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<h1>Diagnostics</h1>
<p>Db4o engine provides user with a special mechanism showing runtime diagnostics information. This functionality can become your guide to excellent performance and low memory consumption.<br>
Diagnostics can be switched on in the configuration before opening the database file:</p>
<span name="cs_wiki_filter" csw_filters="net">
<p>.NET: </p><p><code>configuration.Diagnostic().AddListener(new DiagnosticListener())</code></p>
</span>
<p>where DiagnosticListener is a callback interface tracking diagnostic messages from different parts of the system:</p>
<p><code>public interface DiagnosticListener {<br>
public void onDiagnostic(Diagnostic d);<br>
}</code><br>
</p>
<p>Db4o provides 2 different listeners:</p>
<ul>
<li>
DiagnosticToConsole (Java, prints diagnostic messages to the console);</li>
<li>DiagnosticToTrace (.NET, prints diagnostic messages to the debug output window).</li>
</ul>
<p>Every diagnostic message is represented by it's own type, all possible types can be found in the com.db4o.diagnostic package/namespace.</p>
<p>At the present moment the following diagnostic classes are implemented:</p>
<ul>
<li>
ClassHasNoFields </li>
<li>LoadedFromClassIndex </li>
<li>NativeQueryNotOptimized </li>
<li>UpdateDepthGreaterOne</li>
<li>DescendIntoTranslator</li>
</ul><div class="childTopicList">More Reading:<ul>
<li><p><a href="diagnostics/classhasnofields.html" class="wikiLink">ClassHasNoFields</a></p></li>
<li><p><a href="diagnostics/loadedfromclassindex.html" class="wikiLink">LoadedFromClassIndex</a></p></li>
<li><p><a href="diagnostics/nativequerynotoptimized.html" class="wikiLink">NativeQueryNotOptimized</a></p></li>
<li><p><a href="diagnostics/updatedepthgreaterone.html" class="wikiLink">UpdateDepthGreaterOne</a></p></li>
<li><p><a href="diagnostics/diagnostic_messages_filter.html" class="wikiLink">Diagnostic Messages Filter</a></p></li>
<li><p><a href="diagnostics/descendintotranslator.html" class="wikiLink">DescendIntoTranslator</a></p></li>
</ul></div>
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This revision (6) was last Modified 2007-05-07T16:57:08 by Tetyana.
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