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<h1><a name="kanchor74"></a>System Info</h1>
<p>You can ask the object container for basic system information. Following information can be accessed:</p>
<h2>Freespace Size</h2>
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<pre class="prettyprint" xml:space="preserve">long freeSpaceSize = container.Ext().SystemInfo().FreespaceSize();
Console.WriteLine("Freespace in bytes: {0}", freeSpaceSize);</pre>
<div class="codesnippet-meta">SystemInfoExamples.cs: Freespace size info
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<pre class="prettyprint lang-vb" MadCap:conditions="Primary.Online" xml:space="preserve">Dim freeSpaceSize As Long = container.Ext().SystemInfo().FreespaceSize()
Console.WriteLine("Freespace in bytes: {0}", freeSpaceSize)</pre>
<div class="codesnippet-meta">SystemInfoExamples.vb: Freespace size info
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<p>Returns the freespace size in the database
in bytes. When db4o stores modified objects, it allocates a new slot for it.
During commit the old slot is freed. Free slots are collected in the
freespace manager, so they can be reused for other objects.</p>
<p>This method returns a sum of the size of all
free slots in the database file.</p>
<p>To reclaim
freespace run <a href="defragment.htm">Defragment</a>.</p>
<h2>Freespace Entry Count</h2>
<div class="codesnippet" MadCap:conditions="Primary.c#">
<pre class="prettyprint" xml:space="preserve">int freeSpaceEntries = container.Ext().SystemInfo().FreespaceEntryCount();
Console.WriteLine("Freespace-entries count: {0}", freeSpaceEntries);</pre>
<div class="codesnippet-meta">SystemInfoExamples.cs: Freespace entry count info
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<pre class="prettyprint lang-vb" MadCap:conditions="Primary.Online" xml:space="preserve">Dim freeSpaceEntries As Integer = container.Ext().SystemInfo().FreespaceEntryCount()
Console.WriteLine("Freespace-entries count: {0}", freeSpaceEntries)</pre>
<div class="codesnippet-meta">SystemInfoExamples.vb: Freespace entry count info
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<p>Returns the number
of entries in the Freespace Manager.A high value for the number of
freespace entries is an indication that the database is fragmented and that
<a href="defragment.htm">Defragment</a> should be run.</p>
<h2>Total Size</h2>
<div class="codesnippet" MadCap:conditions="Primary.c#">
<pre class="prettyprint" xml:space="preserve">long databaseSize = container.Ext().SystemInfo().TotalSize();
Console.WriteLine("Database size: {0}", databaseSize);</pre>
<div class="codesnippet-meta">SystemInfoExamples.cs: Database size info
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<pre class="prettyprint lang-vb" MadCap:conditions="Primary.Online" xml:space="preserve">Dim databaseSize As Long = container.Ext().SystemInfo().TotalSize()</pre>
<div class="codesnippet-meta">SystemInfoExamples.vb: Database size info
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<p>Returns the total
size of the database on disk.</p>
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