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Yasuhiro KIMURA
650 lines
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650 lines
22 KiB
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<div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">com.sleepycat.db</a></div>
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<h2 title="Class TransactionStats" class="title">Class TransactionStats</h2>
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<div class="contentContainer">
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<ul class="inheritance">
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<li>java.lang.Object</li>
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<ul class="inheritance">
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<li>com.sleepycat.db.TransactionStats</li>
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<pre>public class <span class="typeNameLabel">TransactionStats</span>
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extends java.lang.Object</pre>
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<div class="block">Transaction statistics for a database environment.</div>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colLast" scope="col">Description</th>
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<tr class="altColor">
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<td class="colFirst"><code>static class </code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="TransactionStats.Active.html" title="class in com.sleepycat.db">TransactionStats.Active</a></span></code></th>
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<td class="colLast"> </td>
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<h3>Method Summary</h3>
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<table class="memberSummary" 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></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="colSecond" scope="col">Method</th>
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<th class="colLast" scope="col">Description</th>
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</tr>
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<tr id="i0" class="altColor">
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<td class="colFirst"><code>int</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getInittxns--">getInittxns</a></span>()</code></th>
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<td class="colLast">
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<div class="block">The initial number of transactions configured.</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><a href="LogSequenceNumber.html" title="class in com.sleepycat.db">LogSequenceNumber</a></code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getLastCkp--">getLastCkp</a></span>()</code></th>
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<td class="colLast">
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<div class="block">The LSN of the last checkpoint.</div>
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</td>
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<tr id="i2" class="altColor">
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<td class="colFirst"><code>int</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getLastTxnId--">getLastTxnId</a></span>()</code></th>
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<td class="colLast">
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<div class="block">The last transaction ID allocated.</div>
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</td>
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<tr id="i3" class="rowColor">
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<td class="colFirst"><code>int</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getMaxNactive--">getMaxNactive</a></span>()</code></th>
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<td class="colLast">
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<div class="block">The maximum number of active transactions at any one time.</div>
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</td>
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<tr id="i4" class="altColor">
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<td class="colFirst"><code>int</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getMaxNsnapshot--">getMaxNsnapshot</a></span>()</code></th>
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<td class="colLast">
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<div class="block">The maximum number of transactions on the snapshot list at any one time.</div>
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</td>
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<tr id="i5" class="rowColor">
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<td class="colFirst"><code>int</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getMaxTxns--">getMaxTxns</a></span>()</code></th>
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<td class="colLast">
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<div class="block">The maximum number of active transactions configured.</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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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getNaborts--">getNaborts</a></span>()</code></th>
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<td class="colLast">
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<div class="block">The number of transactions that have aborted.</div>
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</td>
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<tr id="i7" class="rowColor">
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<td class="colFirst"><code>int</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getNactive--">getNactive</a></span>()</code></th>
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<td class="colLast">
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<div class="block">The number of transactions that are currently active.</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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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getNumBegins--">getNumBegins</a></span>()</code></th>
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<td class="colLast">
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<div class="block">The number of transactions that have begun.</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>long</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getNumCommits--">getNumCommits</a></span>()</code></th>
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<td class="colLast">
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<div class="block">The number of transactions that have committed.</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>int</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getNumRestores--">getNumRestores</a></span>()</code></th>
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<td class="colLast">
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<div class="block">The number of transactions that have been restored.</div>
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</td>
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<tr id="i11" class="rowColor">
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<td class="colFirst"><code>int</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getNumSnapshot--">getNumSnapshot</a></span>()</code></th>
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<td class="colLast">
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<div class="block">The number of transactions on the snapshot list.</div>
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</td>
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<tr id="i12" class="altColor">
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<td class="colFirst"><code>long</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getRegionNowait--">getRegionNowait</a></span>()</code></th>
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<td class="colLast">
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<div class="block">The number of times that a thread of control was able to obtain the
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transaction region mutex without waiting.</div>
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</td>
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<tr id="i13" class="rowColor">
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<td class="colFirst"><code>long</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getRegionWait--">getRegionWait</a></span>()</code></th>
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<td class="colLast">
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<div class="block">The number of times that a thread of control was forced to wait before
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obtaining the transaction region mutex.</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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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getRegSize--">getRegSize</a></span>()</code></th>
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<td class="colLast">
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<div class="block">The size of the region.</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>long</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getTimeCkp--">getTimeCkp</a></span>()</code></th>
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<td class="colLast">
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<div class="block">The time the last completed checkpoint finished (as the number of
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seconds since the Epoch, returned by the IEEE/ANSI Std 1003.1
