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<h1><a name="kanchor123"></a><a name="kanchor124"></a>Runtime Monitoring</h1>
<p>The db4o runtime statistics is a monitoring feature allowing to collect various important runtime data. This data can be crucial in resolving performance issues, analyzing usage patterns, predicting resource bottlenecks etc. Runtime Statistics can be collected both in the application testing stage and in an application deployed to production system. In the first case this data can help to estimate hardware requirements and analyze the stability of the system. In the latter case, the data can be used to fine-tune performance, find problems and fix bugs. Take a look how you install the statistics and monitor them.</p>
<h2>Install And Monitor</h2>
<p MadCap:conditions="Primary..NET">On the .NET platform all runtime statistics are published through the Windows Performance Counters. This means that you can use the regular windows tooling to monitor db4o statistics. <a href="Runtime_Statistics/install_and_monitor.htm" target="" title="" alt="" class="MCXref" xrefformat="See "{paratext}"">See "Install and Monitor"</a></p>
<h2>Available Statistics</h2>
<p>Currently following statistics are available. </p>
<ul>
<li value="1"><a href="Runtime_Statistics/monitor_queries.htm">Query Monitoring</a>: Monitor how queries behave and perform.</li>
<li value="2"><a href="Runtime_Statistics/monitor_object_lifecycle.htm">Object Lifecycle Monitoring</a>: Monitor how many objects are stored, deleted and activated.</li>
<li value="3"><a href="Runtime_Statistics/monitor_io.htm">IO Monitoring</a>: Monitor the IO-operations of db4o.</li>
<li value="4"><a href="Runtime_Statistics/monitor_network.htm">Network Monitoring</a>: Monitor the network operations of db4o.</li>
<li value="5"><a href="Runtime_Statistics/monitor_reference_system.htm">Reference System Monitoring</a>: Monitor db4o's reference system.</li>
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