verbose()</code> method configures operations performed
using the specified <a class="link" href="env.html" title="Chapter 5. The DbEnv Handle">DbEnv</a> handle, not all
operations performed on the underlying database environment.
</p>
<p>
The <code class="methodname">DbEnv::set_verbose()</code> method may be called at any time during the
life of the application.
</p>
<p>
The <code class="methodname">DbEnv::set_verbose()</code> <span>
<span>
method either returns a non-zero error value or throws an
exception that encapsulates a non-zero error value on
failure, and returns 0 on success.
</span>
</span>
</p>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="idp7713944"></a>Parameters</h3>
</div>
</div>
</div>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idp7713792"></a>which</h4>
</div>
</div>
</div>
<p>
The <span class="bold"><strong>which</strong></span> parameter must be set to
one of the following values:
</p>
<div class="itemizedlist">
<ul type="disc">
<li>
<p><a id="set_verbose_DB_VERB_DEADLOCK"></a>
<code class="literal">DB_VERB_DEADLOCK</code>
</p>
<p>
Display additional information when doing deadlock detection.
</p>
</li>
<li>
<p><a id="set_verbose_DB_VERB_FILEOPS"></a>
<code class="literal">DB_VERB_FILEOPS</code>
</p>
<p>
Display additional information when performing filesystem operations
such as open, close or rename. May not be available on all platforms.
</p>
</li>
<li>
<p><a id="set_verbose_DB_VERB_FILEOPS_ALL"></a>
<code class="literal">DB_VERB_FILEOPS_ALL</code>
</p>
<p>
Display additional information when performing all filesystem
operations, including read and write. May not be available on all
platforms.
</p>
</li>
<li>
<p><a id="set_verbose_DB_VERB_RECOVERY"></a>
<code class="literal">DB_VERB_RECOVERY</code>
</p>
<p>
Display additional information when performing recovery.
</p>
</li>
<li>
<p><a id="set_verbose_DB_VERB_REGISTER"></a>
<code class="literal">DB_VERB_REGISTER</code>
</p>
<p>
Display additional information concerning support for the
<a class="link" href="envopen.html#envopen_DB_REGISTER">DB_REGISTER</a> flag to
the <a class="xref" href="envopen.html" title="DbEnv::open()">DbEnv::open()</a>
method.
</p>
</li>
<li>
<p><a id="set_verbose_DB_VERB_REPLICATION"></a>
<code class="literal">DB_VERB_REPLICATION</code>
</p>
<p>
Display all detailed information about replication. This includes the
information displayed by all of the other DB_VERB_REP_* and
DB_VERB_REPMGR_* values.
</p>
</li>
<li>
<p><a id="set_verbose_DB_VERB_REP_ELECT"></a>
<code class="literal">DB_VERB_REP_ELECT</code>
</p>
<p>
Display detailed information about replication elections.
</p>
</li>
<li>
<p><a id="set_verbose_DB_VERB_REP_LEASE"></a>
<code class="literal">DB_VERB_REP_LEASE</code>
</p>
<p>
Display detailed information about replication master leases.
</p>
</li>
<li>
<p><a id="set_verbose_DB_VERB_REP_MISC"></a>
<code class="literal">DB_VERB_REP_MISC</code>
</p>
<p>
Display detailed information about general replication processing not
covered by the other DB_VERB_REP_* values.
</p>
</li>
<li>
<p><a id="set_verbose_DB_VERB_REP_MSGS"></a>
<code class="literal">DB_VERB_REP_MSGS</code>
</p>
<p>
Display detailed information about replication message processing.
</p>
</li>
<li>
<p><a id="set_verbose_DB_VERB_REP_SYNC"></a>
<code class="literal">DB_VERB_REP_SYNC</code>
</p>
<p>
Display detailed information about replication client synchronization.
</p>
</li>
<li>
<p><a id="set_verbose_DB_VERB_REP_SYSTEM"></a>
<code class="literal">DB_VERB_REP_SYSTEM</code>
</p>
<p>
Saves replication system information to a system-owned file. This value is on by default.
</p>
</li>
<li>
<p><a id="set_verbose_DB_VERB_REPMGR_CONNFAIL"></a>
<code class="literal">DB_VERB_REPMGR_CONNFAIL</code>
</p>
<p>
Display detailed information about Replication Manager connection
failures.
</p>
</li>
<li>
<p><a id="set_verbose_DB_VERB_REPMGR_MISC"></a>
<code class="literal">DB_VERB_REPMGR_MISC</code>
</p>
<p>
Display detailed information about general Replication Manager
processing.
</p>
</li>
<li>
<p><a id="set_verbose_DB_VERB_WAITSFOR"></a>
<code class="literal">DB_VERB_WAITSFOR</code>
</p>
<p>
Display the waits-for table when doing deadlock detection.
</p>
</li>
</ul>
</div>
</div>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idp7723656"></a>onoff</h4>
</div>
</div>
</div>
<p>
If the <span class="bold"><strong>onoff</strong></span> parameter is set to
non-zero, the additional messages are output.
</p>
</div>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="idp7697208"></a>Errors</h3>
</div>
</div>
</div>
<p>
The <code class="methodname">DbEnv::set_verbose()</code> <span>
<span>
method may fail and throw a <a class="link" href="dbexception.html" title="Chapter 6. The DbException Class">DbException</a>
exception, encapsulating one of the following non-zero errors, or return one
of the following non-zero errors:
</span>
</span>
</p>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idp7736392"></a>EINVAL</h4>
</div>
</div>
</div>
<p>
An invalid flag value or parameter was specified.
</p>
</div>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="idp7729456"></a>Class</h3>
</div>
</div>
</div>
<p>
<a class="link" href="env.html" title="Chapter 5. The DbEnv Handle">DbEnv</a>
</p>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="idp7737624"></a>See Also</h3>
</div>
</div>
</div>
<p>
<a class="xref" href="env.html#envlist" title="Database Environments and Related Methods">Database Environments and Related Methods</a>
</p>
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