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| <h2 title="Class MemorySizeUtil" class="title">Class MemorySizeUtil</h2> |
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| <ul class="inheritance"> |
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| <ul class="inheritance"> |
| <li>org.apache.hadoop.hbase.io.util.MemorySizeUtil</li> |
| </ul> |
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| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#line.36">MemorySizeUtil</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></pre> |
| <div class="block">Util class to calculate memory size for memstore, block cache(L1, L2) of RS.</div> |
| </li> |
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| <caption><span>Fields</span><span class="tabEnd"> </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 static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#CONVERT_TO_PERCENTAGE">CONVERT_TO_PERCENTAGE</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static float</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#DEFAULT_MEMSTORE_SIZE">DEFAULT_MEMSTORE_SIZE</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static float</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#DEFAULT_MEMSTORE_SIZE_LOWER_LIMIT">DEFAULT_MEMSTORE_SIZE_LOWER_LIMIT</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static <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/io/util/MemorySizeUtil.html#JVM_HEAP_EXCEPTION">JVM_HEAP_EXCEPTION</a></span></code> </td> |
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| <tr class="altColor"> |
| <td class="colFirst"><code>private static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#LOG">LOG</a></span></code> </td> |
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| <tr class="rowColor"> |
| <td class="colFirst"><code>static <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/io/util/MemorySizeUtil.html#MEMSTORE_SIZE_KEY">MEMSTORE_SIZE_KEY</a></span></code> </td> |
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| <td class="colFirst"><code>static <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> |
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| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <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/io/util/MemorySizeUtil.html#MEMSTORE_SIZE_LOWER_LIMIT_OLD_KEY">MEMSTORE_SIZE_LOWER_LIMIT_OLD_KEY</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <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/io/util/MemorySizeUtil.html#MEMSTORE_SIZE_OLD_KEY">MEMSTORE_SIZE_OLD_KEY</a></span></code> </td> |
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| <tr class="rowColor"> |
| <td class="colFirst"><code>static <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/io/util/MemorySizeUtil.html#OFFHEAP_MEMSTORE_SIZE_KEY">OFFHEAP_MEMSTORE_SIZE_KEY</a></span></code> </td> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#MemorySizeUtil--">MemorySizeUtil</a></span>()</code> </td> |
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| <tr> |
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| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#checkForClusterFreeHeapMemoryLimit-org.apache.hadoop.conf.Configuration-">checkForClusterFreeHeapMemoryLimit</a></span>(org.apache.hadoop.conf.Configuration conf)</code> |
| <div class="block">Checks whether we have enough heap memory left out after portion for Memstore and Block cache.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static float</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#getBlockCacheHeapPercent-org.apache.hadoop.conf.Configuration-">getBlockCacheHeapPercent</a></span>(org.apache.hadoop.conf.Configuration conf)</code> |
| <div class="block">Retrieve configured size for on heap block cache as percentage of total heap.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#getBucketCacheSize-org.apache.hadoop.conf.Configuration-">getBucketCacheSize</a></span>(org.apache.hadoop.conf.Configuration conf)</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>static float</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#getGlobalMemStoreHeapLowerMark-org.apache.hadoop.conf.Configuration-boolean-">getGlobalMemStoreHeapLowerMark</a></span>(org.apache.hadoop.conf.Configuration conf, |
| boolean honorOldConfig)</code> |
| <div class="block">Retrieve configured size for global memstore lower water mark as fraction of global memstore |
| size.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>static float</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#getGlobalMemStoreHeapPercent-org.apache.hadoop.conf.Configuration-boolean-">getGlobalMemStoreHeapPercent</a></span>(org.apache.hadoop.conf.Configuration c, |
| boolean logInvalid)</code> |
| <div class="block">Retrieve global memstore configured size as percentage of total heap.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>static <a href="../../../../../../org/apache/hadoop/hbase/util/Pair.html" title="class in org.apache.hadoop.hbase.util">Pair</a><<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/lang/management/MemoryType.html?is-external=true" title="class or interface in java.lang.management">MemoryType</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#getGlobalMemStoreSize-org.apache.hadoop.conf.Configuration-">getGlobalMemStoreSize</a></span>(org.apache.hadoop.conf.Configuration conf)</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>static long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#getOnHeapCacheSize-org.apache.hadoop.conf.Configuration-">getOnHeapCacheSize</a></span>(org.apache.hadoop.conf.Configuration conf)</code> </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>static long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#getOnheapGlobalMemStoreSize-org.apache.hadoop.conf.Configuration-">getOnheapGlobalMemStoreSize</a></span>(org.apache.hadoop.conf.Configuration conf)</code> |
| <div class="block">Returns the onheap global memstore limit based on the config |
| 'hbase.regionserver.global.memstore.size'.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/management/MemoryUsage.html?is-external=true" title="class or interface in java.lang.management">MemoryUsage</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#safeGetHeapMemoryUsage--">safeGetHeapMemoryUsage</a></span>()</code> |
| <div class="block">Return JVM memory statistics while properly handling runtime exceptions from the JVM.</div> |
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| <h4>DEFAULT_MEMSTORE_SIZE_LOWER_LIMIT</h4> |
| <pre>public static final float <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#line.52">DEFAULT_MEMSTORE_SIZE_LOWER_LIMIT</a></pre> |
