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| <div class="subTitle">org.apache.ignite.configuration</div> |
| <h2 title="Class MemoryPolicyConfiguration" class="title">Class MemoryPolicyConfiguration</h2> |
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| <li>org.apache.ignite.configuration.MemoryPolicyConfiguration</li> |
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| <pre>public final class <span class="strong">MemoryPolicyConfiguration</span> |
| extends <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> |
| implements <a href="http://docs.oracle.com/javase/7/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a></pre> |
| <div class="block">This class allows defining custom memory policies' configurations with various parameters for Apache Ignite |
| page memory (see <a href="../../../../org/apache/ignite/configuration/MemoryConfiguration.html" title="class in org.apache.ignite.configuration"><code>MemoryConfiguration</code></a>. For each configured memory policy Apache Ignite instantiates |
| respective memory regions with different parameters like maximum size, eviction policy, swapping options, etc. |
| An Apache Ignite cache can be mapped to a particular policy using |
| <a href="../../../../org/apache/ignite/configuration/CacheConfiguration.html#setMemoryPolicyName(java.lang.String)"><code>CacheConfiguration.setMemoryPolicyName(String)</code></a> method. |
| <p>Sample configuration below shows how to configure several memory policies:</p> |
| <pre> |
| <code><property name="memoryConfiguration"> |
| <bean class="org.apache.ignite.configuration.MemoryConfiguration"> |
| <property name="defaultMemoryPolicyName" value="Default_Region"/> |
| <property name="pageSize" value="4096"/> |
| |
| <property name="memoryPolicies"> |
| <list> |
| <bean class="org.apache.ignite.configuration.MemoryPolicyConfiguration"> |
| <property name="name" value="Default_Region"/> |
| <property name="initialSize" value="#{100 * 1024 * 1024}"/> |
| </bean> |
| |
| <bean class="org.apache.ignite.configuration.MemoryPolicyConfiguration"> |
| <property name="name" value="20MB_Region_Eviction"/> |
| <property name="initialSize" value="#{20 * 1024 * 1024}"/> |
| <property name="pageEvictionMode" value="RANDOM_2_LRU"/> |
| </bean> |
| |
| <bean class="org.apache.ignite.configuration.MemoryPolicyConfiguration"> |
| <property name="name" value="25MB_Region_Swapping"/> |
| <property name="initialSize" value="#{25 * 1024 * 1024}"/> |
| <property name="initialSize" value="#{100 * 1024 * 1024}"/> |
| <property name="swapFilePath" value="memoryPolicyExampleSwap"/> |
| </bean> |
| </list> |
| </property> |
| </code> |
| </pre></div> |
| <dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../serialized-form.html#org.apache.ignite.configuration.MemoryPolicyConfiguration">Serialized Form</a></dd></dl> |
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| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#DFLT_METRICS_ENABLED">DFLT_METRICS_ENABLED</a></strong></code> |
| <div class="block">Default metrics enabled flag.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#DFLT_RATE_TIME_INTERVAL_MILLIS">DFLT_RATE_TIME_INTERVAL_MILLIS</a></strong></code> |
| <div class="block">Default length of interval over which <a href="../../../../org/apache/ignite/MemoryMetrics.html#getAllocationRate()"><code>MemoryMetrics.getAllocationRate()</code></a> metric is calculated.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#DFLT_SUB_INTERVALS">DFLT_SUB_INTERVALS</a></strong></code> |
| <div class="block">Default amount of sub intervals to calculate <a href="../../../../org/apache/ignite/MemoryMetrics.html#getAllocationRate()"><code>MemoryMetrics.getAllocationRate()</code></a> metric.</div> |
| </td> |
| </tr> |
| </table> |
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| <th class="colOne" scope="col">Constructor and Description</th> |
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| <td class="colOne"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#MemoryPolicyConfiguration()">MemoryPolicyConfiguration</a></strong>()</code> </td> |
| </tr> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#getEmptyPagesPoolSize()">getEmptyPagesPoolSize</a></strong>()</code> |
| <div class="block">Specifies the minimal number of empty pages to be present in reuse lists for this memory policy.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#getEvictionThreshold()">getEvictionThreshold</a></strong>()</code> |
| <div class="block">Gets a threshold for memory pages eviction initiation.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#getInitialSize()">getInitialSize</a></strong>()</code> |
| <div class="block">Gets initial memory region size defined by this memory policy.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#getMaxSize()">getMaxSize</a></strong>()</code> |
| <div class="block">Maximum memory region size defined by this memory policy.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#getName()">getName</a></strong>()</code> |
