668 lines
26 KiB
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668 lines
26 KiB
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<div class="aboutLanguage"><b>Berkeley DB Java Edition</b><br><font size=\"-1\"> version 7.5.11</font>
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<div class="subTitle">com.sleepycat.je</div>
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<h2 title="Class BtreeStats" class="title">Class BtreeStats</h2>
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<li>java.lang.Object</li>
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<li><a href="../../../com/sleepycat/je/DatabaseStats.html" title="class in com.sleepycat.je">com.sleepycat.je.DatabaseStats</a></li>
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<dd>java.io.Serializable</dd>
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<br>
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<pre>public class <span class="typeNameLabel">BtreeStats</span>
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extends <a href="../../../com/sleepycat/je/DatabaseStats.html" title="class in com.sleepycat.je">DatabaseStats</a></pre>
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<div class="block">The BtreeStats object is used to return Btree database statistics.</div>
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<dl>
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<dt><span class="seeLabel">See Also:</span></dt>
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<dd><a href="../../../serialized-form.html#com.sleepycat.je.BtreeStats">Serialized Form</a></dd>
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<th class="colOne" scope="col">Constructor and Description</th>
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<tr class="altColor">
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/BtreeStats.html#BtreeStats--">BtreeStats</a></span>()</code> </td>
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<h3>Method Summary</h3>
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<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span><span id="t6" class="tableTab"><span><a href="javascript:show(32);">Deprecated Methods</a></span><span class="tabEnd"> </span></span></caption>
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<tr>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colLast" scope="col">Method and Description</th>
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</tr>
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<tr id="i0" class="altColor">
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<td class="colFirst"><code>long[]</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/BtreeStats.html#getBINEntriesHistogram--">getBINEntriesHistogram</a></span>()</code>
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<div class="block">Returns an array representing a histogram of the number of Bottom
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Internal Nodes with various percentages of non-deleted entry counts.</div>
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</td>
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</tr>
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<tr id="i1" class="rowColor">
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<td class="colFirst"><code>long[]</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/BtreeStats.html#getBINsByLevel--">getBINsByLevel</a></span>()</code>
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<div class="block">Returns the count of Bottom Internal Nodes per level, indexed by level.</div>
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</td>
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</tr>
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<tr id="i2" class="altColor">
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<td class="colFirst"><code>long</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/BtreeStats.html#getBottomInternalNodeCount--">getBottomInternalNodeCount</a></span>()</code>
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<div class="block">Returns the number of Bottom Internal Nodes in the database tree.</div>
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</td>
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</tr>
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<tr id="i3" class="rowColor">
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<td class="colFirst"><code>long[]</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/BtreeStats.html#getDBINsByLevel--">getDBINsByLevel</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span>
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<div class="block"><span class="deprecationComment">as of 5.0, returns an empty array.</span></div>
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</div>
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</td>
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</tr>
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<tr id="i4" class="altColor">
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<td class="colFirst"><code>long</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/BtreeStats.html#getDeletedLeafNodeCount--">getDeletedLeafNodeCount</a></span>()</code>
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<div class="block">Returns the number of deleted data records in the database tree that
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are pending removal by the compressor.</div>
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</td>
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</tr>
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<tr id="i5" class="rowColor">
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<td class="colFirst"><code>long[]</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/BtreeStats.html#getDINsByLevel--">getDINsByLevel</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span>
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<div class="block"><span class="deprecationComment">as of 5.0, returns an empty array.</span></div>
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</div>
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</td>
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</tr>
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<tr id="i6" class="altColor">
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<td class="colFirst"><code>long</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/BtreeStats.html#getDupCountLeafNodeCount--">getDupCountLeafNodeCount</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span>
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<div class="block"><span class="deprecationComment">as of 5.0, returns zero.</span></div>
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</div>
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</td>
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</tr>
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<tr id="i7" class="rowColor">
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<td class="colFirst"><code>long</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/BtreeStats.html#getDuplicateBottomInternalNodeCount--">getDuplicateBottomInternalNodeCount</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span>
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<div class="block"><span class="deprecationComment">as of 5.0, returns zero.</span></div>
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</div>
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</td>
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</tr>
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<tr id="i8" class="altColor">
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<td class="colFirst"><code>long</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/BtreeStats.html#getDuplicateInternalNodeCount--">getDuplicateInternalNodeCount</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span>
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<div class="block"><span class="deprecationComment">as of 5.0, returns zero.</span></div>
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</div>
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</td>
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</tr>
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<tr id="i9" class="rowColor">
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<td class="colFirst"><code>int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/BtreeStats.html#getDuplicateTreeMaxDepth--">getDuplicateTreeMaxDepth</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span>
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<div class="block"><span class="deprecationComment">as of 5.0, returns zero.</span></div>
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</div>
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</td>
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</tr>
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<tr id="i10" class="altColor">
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<td class="colFirst"><code>long[]</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/BtreeStats.html#getINsByLevel--">getINsByLevel</a></span>()</code>
