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<head><title>Activation Depth</title>
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<h1>Activation Depth</h1>
<p>db4o uses the concept of <a href="../../basics/activation.htm">activation</a> to avoid loading to much data into memory. You can change the global activation depth with this setting.</p>
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<pre class="prettyprint" xml:space="preserve">IEmbeddedConfiguration configuration = Db4oEmbedded.NewConfiguration();
configuration.Common.ActivationDepth = 2;</pre>
<div class="codesnippet-meta">CommonConfigurationExamples.cs: Change activation depth
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<pre class="prettyprint lang-vb" MadCap:conditions="Primary.Online" xml:space="preserve">Dim configuration As IEmbeddedConfiguration = Db4oEmbedded.NewConfiguration()
configuration.Common.ActivationDepth = 2</pre>
<div class="codesnippet-meta">CommonConfigurationExamples.vb: Change activation depth
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<p>A higher activation depth is usually more convenient to work with, because you don't face inactivated objects. However, a higher activation depth costs performance, because more data has to read from the database. Therefore a good balance need to be found. Take also a look a <a href="../../basics/activation_concept/transparent_activation_framework.htm">transparent activation</a>, since it solves the activation issue completely. </p>
<h2>Class Specific Configuration</h2>
<p>You can also configure a class specific activation depth. <a href="../objectclass_configuration.htm" target="" title="" alt="" class="MCXref">See "Class Specific Configuration"</a></p>
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<pre class="prettyprint" xml:space="preserve">IEmbeddedConfiguration configuration = Db4oEmbedded.NewConfiguration();
configuration.Common.ObjectClass(typeof (Person)).MinimumActivationDepth(2);</pre>
<div class="codesnippet-meta">ObjectConfigurationExamples.cs: Set minimum activation depth
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<pre class="prettyprint lang-vb" MadCap:conditions="Primary.Online" xml:space="preserve">Dim configuration As IEmbeddedConfiguration = Db4oEmbedded.NewConfiguration()
configuration.Common.ObjectClass(GetType(Person)).MinimumActivationDepth(2)</pre>
<div class="codesnippet-meta">ObjectConfigurationExamples.vb: Set minimum activation depth
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