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stasis/je-7.5.11/docs/java/com/sleepycat/je/BtreeStats.html
Greg Burd 1d088e4a23 initial import
2019-06-25 16:12:40 -04:00

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