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<div class="block">Returns the count of Internal Nodes per level, indexed by level.</div>
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</td>
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</tr>
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<tr id="i11" class="rowColor">
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<td class="colFirst"><code>long</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/BtreeStats.html#getInternalNodeCount--">getInternalNodeCount</a></span>()</code>
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<div class="block">Returns the number of Internal Nodes in the database tree.</div>
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</td>
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</tr>
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<tr id="i12" class="altColor">
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<td class="colFirst"><code>long</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/BtreeStats.html#getLeafNodeCount--">getLeafNodeCount</a></span>()</code>
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<div class="block">Returns the number of leaf nodes in the database tree, which can equal
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the number of records.</div>
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</td>
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</tr>
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<tr id="i13" class="rowColor">
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<td class="colFirst"><code>int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/BtreeStats.html#getMainTreeMaxDepth--">getMainTreeMaxDepth</a></span>()</code>
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<div class="block">Returns the maximum depth of the main database tree.</div>
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</td>
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</tr>
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<tr id="i14" class="altColor">
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<td class="colFirst"><code>long</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/BtreeStats.html#getRelatches--">getRelatches</a></span>()</code>
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<div class="block">Returns the number of latch upgrades (relatches) required while
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operating on this database's BTree.</div>
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</td>
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</tr>
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<tr id="i15" class="rowColor">
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<td class="colFirst"><code>int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/BtreeStats.html#getRootSplits--">getRootSplits</a></span>()</code>
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<div class="block">The number of times the root of the BTree was split.</div>
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</td>
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</tr>
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<tr id="i16" class="altColor">
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<td class="colFirst"><code>java.lang.String</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/BtreeStats.html#toString--">toString</a></span>()</code>
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<div class="block">For convenience, the BtreeStats class has a toString method that lists
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all the data fields.</div>
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</td>
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</tr>
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<tr id="i17" class="rowColor">
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<td class="colFirst"><code>java.lang.String</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/BtreeStats.html#toStringVerbose--">toStringVerbose</a></span>()</code> </td>
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<h3>Methods inherited from class java.lang.Object</h3>
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<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</code></li>
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</ul>
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<h3>Constructor Detail</h3>
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<a name="BtreeStats--">
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<h4>BtreeStats</h4>
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<pre>public BtreeStats()</pre>
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<h4>getBottomInternalNodeCount</h4>
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<pre>public long getBottomInternalNodeCount()</pre>
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<div class="block">Returns the number of Bottom Internal Nodes in the database tree.
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<p>The information is included only if the <a href="../../../com/sleepycat/je/Database.html#getStats-com.sleepycat.je.StatsConfig-"><code>Database.getStats</code></a> call was not
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configured by the <a href="../../../com/sleepycat/je/StatsConfig.html#setFast-boolean-"><code>StatsConfig.setFast</code></a> method.</p></div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>number of Bottom Internal Nodes in the database tree.</dd>
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</dl>
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<h4>getDuplicateBottomInternalNodeCount</h4>
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<pre>public long getDuplicateBottomInternalNodeCount()</pre>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> <span class="deprecationComment">as of 5.0, returns zero.</span></div>
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</li>
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<a name="getDeletedLeafNodeCount--">
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<h4>getDeletedLeafNodeCount</h4>
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<pre>public long getDeletedLeafNodeCount()</pre>
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<div class="block">Returns the number of deleted data records in the database tree that
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are pending removal by the compressor.
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<p>The information is included only if the <a href="../../../com/sleepycat/je/Database.html#getStats-com.sleepycat.je.StatsConfig-"><code>Database.getStats</code></a> call was not
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configured by the <a href="../../../com/sleepycat/je/StatsConfig.html#setFast-boolean-"><code>StatsConfig.setFast</code></a> method.</p></div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>number of deleted data records in the database tree that are
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pending removal by the compressor.</dd>
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</dl>
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</li>
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</ul>
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<a name="getDupCountLeafNodeCount--">
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<h4>getDupCountLeafNodeCount</h4>
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<pre>public long getDupCountLeafNodeCount()</pre>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> <span class="deprecationComment">as of 5.0, returns zero.</span></div>
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</li>
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<pre>public long getInternalNodeCount()</pre>
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<div class="block">Returns the number of Internal Nodes in the database tree.
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<p>The information is included only if the <a href="../../../com/sleepycat/je/Database.html#getStats-com.sleepycat.je.StatsConfig-"><code>Database.getStats</code></a> call was not
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configured by the <a href="../../../com/sleepycat/je/StatsConfig.html#setFast-boolean-"><code>StatsConfig.setFast</code></a> method.</p></div>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>number of Internal Nodes in the database tree.</dd>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> <span class="deprecationComment">as of 5.0, returns zero.</span></div>
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<pre>public long getLeafNodeCount()</pre>
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<div class="block">Returns the number of leaf nodes in the database tree, which can equal
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the number of records. This is calculated without locks or transactions,
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and therefore is only an accurate count of the current number of records
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when the database is quiescent.