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(POSIX) time interface).</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><a href="TransactionStats.Active.html" title="class in com.sleepycat.db">TransactionStats.Active</a>[]</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getTxnarray--">getTxnarray</a></span>()</code></th>
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<td class="colLast">
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<div class="block">An array of <code>Active</code> objects, describing the currently active transactions.</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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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#toString--">toString</a></span>()</code></th>
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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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<h4>getNumRestores</h4>
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<pre class="methodSignature">public int getNumRestores()</pre>
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<div class="block">The number of transactions that have been restored.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the number of transactions that have been restored</dd>
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</dl>
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<h4>getLastCkp</h4>
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<pre class="methodSignature">public <a href="LogSequenceNumber.html" title="class in com.sleepycat.db">LogSequenceNumber</a> getLastCkp()</pre>
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<div class="block">The LSN of the last checkpoint.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the LSN of the last checkpoint</dd>
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</dl>
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<h4>getTimeCkp</h4>
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<pre class="methodSignature">public long getTimeCkp()</pre>
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<div class="block">The time the last completed checkpoint finished (as the number of
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seconds since the Epoch, returned by the IEEE/ANSI Std 1003.1
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(POSIX) time interface).</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the time the last completed checkpoint finished</dd>
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</dl>
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</li>
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<a name="getLastTxnId--">
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<h4>getLastTxnId</h4>
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<pre class="methodSignature">public int getLastTxnId()</pre>
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<div class="block">The last transaction ID allocated.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the last transaction ID allocated</dd>
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</dl>
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<h4>getInittxns</h4>
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<pre class="methodSignature">public int getInittxns()</pre>
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<div class="block">The initial number of transactions configured.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the initial number of transactions configured</dd>
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</dl>
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<h4>getMaxTxns</h4>
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<pre class="methodSignature">public int getMaxTxns()</pre>
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<div class="block">The maximum number of active transactions configured.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the maximum number of active transactions configured</dd>
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</dl>
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<h4>getNaborts</h4>
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<pre class="methodSignature">public long getNaborts()</pre>
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<div class="block">The number of transactions that have aborted.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the number of transactions that have aborted</dd>
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<h4>getNumBegins</h4>
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<pre class="methodSignature">public long getNumBegins()</pre>
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<div class="block">The number of transactions that have begun.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the number of transactions that have begun</dd>
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<h4>getNumCommits</h4>
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<pre class="methodSignature">public long getNumCommits()</pre>
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<div class="block">The number of transactions that have committed.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the number of transactions that have committed</dd>
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<h4>getNactive</h4>
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<pre class="methodSignature">public int getNactive()</pre>
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<div class="block">The number of transactions that are currently active.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the number of transactions that are currently active</dd>
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<pre class="methodSignature">public int getNumSnapshot()</pre>
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<div class="block">The number of transactions on the snapshot list. These are transactions
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which modified a database opened with <a href="DatabaseConfig.html#setMultiversion-boolean-"><code>DatabaseConfig.setMultiversion(boolean)</code></a>, and which have committed or aborted, but
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the copies of pages they created are still in the cache.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the number of transactions on the snapshot list</dd>
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<h4>getMaxNactive</h4>
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<pre class="methodSignature">public int getMaxNactive()</pre>
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<div class="block">The maximum number of active transactions at any one time.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the maximum number of active transactions at any one time</dd>
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<h4>getMaxNsnapshot</h4>
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<pre class="methodSignature">public int getMaxNsnapshot()</pre>
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<div class="block">The maximum number of transactions on the snapshot list at any one time.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the maximum number of transactions on the snapshot list at any one time</dd>
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<pre class="methodSignature">public long getRegionWait()</pre>
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<div class="block">The number of times that a thread of control was forced to wait before
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obtaining the transaction region mutex.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the number of times that a thread of control was forced to wait before
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obtaining the transaction region mutex</dd>
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<h4>getRegionNowait</h4>
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<pre class="methodSignature">public long getRegionNowait()</pre>
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<div class="block">The number of times that a thread of control was able to obtain the
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transaction region mutex without waiting.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the number of times that a thread of control was able to obtain the
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transaction region mutex without waiting</dd>
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<h4>getRegSize</h4>
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<pre class="methodSignature">public long getRegSize()</pre>
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<div class="block">The size of the region.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the size of the region</dd>
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</dl>
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</ul>
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<a name="getTxnarray--">
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<h4>getTxnarray</h4>
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<pre class="methodSignature">public <a href="TransactionStats.Active.html" title="class in com.sleepycat.db">TransactionStats.Active</a>[] getTxnarray()</pre>
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<div class="block">An array of <code>Active</code> objects, describing the currently active transactions.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>an array of Active transactions</dd>
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</dl>
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<h4>toString</h4>
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<pre class="methodSignature">public java.lang.String toString()</pre>
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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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