| <div class="block">Gets memory policy name.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/ignite/configuration/DataPageEvictionMode.html" title="enum in org.apache.ignite.configuration">DataPageEvictionMode</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#getPageEvictionMode()">getPageEvictionMode</a></strong>()</code> |
| <div class="block">Gets memory pages eviction mode.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#getRateTimeInterval()">getRateTimeInterval</a></strong>()</code> |
| <div class="block">Gets time interval for <a href="../../../../org/apache/ignite/MemoryMetrics.html#getAllocationRate()"><code>MemoryMetrics.getAllocationRate()</code></a> |
| and <a href="../../../../org/apache/ignite/MemoryMetrics.html#getEvictionRate()"><code>MemoryMetrics.getEvictionRate()</code></a> monitoring purposes.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#getSubIntervals()">getSubIntervals</a></strong>()</code> |
| <div class="block">Gets a number of sub-intervals the whole <a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#setRateTimeInterval(long)"><code>setRateTimeInterval(long)</code></a> |
| will be split into to calculate <a href="../../../../org/apache/ignite/MemoryMetrics.html#getAllocationRate()"><code>MemoryMetrics.getAllocationRate()</code></a> |
| and <a href="../../../../org/apache/ignite/MemoryMetrics.html#getEvictionRate()"><code>MemoryMetrics.getEvictionRate()</code></a> rates (5 by default).</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#getSwapFilePath()">getSwapFilePath</a></strong>()</code> |
| <div class="block">A path to the memory-mapped files the memory region defined by this memory policy will be mapped to.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#isMetricsEnabled()">isMetricsEnabled</a></strong>()</code> |
| <div class="block">Gets whether memory metrics are enabled by default on node startup.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#setEmptyPagesPoolSize(int)">setEmptyPagesPoolSize</a></strong>(int emptyPagesPoolSize)</code> |
| <div class="block">Specifies the minimal number of empty pages to be present in reuse lists for this memory policy.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#setEvictionThreshold(double)">setEvictionThreshold</a></strong>(double evictionThreshold)</code> |
| <div class="block">Sets memory pages eviction threshold.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#setInitialSize(long)">setInitialSize</a></strong>(long initialSize)</code> |
| <div class="block">Sets initial memory region size defined by this memory policy.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#setMaxSize(long)">setMaxSize</a></strong>(long maxSize)</code> |
| <div class="block">Sets maximum memory region size defined by this memory policy.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#setMetricsEnabled(boolean)">setMetricsEnabled</a></strong>(boolean metricsEnabled)</code> |
| <div class="block">Sets memory metrics enabled flag.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#setName(java.lang.String)">setName</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name)</code> |
| <div class="block">Sets memory policy name.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#setPageEvictionMode(org.apache.ignite.configuration.DataPageEvictionMode)">setPageEvictionMode</a></strong>(<a href="../../../../org/apache/ignite/configuration/DataPageEvictionMode.html" title="enum in org.apache.ignite.configuration">DataPageEvictionMode</a> evictionMode)</code> |
| <div class="block">Sets memory pages eviction mode.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#setRateTimeInterval(long)">setRateTimeInterval</a></strong>(long rateTimeInterval)</code> |
| <div class="block">Sets time interval for <a href="../../../../org/apache/ignite/MemoryMetrics.html#getAllocationRate()"><code>MemoryMetrics.getAllocationRate()</code></a> |
| and <a href="../../../../org/apache/ignite/MemoryMetrics.html#getEvictionRate()"><code>MemoryMetrics.getEvictionRate()</code></a> monitoring purposes.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#setSubIntervals(int)">setSubIntervals</a></strong>(int subIntervals)</code> |
| <div class="block">Sets a number of sub-intervals the whole <a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#setRateTimeInterval(long)"><code>setRateTimeInterval(long)</code></a> will be split into to calculate |
| <a href="../../../../org/apache/ignite/MemoryMetrics.html#getAllocationRate()"><code>MemoryMetrics.getAllocationRate()</code></a> and <a href="../../../../org/apache/ignite/MemoryMetrics.html#getEvictionRate()"><code>MemoryMetrics.getEvictionRate()</code></a> rates (5 by default).</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#setSwapFilePath(java.lang.String)">setSwapFilePath</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> swapFilePath)</code> |
| <div class="block">Sets a path to the memory-mapped file.</div> |
| </td> |
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| <code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait(long,%20int)" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