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<p>The information is included only if the <a href="../../../com/sleepycat/je/Database.html#getStats-com.sleepycat.je.StatsConfig-"><code>Database.getStats</code></a> call was not
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configured by the <a href="../../../com/sleepycat/je/StatsConfig.html#setFast-boolean-"><code>StatsConfig.setFast</code></a> method.</p></div>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>number of leaf nodes in the database tree, which can equal the
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number of records. This is calculated without locks or transactions, and
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therefore is only an accurate count of the current number of records
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when the database is quiescent.</dd>
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<pre>public int getMainTreeMaxDepth()</pre>
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<div class="block">Returns the maximum depth of the main database tree.
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<p>The information is included only if the <a href="../../../com/sleepycat/je/Database.html#getStats-com.sleepycat.je.StatsConfig-"><code>Database.getStats</code></a> call was not
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configured by the <a href="../../../com/sleepycat/je/StatsConfig.html#setFast-boolean-"><code>StatsConfig.setFast</code></a> method.</p></div>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>maximum depth of the main database tree.</dd>
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<pre>public int getDuplicateTreeMaxDepth()</pre>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> <span class="deprecationComment">as of 5.0, returns zero.</span></div>
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</li>
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<a name="getINsByLevel--">
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<h4>getINsByLevel</h4>
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<pre>public long[] getINsByLevel()</pre>
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<div class="block">Returns the count of Internal Nodes per level, indexed by level.
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<p>The information is included only if the <a href="../../../com/sleepycat/je/Database.html#getStats-com.sleepycat.je.StatsConfig-"><code>Database.getStats</code></a> call was not
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configured by the <a href="../../../com/sleepycat/je/StatsConfig.html#setFast-boolean-"><code>StatsConfig.setFast</code></a> method.</p></div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>count of Internal Nodes per level, indexed by level.</dd>
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<pre>public long[] getBINsByLevel()</pre>
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<div class="block">Returns the count of Bottom Internal Nodes per level, indexed by level.
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<p>The information is included only if the <a href="../../../com/sleepycat/je/Database.html#getStats-com.sleepycat.je.StatsConfig-"><code>Database.getStats</code></a> call was not
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configured by the <a href="../../../com/sleepycat/je/StatsConfig.html#setFast-boolean-"><code>StatsConfig.setFast</code></a> method.</p></div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>count of Bottom Internal Nodes per level, indexed by level.</dd>
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<pre>public long[] getBINEntriesHistogram()</pre>
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<div class="block">Returns an array representing a histogram of the number of Bottom
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Internal Nodes with various percentages of non-deleted entry counts.
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The array is 10 elements and each element represents a range of 10%.
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<pre>
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element [0]: # BINs with 0% to 9% entries used by non-deleted values
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element [1]: # BINs with 10% to 19% entries used by non-deleted values
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element [2]: # BINs with 20% to 29% entries used by non-deleted values
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...
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element [0]: # BINs with 90% to 100% entries used by non-deleted values
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</pre></div>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>an array representing a histogram of the number of BINs with
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various percentages of non-deleted entries.</dd>
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<a name="getDINsByLevel--">
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<h4>getDINsByLevel</h4>
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<pre>public long[] getDINsByLevel()</pre>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> <span class="deprecationComment">as of 5.0, returns an empty array.</span></div>
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<pre>public long[] getDBINsByLevel()</pre>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> <span class="deprecationComment">as of 5.0, returns an empty array.</span></div>
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<h4>getRelatches</h4>
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<pre>public long getRelatches()</pre>
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<div class="block">Returns the number of latch upgrades (relatches) required while
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operating on this database's BTree. Latch upgrades are required when an
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operation assumes that a shared (read) latch will be sufficient but
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later determines that an exclusive (write) latch will actually be
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required.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>number of latch upgrades (relatches) required.</dd>
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<h4>getRootSplits</h4>
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<pre>public int getRootSplits()</pre>
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<div class="block">The number of times the root of the BTree was split.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>number of times the root was split.</dd>
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<h4>toString</h4>
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<pre>public java.lang.String toString()</pre>
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<div class="block">For convenience, the BtreeStats class has a toString method that lists
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all the data fields.</div>
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<dl>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
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<dd><code>toString</code> in class <code>java.lang.Object</code></dd>
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</dl>
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</li>
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<pre>public java.lang.String toStringVerbose()</pre>
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<div class="aboutLanguage"><b>Berkeley DB Java Edition</b><br><font size=\"-1\"> version 7.5.11</font>
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