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<div class="subTitle">org.apache.hadoop.hbase.regionserver</div>
<h2 title="Class MemStoreFlusher" class="title">Class MemStoreFlusher</h2>
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<ul class="inheritance">
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<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushRequester.html" title="interface in org.apache.hadoop.hbase.regionserver">FlushRequester</a></dd>
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<pre>@InterfaceAudience.Private
public class <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#line.70">MemStoreFlusher</a>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
implements <a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushRequester.html" title="interface in org.apache.hadoop.hbase.regionserver">FlushRequester</a></pre>
<div class="block">Thread that flushes cache on request
NOTE: This class extends Thread rather than Chore because the sleep time
can be interrupted when there is something to do, rather than the Chore
sleep time which is invariant.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushRequester.html" title="interface in org.apache.hadoop.hbase.regionserver"><code>FlushRequester</code></a></dd>
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<caption><span>Nested Classes</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Class and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.FlushHandler.html" title="class in org.apache.hadoop.hbase.regionserver">MemStoreFlusher.FlushHandler</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>(package private) static interface&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.FlushQueueEntry.html" title="interface in org.apache.hadoop.hbase.regionserver">MemStoreFlusher.FlushQueueEntry</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>(package private) static class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.FlushRegionEntry.html" title="class in org.apache.hadoop.hbase.regionserver">MemStoreFlusher.FlushRegionEntry</a></span></code>
<div class="block">Datastructure used in the flush queue.</div>
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<caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#blockingWaitTime">blockingWaitTime</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#blockSignal">blockSignal</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private org.apache.hadoop.conf.Configuration</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#conf">conf</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.FlushHandler.html" title="class in org.apache.hadoop.hbase.regionserver">MemStoreFlusher.FlushHandler</a>[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#flushHandlers">flushHandlers</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/BlockingQueue.html?is-external=true" title="class or interface in java.util.concurrent">BlockingQueue</a>&lt;<a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.FlushQueueEntry.html" title="interface in org.apache.hadoop.hbase.regionserver">MemStoreFlusher.FlushQueueEntry</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#flushQueue">flushQueue</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushRequestListener.html" title="interface in org.apache.hadoop.hbase.regionserver">FlushRequestListener</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#flushRequestListeners">flushRequestListeners</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/locks/ReentrantReadWriteLock.html?is-external=true" title="class or interface in java.util.concurrent.locks">ReentrantReadWriteLock</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#lock">lock</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private static org.slf4j.Logger</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#LOG">LOG</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="../../../../../org/apache/hadoop/hbase/regionserver/Region.html" title="interface in org.apache.hadoop.hbase.regionserver">Region</a>,<a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.FlushRegionEntry.html" title="class in org.apache.hadoop.hbase.regionserver">MemStoreFlusher.FlushRegionEntry</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#regionsInQueue">regionsInQueue</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/regionserver/HRegionServer.html" title="class in org.apache.hadoop.hbase.regionserver">HRegionServer</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#server">server</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>private long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#threadWakeFrequency">threadWakeFrequency</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/LongAdder.html?is-external=true" title="class or interface in java.util.concurrent.atomic">LongAdder</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#updatesBlockedMsHighWater">updatesBlockedMsHighWater</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>private static <a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.FlushQueueEntry.html" title="interface in org.apache.hadoop.hbase.regionserver">MemStoreFlusher.FlushQueueEntry</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#WAKEUPFLUSH_INSTANCE">WAKEUPFLUSH_INSTANCE</a></span></code>
<div class="block">Singleton instance inserted into flush queue used for signaling.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicBoolean.html?is-external=true" title="class or interface in java.util.concurrent.atomic">AtomicBoolean</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#wakeupPending">wakeupPending</a></span></code>&nbsp;</td>
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<tr>
<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#MemStoreFlusher-org.apache.hadoop.conf.Configuration-org.apache.hadoop.hbase.regionserver.HRegionServer-">MemStoreFlusher</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="../../../../../org/apache/hadoop/hbase/regionserver/HRegionServer.html" title="class in org.apache.hadoop.hbase.regionserver">HRegionServer</a>&nbsp;server)</code>&nbsp;</td>
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<h3>Method Summary</h3>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#dumpQueue--">dumpQueue</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>private boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#flushOneForGlobalPressure-org.apache.hadoop.hbase.regionserver.FlushType-">flushOneForGlobalPressure</a></span>(<a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushType.html" title="enum in org.apache.hadoop.hbase.regionserver">FlushType</a>&nbsp;flushType)</code>