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| <h4>DFLT_METRICS_ENABLED</h4> |
| <pre>public static final boolean DFLT_METRICS_ENABLED</pre> |
| <div class="block">Default metrics enabled flag.</div> |
| <dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../constant-values.html#org.apache.ignite.configuration.MemoryPolicyConfiguration.DFLT_METRICS_ENABLED">Constant Field Values</a></dd></dl> |
| </li> |
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| <a name="DFLT_SUB_INTERVALS"> |
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| <h4>DFLT_SUB_INTERVALS</h4> |
| <pre>public static final int DFLT_SUB_INTERVALS</pre> |
| <div class="block">Default amount of sub intervals to calculate <a href="../../../../org/apache/ignite/MemoryMetrics.html#getAllocationRate()"><code>MemoryMetrics.getAllocationRate()</code></a> metric.</div> |
| <dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../constant-values.html#org.apache.ignite.configuration.MemoryPolicyConfiguration.DFLT_SUB_INTERVALS">Constant Field Values</a></dd></dl> |
| </li> |
| </ul> |
| <a name="DFLT_RATE_TIME_INTERVAL_MILLIS"> |
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| <h4>DFLT_RATE_TIME_INTERVAL_MILLIS</h4> |
| <pre>public static final int DFLT_RATE_TIME_INTERVAL_MILLIS</pre> |
| <div class="block">Default length of interval over which <a href="../../../../org/apache/ignite/MemoryMetrics.html#getAllocationRate()"><code>MemoryMetrics.getAllocationRate()</code></a> metric is calculated.</div> |
| <dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../constant-values.html#org.apache.ignite.configuration.MemoryPolicyConfiguration.DFLT_RATE_TIME_INTERVAL_MILLIS">Constant Field Values</a></dd></dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor_detail"> |
| <!-- --> |
| </a> |
| <h3>Constructor Detail</h3> |
| <a name="MemoryPolicyConfiguration()"> |
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| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>MemoryPolicyConfiguration</h4> |
| <pre>public MemoryPolicyConfiguration()</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method_detail"> |
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| </a> |
| <h3>Method Detail</h3> |
| <a name="getName()"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getName</h4> |
| <pre>public <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> getName()</pre> |
| <div class="block">Gets memory policy name.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>Memory policy name.</dd></dl> |
| </li> |
| </ul> |
| <a name="setName(java.lang.String)"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setName</h4> |
| <pre>public <a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a> setName(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name)</pre> |
| <div class="block">Sets memory policy name. The name must be non empty and must not be equal to the reserved 'sysMemPlc' one. |
| |
| If not specified, <a href="../../../../org/apache/ignite/configuration/MemoryConfiguration.html#DFLT_MEM_PLC_DEFAULT_NAME"><code>MemoryConfiguration.DFLT_MEM_PLC_DEFAULT_NAME</code></a> value is used.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>name</code> - Memory policy name.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd><code>this</code> for chaining.</dd></dl> |
| </li> |
| </ul> |
| <a name="getMaxSize()"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getMaxSize</h4> |
| <pre>public long getMaxSize()</pre> |
| <div class="block">Maximum memory region size defined by this memory policy. If the whole data can not fit into the memory region |
| an out of memory exception will be thrown.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>Size in bytes.</dd></dl> |
| </li> |
| </ul> |
| <a name="setMaxSize(long)"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setMaxSize</h4> |
| <pre>public <a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a> setMaxSize(long maxSize)</pre> |
| <div class="block">Sets maximum memory region size defined by this memory policy. The total size should not be less than 10 MB |
| due to the internal data structures overhead.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>maxSize</code> - Maximum memory policy size in bytes.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd><code>this</code> for chaining.</dd></dl> |
| </li> |
| </ul> |
| <a name="getInitialSize()"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getInitialSize</h4> |
| <pre>public long getInitialSize()</pre> |
| <div class="block">Gets initial memory region size defined by this memory policy. When the used memory size exceeds this value, |
| new chunks of memory will be allocated.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>Memory policy start size.</dd></dl> |
| </li> |
| </ul> |
| <a name="setInitialSize(long)"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setInitialSize</h4> |
| <pre>public <a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a> setInitialSize(long initialSize)</pre> |