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| <pre>private static final org.slf4j.Logger <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#line.54">LOG</a></pre> |
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| <pre>private static final int <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#line.56">CONVERT_TO_PERCENTAGE</a></pre> |
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| <h4>JVM_HEAP_EXCEPTION</h4> |
| <pre>private static final <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> <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#line.58">JVM_HEAP_EXCEPTION</a></pre> |
| <dl> |
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| <dd><a href="../../../../../../constant-values.html#org.apache.hadoop.hbase.io.util.MemorySizeUtil.JVM_HEAP_EXCEPTION">Constant Field Values</a></dd> |
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| <h3>Constructor Detail</h3> |
| <a name="MemorySizeUtil--"> |
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| <h4>MemorySizeUtil</h4> |
| <pre>public <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#line.36">MemorySizeUtil</a>()</pre> |
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| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/management/MemoryUsage.html?is-external=true" title="class or interface in java.lang.management">MemoryUsage</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#line.69">safeGetHeapMemoryUsage</a>()</pre> |
| <div class="block">Return JVM memory statistics while properly handling runtime exceptions from the JVM.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a memory usage object, null if there was a runtime exception. (n.b. you |
| could also get -1 values back from the JVM)</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/management/MemoryUsage.html?is-external=true" title="class or interface in java.lang.management"><code>MemoryUsage</code></a></dd> |
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| <a name="checkForClusterFreeHeapMemoryLimit-org.apache.hadoop.conf.Configuration-"> |
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| <h4>checkForClusterFreeHeapMemoryLimit</h4> |
| <pre>public static void <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#line.84">checkForClusterFreeHeapMemoryLimit</a>(org.apache.hadoop.conf.Configuration conf)</pre> |
| <div class="block">Checks whether we have enough heap memory left out after portion for Memstore and Block cache. |
| We need atleast 20% of heap left out for other RS functions.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>conf</code> - </dd> |
| </dl> |
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| </ul> |
| <a name="getGlobalMemStoreHeapPercent-org.apache.hadoop.conf.Configuration-boolean-"> |
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| <h4>getGlobalMemStoreHeapPercent</h4> |
| <pre>public static float <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#line.110">getGlobalMemStoreHeapPercent</a>(org.apache.hadoop.conf.Configuration c, |
| boolean logInvalid)</pre> |
| <div class="block">Retrieve global memstore configured size as percentage of total heap.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>c</code> - </dd> |
| <dd><code>logInvalid</code> - </dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getGlobalMemStoreHeapLowerMark-org.apache.hadoop.conf.Configuration-boolean-"> |
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| <pre>public static float <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#line.128">getGlobalMemStoreHeapLowerMark</a>(org.apache.hadoop.conf.Configuration conf, |
| boolean honorOldConfig)</pre> |
| <div class="block">Retrieve configured size for global memstore lower water mark as fraction of global memstore |
| size.</div> |
| </li> |
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| <h4>getGlobalMemStoreSize</h4> |
| <pre>public static <a href="../../../../../../org/apache/hadoop/hbase/util/Pair.html" title="class in org.apache.hadoop.hbase.util">Pair</a><<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/lang/management/MemoryType.html?is-external=true" title="class or interface in java.lang.management">MemoryType</a>> <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#line.162">getGlobalMemStoreSize</a>(org.apache.hadoop.conf.Configuration conf)</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Pair of global memstore size and memory type(ie. on heap or off heap).</dd> |
| </dl> |
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| <a name="getOnheapGlobalMemStoreSize-org.apache.hadoop.conf.Configuration-"> |
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| <h4>getOnheapGlobalMemStoreSize</h4> |
| <pre>public static long <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#line.190">getOnheapGlobalMemStoreSize</a>(org.apache.hadoop.conf.Configuration conf)</pre> |
| <div class="block">Returns the onheap global memstore limit based on the config |
| 'hbase.regionserver.global.memstore.size'.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>conf</code> - </dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the onheap global memstore limt</dd> |
| </dl> |
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| <h4>getBlockCacheHeapPercent</h4> |
| <pre>public static float <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#line.204">getBlockCacheHeapPercent</a>(org.apache.hadoop.conf.Configuration conf)</pre> |
| <div class="block">Retrieve configured size for on heap block cache as percentage of total heap.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>conf</code> - </dd> |
| </dl> |
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| <h4>getOnHeapCacheSize</h4> |
| <pre>public static long <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#line.216">getOnHeapCacheSize</a>(org.apache.hadoop.conf.Configuration conf)</pre> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>conf</code> - used to read cache configs</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the number of bytes to use for LRU, negative if disabled.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if HFILE_BLOCK_CACHE_SIZE_KEY is > 1.0</dd> |
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| <a name="getBucketCacheSize-org.apache.hadoop.conf.Configuration-"> |
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| <h4>getBucketCacheSize</h4> |
| <pre>public static long <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/util/MemorySizeUtil.html#line.240">getBucketCacheSize</a>(org.apache.hadoop.conf.Configuration conf)</pre> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>conf</code> - used to read config for bucket cache size.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the number of bytes to use for bucket cache, negative if disabled.</dd> |
| </dl> |
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