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<title>LockStats (Oracle - Berkeley DB Java Edition API)</title>
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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 LockStats" class="title">Class LockStats</h2>
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<li>com.sleepycat.je.LockStats</li>
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<dd>java.io.Serializable</dd>
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</dl>
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<hr>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span>
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<div class="block"><span class="deprecationComment">as of 4.0.10, replaced by <a href="../../../com/sleepycat/je/Environment.html#getStats-com.sleepycat.je.StatsConfig-"><code>Environment.getStats(StatsConfig)</code></a>.</p></span></div>
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</div>
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<br>
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<pre>public class <span class="typeNameLabel">LockStats</span>
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extends java.lang.Object
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implements java.io.Serializable</pre>
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<div class="block">Lock statistics for a database environment.
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<p> Note that some of the lock statistics may be expensive to obtain because
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the lock table is unavailable to other operations while the statistics are
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gathered. These expensive statistics are only provided if <a href="../../../com/sleepycat/je/Environment.html#getLockStats-com.sleepycat.je.StatsConfig-"><code>Environment.getLockStats</code></a> is
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called with a StatsConfig parameter that has been configured for "slow"
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stats.</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.LockStats">Serialized Form</a></dd>
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</dl>
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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>int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/LockStats.html#getNAcquiresNoWaiters--">getNAcquiresNoWaiters</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
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<div class="block">Number of acquires of lock table latch with no contention.</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>int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/LockStats.html#getNAcquiresNoWaitSuccessful--">getNAcquiresNoWaitSuccessful</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
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<div class="block">Number of successful no-wait acquires of the lock table latch.</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>int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/LockStats.html#getNAcquiresNoWaitUnSuccessful--">getNAcquiresNoWaitUnSuccessful</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
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<div class="block">Number of unsuccessful no-wait acquires of the lock table latch.</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>int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/LockStats.html#getNAcquiresSelfOwned--">getNAcquiresSelfOwned</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
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<div class="block">Number of acquires of lock table latch when it was already owned
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by the caller.</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>int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/LockStats.html#getNAcquiresWithContention--">getNAcquiresWithContention</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
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<div class="block">Number of acquires of lock table latch when it was already owned by
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another thread.</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>int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/LockStats.html#getNOwners--">getNOwners</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
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<div class="block">Total lock owners in lock table.</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>int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/LockStats.html#getNReadLocks--">getNReadLocks</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
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<div class="block">Total read locks currently held.</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>int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/LockStats.html#getNReleases--">getNReleases</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
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<div class="block">Number of releases of the lock table latch.</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/LockStats.html#getNRequests--">getNRequests</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
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<div class="block">Total number of lock requests to date.</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/LockStats.html#getNTotalLocks--">getNTotalLocks</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
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<div class="block">Total locks currently in lock table.</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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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/LockStats.html#getNWaiters--">getNWaiters</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
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<div class="block">Total transactions waiting for locks.</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/LockStats.html#getNWaits--">getNWaits</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
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<div class="block">Total number of lock waits to date.</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>int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/LockStats.html#getNWriteLocks--">getNWriteLocks</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
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<div class="block">Total write locks currently held.</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>java.lang.String</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/LockStats.html#toString--">toString</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
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<div class="block">For convenience, LockTable.toString will display all stats in
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an easily readable format.</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>java.lang.String</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/LockStats.html#toStringVerbose--">toStringVerbose</a></span>()</code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
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<div class="block">Like #toString, display all stats.</div>
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</td>
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</tr>
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</table>
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<ul class="blockList">
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<li class="blockList"><a name="methods.inherited.from.class.java.lang.Object">
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<!-- -->
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</a>
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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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</li>