<div class="block">The memstore across all regions has exceeded the low water mark.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>private boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#flushRegion-org.apache.hadoop.hbase.regionserver.HRegion-boolean-java.util.List-org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker-">flushRegion</a></span>(<a href="../../../../../org/apache/hadoop/hbase/regionserver/HRegion.html" title="class in org.apache.hadoop.hbase.regionserver">HRegion</a>&nbsp;region,
boolean&nbsp;emergencyFlush,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;byte[]&gt;&nbsp;families,
<a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushLifeCycleTracker.html" title="interface in org.apache.hadoop.hbase.regionserver">FlushLifeCycleTracker</a>&nbsp;tracker)</code>
<div class="block">Flush a region.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>private boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#flushRegion-org.apache.hadoop.hbase.regionserver.MemStoreFlusher.FlushRegionEntry-">flushRegion</a></span>(<a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.FlushRegionEntry.html" title="class in org.apache.hadoop.hbase.regionserver">MemStoreFlusher.FlushRegionEntry</a>&nbsp;fqe)</code>
<div class="block">A flushRegion that checks store file count.</div>
</td>
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<tr id="i4" class="altColor">
<td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/regionserver/HRegion.html" title="class in org.apache.hadoop.hbase.regionserver">HRegion</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#getBiggestMemStoreOfRegionReplica-java.util.SortedMap-java.util.Set-">getBiggestMemStoreOfRegionReplica</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/SortedMap.html?is-external=true" title="class or interface in java.util">SortedMap</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;<a href="../../../../../org/apache/hadoop/hbase/regionserver/HRegion.html" title="class in org.apache.hadoop.hbase.regionserver">HRegion</a>&gt;&gt;&nbsp;regionsBySize,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&lt;<a href="../../../../../org/apache/hadoop/hbase/regionserver/HRegion.html" title="class in org.apache.hadoop.hbase.regionserver">HRegion</a>&gt;&nbsp;excludedRegions)</code>&nbsp;</td>
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<tr id="i5" class="rowColor">
<td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/regionserver/HRegion.html" title="class in org.apache.hadoop.hbase.regionserver">HRegion</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#getBiggestMemStoreRegion-java.util.SortedMap-java.util.Set-boolean-">getBiggestMemStoreRegion</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/SortedMap.html?is-external=true" title="class or interface in java.util">SortedMap</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;<a href="../../../../../org/apache/hadoop/hbase/regionserver/HRegion.html" title="class in org.apache.hadoop.hbase.regionserver">HRegion</a>&gt;&gt;&nbsp;regionsBySize,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&lt;<a href="../../../../../org/apache/hadoop/hbase/regionserver/HRegion.html" title="class in org.apache.hadoop.hbase.regionserver">HRegion</a>&gt;&nbsp;excludedRegions,
boolean&nbsp;checkStoreFileCount)</code>&nbsp;</td>
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<tr id="i6" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#getFlushQueueSize--">getFlushQueueSize</a></span>()</code>&nbsp;</td>
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<tr id="i7" class="rowColor">
<td class="colFirst"><code>private static long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#getMemStoreDataSize-org.apache.hadoop.hbase.regionserver.HRegion-">getMemStoreDataSize</a></span>(<a href="../../../../../org/apache/hadoop/hbase/regionserver/HRegion.html" title="class in org.apache.hadoop.hbase.regionserver">HRegion</a>&nbsp;r)</code>&nbsp;</td>
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<tr id="i8" class="altColor">
<td class="colFirst"><code>private static long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#getMemStoreHeapSize-org.apache.hadoop.hbase.regionserver.HRegion-">getMemStoreHeapSize</a></span>(<a href="../../../../../org/apache/hadoop/hbase/regionserver/HRegion.html" title="class in org.apache.hadoop.hbase.regionserver">HRegion</a>&nbsp;r)</code>&nbsp;</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>private static long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#getMemStoreOffHeapSize-org.apache.hadoop.hbase.regionserver.HRegion-">getMemStoreOffHeapSize</a></span>(<a href="../../../../../org/apache/hadoop/hbase/regionserver/HRegion.html" title="class in org.apache.hadoop.hbase.regionserver">HRegion</a>&nbsp;r)</code>&nbsp;</td>
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<td class="colFirst"><code>private int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#getStoreFileCount-org.apache.hadoop.hbase.regionserver.Region-">getStoreFileCount</a></span>(<a href="../../../../../org/apache/hadoop/hbase/regionserver/Region.html" title="interface in org.apache.hadoop.hbase.regionserver">Region</a>&nbsp;region)</code>&nbsp;</td>
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<td class="colFirst"><code>(package private) void</code></td>
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<td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushType.html" title="enum in org.apache.hadoop.hbase.regionserver">FlushType</a></code></td>
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<tr id="i14" class="altColor">
<td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushType.html" title="enum in org.apache.hadoop.hbase.regionserver">FlushType</a></code></td>
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<tr id="i15" class="rowColor">
<td class="colFirst"><code>(package private) boolean</code></td>
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<td class="colFirst"><code>(package private) void</code></td>
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<td class="colFirst"><code>private void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#logMsg-java.lang.String-long-long-">logMsg</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;type,
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<td class="colFirst"><code>private void</code></td>
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<td class="colFirst"><code>void</code></td>
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<td class="colFirst"><code>private boolean</code></td>
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<td class="colFirst"><code>void</code></td>
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<div class="block">Register a MemstoreFlushListener</div>
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<td class="colFirst"><code>boolean</code></td>
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<td class="colFirst"><code>boolean</code></td>
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<td class="colFirst"><code>boolean</code></td>
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<td class="colFirst"><code>void</code></td>
