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<h1>DbEnv::set_verbose</h1>
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<h3><pre>
#include <db_cxx.h>
<p>
int
DbEnv::set_verbose(u_int32_t which, int onoff);
</pre></h3>
<h1>Description</h1>
<p>The DbEnv::set_verbose method turns additional informational and
debugging messages in the Berkeley DB message output on and off. If
<b>onoff</b> is set to
non-zero,
the additional messages are output.
<p>The <b>which</b> parameter must be set to one of the following values:
<p><dl compact>
<p><dt><a name="DB_VERB_CHKPOINT">DB_VERB_CHKPOINT</a><dd>Display checkpoint location information when searching the log for
checkpoints.
<p><dt><a name="DB_VERB_DEADLOCK">DB_VERB_DEADLOCK</a><dd>Display additional information when doing deadlock detection.
<p><dt><a name="DB_VERB_RECOVERY">DB_VERB_RECOVERY</a><dd>Display additional information when performing recovery.
<p><dt><a name="DB_VERB_WAITSFOR">DB_VERB_WAITSFOR</a><dd>Display the waits-for table when doing deadlock detection.
</dl>
<p>The DbEnv::set_verbose interface may be used to configure Berkeley DB at any time
during the life of the application.
<p>The DbEnv::set_verbose 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.
<p>The database environment's verbosity may also be set using the environment's
<b>DB_CONFIG</b> 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 interface <b>which</b> argument as a string, for example,
"set_verbose DB_VERB_CHKPOINT". Because the <b>DB_CONFIG</b> file is read when the database
environment is opened, it will silently overrule configuration done
before that time.
<h1>Errors</h1>
<p><dl compact>
<p><dt>EINVAL<dd>An invalid flag value or parameter was specified.
</dl>
<h3>Class</h3>
<a href="../api_cxx/dbenv_class.html">DbEnv</a>
<h1>See Also</h1>
<a href="../api_cxx/env_close.html">DbEnv::close</a>,
<a href="../api_cxx/env_open.html">DbEnv::open</a>,
<a href="../api_cxx/env_remove.html">DbEnv::remove</a>,
<a href="../api_cxx/db_err.html">DbEnv::err</a>,
<a href="../api_cxx/env_strerror.html">DbEnv::strerror</a>,
<a href="../api_cxx/env_version.html">DbEnv::version</a>,
<a href="../api_cxx/env_set_cachesize.html">DbEnv::set_cachesize</a>,
<a href="../api_cxx/env_set_errcall.html">DbEnv::set_errcall</a>,
<a href="../api_cxx/env_set_errfile.html">DbEnv::set_errfile</a>,
<a href="../api_cxx/env_set_error_stream.html">DbEnv::set_error_stream</a>,
<a href="../api_cxx/env_set_errpfx.html">DbEnv::set_errpfx</a>,
<a href="../api_cxx/env_set_flags.html">DbEnv::set_flags</a>,
<a href="../api_cxx/env_set_mutexlocks.html">DbEnv::set_mutexlocks</a>,
<a href="../api_cxx/env_set_paniccall.html">DbEnv::set_paniccall</a>,
and
<a href="../api_cxx/env_set_verbose.html">DbEnv::set_verbose</a>.
</tt>
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