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</ul>
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</li>
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</ul>
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</div>
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<div class="details">
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<!-- ============ METHOD DETAIL ========== -->
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<li class="blockList"><a name="method.detail">
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</a>
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<h3>Method Detail</h3>
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<a name="getNOwners--">
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<h4>getNOwners</h4>
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<pre>public int getNOwners()</pre>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
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||
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<div class="block">Total lock owners in lock table. Only provided when <a href="../../../com/sleepycat/je/Environment.html#getLockStats-com.sleepycat.je.StatsConfig-"><code>Environment.getLockStats</code></a> is
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||
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called in "slow" mode.</div>
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</li>
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</ul>
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<pre>public int getNReadLocks()</pre>
|
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
|
||
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<div class="block">Total read locks currently held. Only provided when <a href="../../../com/sleepycat/je/Environment.html#getLockStats-com.sleepycat.je.StatsConfig-"><code>Environment.getLockStats</code></a> is
|
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<pre>public int getNTotalLocks()</pre>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
|
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<div class="block">Total locks currently in lock table. Only provided when <a href="../../../com/sleepycat/je/Environment.html#getLockStats-com.sleepycat.je.StatsConfig-"><code>Environment.getLockStats</code></a> is
|
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called in "slow" mode.</div>
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<pre>public int getNWaiters()</pre>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
|
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<div class="block">Total transactions waiting for locks. Only provided when <a href="../../../com/sleepycat/je/Environment.html#getLockStats-com.sleepycat.je.StatsConfig-"><code>Environment.getLockStats</code></a> is
|
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<pre>public int getNWriteLocks()</pre>
|
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
|
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<div class="block">Total write locks currently held. Only provided when <a href="../../../com/sleepycat/je/Environment.html#getLockStats-com.sleepycat.je.StatsConfig-"><code>Environment.getLockStats</code></a> is
|
||
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called in "slow" mode.</div>
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<pre>public long getNRequests()</pre>
|
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
|
||
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<div class="block">Total number of lock requests to date.</div>
|
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|
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|
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<pre>public long getNWaits()</pre>
|
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
|
||
|
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<div class="block">Total number of lock waits to date.</div>
|
||
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|
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<pre>public int getNAcquiresNoWaiters()</pre>
|
||
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
|
||
|
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<div class="block">Number of acquires of lock table latch with no contention.</div>
|
||
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|
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<pre>public int getNAcquiresSelfOwned()</pre>
|
||
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
|
||
|
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<div class="block">Number of acquires of lock table latch when it was already owned
|
||
|
|
by the caller.</div>
|
||
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|
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<pre>public int getNAcquiresWithContention()</pre>
|
||
|
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
|
||
|
|
<div class="block">Number of acquires of lock table latch when it was already owned by
|
||
|
|
another thread.</div>
|
||
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</li>
|
||
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</ul>
|
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<a name="getNAcquiresNoWaitSuccessful--">
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<h4>getNAcquiresNoWaitSuccessful</h4>
|
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<pre>public int getNAcquiresNoWaitSuccessful()</pre>
|
||
|
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
|
||
|
|
<div class="block">Number of successful no-wait acquires of the lock table latch.</div>
|
||
|
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|
||
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|
||
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<a name="getNAcquiresNoWaitUnSuccessful--">
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|
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<pre>public int getNAcquiresNoWaitUnSuccessful()</pre>
|
||
|
|
<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
|
||
|
|
<div class="block">Number of unsuccessful no-wait acquires of the lock table latch.</div>
|
||
|
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|
||
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|
||
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|
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|
||
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<pre>public int getNReleases()</pre>
|
||
|
|
<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
|
||
|
|
<div class="block">Number of releases of the lock table latch.</div>
|
||
|
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|
||
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|
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<a name="toString--">
|
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<h4>toString</h4>
|
||
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<pre>public java.lang.String toString()</pre>
|
||
|
|
<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
|
||
|
|
<div class="block">For convenience, LockTable.toString will display all stats in
|
||
|
|
an easily readable format.</div>
|
||
|
|
<dl>
|
||
|
|
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
|
||
|
|
<dd><code>toString</code> in class <code>java.lang.Object</code></dd>
|
||
|
|
</dl>
|
||
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</li>
|
||
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</ul>
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|
||
|
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<pre>public java.lang.String toStringVerbose()</pre>
|
||
|
|
<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
|
||
|
|
<div class="block">Like #toString, display all stats. Includes a description of each
|
||
|
|
stat.</div>
|
||
|
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</li>
|
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</ul>
|
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|
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|
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