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<td class="colFirst"><code>(package private) void</code></td>
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<td class="colFirst"><code>boolean</code></td>
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<td class="colFirst"><code>private void</code></td>
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<td class="colFirst"><code>private void</code></td>
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<div class="block">Return true if global memory usage is above the high watermark</div>
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<div class="block">Return true if we're above the low watermark</div>
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<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushRequester.html#requestFlush-org.apache.hadoop.hbase.regionserver.HRegion-org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker-">FlushRequester</a></code></span></div>
<div class="block">Tell the listener the cache needs to be flushed.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushRequester.html#requestFlush-org.apache.hadoop.hbase.regionserver.HRegion-org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker-">requestFlush</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushRequester.html" title="interface in org.apache.hadoop.hbase.regionserver">FlushRequester</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>r</code> - the Region requesting the cache flush</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if our region is added into the queue, false otherwise</dd>
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<div class="block">Tell the listener the cache needs to be flushed.</div>
<dl>
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<dd><code><a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushRequester.html#requestFlush-org.apache.hadoop.hbase.regionserver.HRegion-java.util.List-org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker-">requestFlush</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushRequester.html" title="interface in org.apache.hadoop.hbase.regionserver">FlushRequester</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>r</code> - the Region requesting the cache flush</dd>
<dd><code>families</code> - stores of region to flush, if null then use flush policy</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if our region is added into the queue, false otherwise</dd>
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<dd><code><a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushRequester.html#requestDelayedFlush-org.apache.hadoop.hbase.regionserver.HRegion-long-">requestDelayedFlush</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushRequester.html" title="interface in org.apache.hadoop.hbase.regionserver">FlushRequester</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>r</code> - the Region requesting the cache flush</dd>
<dd><code>delay</code> - after how much time should the flush happen</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if our region is added into the queue, false otherwise</dd>
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<div class="block">Only interrupt once it's done with a run through the work loop.</div>
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<div class="block">A flushRegion that checks store file count. If too many, puts the flush
on delay queue to retry later.</div>
<dl>
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<dd><code>fqe</code> - </dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if the region was successfully flushed, false otherwise. If
false, there will be accompanying log messages explaining why the region was
not flushed.</dd>
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<div class="block">Flush a region.</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>region</code> - Region to flush.</dd>
<dd><code>emergencyFlush</code> - Set if we are being force flushed. If true the region
needs to be removed from the flush queue. If false, when we were called
from the main flusher run loop and we got the entry to flush by calling
poll on the flush queue (which removed it).</dd>
<dd><code>families</code> - stores of region to flush.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if the region was successfully flushed, false otherwise. If
false, there will be accompanying log messages explaining why the region was
not flushed.</dd>
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<pre>public&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#line.720">reclaimMemStoreMemory</a>()</pre>
<div class="block">Check if the regionserver's memstore memory usage is greater than the
limit. If so, flush regions with the biggest memstores until we're down
to the lower limit. This method blocks callers until we're down to a safe
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<div class="block">Register a MemstoreFlushListener</div>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushRequester.html#registerFlushRequestListener-org.apache.hadoop.hbase.regionserver.FlushRequestListener-">registerFlushRequestListener</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushRequester.html" title="interface in org.apache.hadoop.hbase.regionserver">FlushRequester</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>listener</code> - </dd>
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<div class="block">Unregister the listener from MemstoreFlushListeners</div>
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<dd><code><a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushRequester.html#unregisterFlushRequestListener-org.apache.hadoop.hbase.regionserver.FlushRequestListener-">unregisterFlushRequestListener</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushRequester.html" title="interface in org.apache.hadoop.hbase.regionserver">FlushRequester</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>listener</code> - </dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true when passed listener is unregistered successfully.</dd>
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<pre>public&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.html#line.850">setGlobalMemStoreLimit</a>(long&nbsp;globalMemStoreSize)</pre>
<div class="block">Sets the global memstore limit to a new size.</div>
<dl>
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<dd><code><a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushRequester.html#setGlobalMemStoreLimit-long-">setGlobalMemStoreLimit</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/regionserver/FlushRequester.html" title="interface in org.apache.hadoop.hbase.regionserver">FlushRequester</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>globalMemStoreSize</code> - </dd>
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