| <div class="block">Sets initial memory region size defined by this memory policy. When the used memory size exceeds this value, |
| new chunks of memory will be allocated.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>initialSize</code> - Memory policy initial size.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd><code>this</code> for chaining.</dd></dl> |
| </li> |
| </ul> |
| <a name="getSwapFilePath()"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getSwapFilePath</h4> |
| <pre>public <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> getSwapFilePath()</pre> |
| <div class="block">A path to the memory-mapped files the memory region defined by this memory policy will be mapped to. Having |
| the path set, allows relying on swapping capabilities of an underlying operating system for the memory region.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>A path to the memory-mapped files or <code>null</code> if this feature is not used for the memory region |
| defined by this memory policy.</dd></dl> |
| </li> |
| </ul> |
| <a name="setSwapFilePath(java.lang.String)"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setSwapFilePath</h4> |
| <pre>public <a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a> setSwapFilePath(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> swapFilePath)</pre> |
| <div class="block">Sets a path to the memory-mapped file.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>swapFilePath</code> - A Path to the memory mapped file.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd><code>this</code> for chaining.</dd></dl> |
| </li> |
| </ul> |
| <a name="getPageEvictionMode()"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getPageEvictionMode</h4> |
| <pre>public <a href="../../../../org/apache/ignite/configuration/DataPageEvictionMode.html" title="enum in org.apache.ignite.configuration">DataPageEvictionMode</a> getPageEvictionMode()</pre> |
| <div class="block">Gets memory pages eviction mode. If <a href="../../../../org/apache/ignite/configuration/DataPageEvictionMode.html#DISABLED"><code>DataPageEvictionMode.DISABLED</code></a> is used (default) then an out of |
| memory exception will be thrown if the memory region usage, defined by this memory policy, goes beyond its |
| capacity which is <a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#getMaxSize()"><code>getMaxSize()</code></a>.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>Memory pages eviction algorithm. <a href="../../../../org/apache/ignite/configuration/DataPageEvictionMode.html#DISABLED"><code>DataPageEvictionMode.DISABLED</code></a> used by default.</dd></dl> |
| </li> |
| </ul> |
| <a name="setPageEvictionMode(org.apache.ignite.configuration.DataPageEvictionMode)"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setPageEvictionMode</h4> |
| <pre>public <a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a> setPageEvictionMode(<a href="../../../../org/apache/ignite/configuration/DataPageEvictionMode.html" title="enum in org.apache.ignite.configuration">DataPageEvictionMode</a> evictionMode)</pre> |
| <div class="block">Sets memory pages eviction mode.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>evictionMode</code> - Eviction mode.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd><code>this</code> for chaining.</dd></dl> |
| </li> |
| </ul> |
| <a name="getEvictionThreshold()"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getEvictionThreshold</h4> |
| <pre>public double getEvictionThreshold()</pre> |
| <div class="block">Gets a threshold for memory pages eviction initiation. For instance, if the threshold is 0.9 it means that the |
| page memory will start the eviction only after 90% of the memory region (defined by this policy) is occupied.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>Memory pages eviction threshold.</dd></dl> |
| </li> |
| </ul> |
| <a name="setEvictionThreshold(double)"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setEvictionThreshold</h4> |
| <pre>public <a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a> setEvictionThreshold(double evictionThreshold)</pre> |
| <div class="block">Sets memory pages eviction threshold.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>evictionThreshold</code> - Eviction threshold.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd><code>this</code> for chaining.</dd></dl> |
| </li> |
| </ul> |
| <a name="getEmptyPagesPoolSize()"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getEmptyPagesPoolSize</h4> |
| <pre>public int getEmptyPagesPoolSize()</pre> |
| <div class="block">Specifies the minimal number of empty pages to be present in reuse lists for this memory policy. |
| This parameter ensures that Ignite will be able to successfully evict old data entries when the size of |
| (key, value) pair is slightly larger than page size / 2. |
| Increase this parameter if cache can contain very big entries (total size of pages in this pool should be enough |
| to contain largest cache entry). |
| Increase this parameter if <code>IgniteOutOfMemoryException</code> occurred with enabled page eviction.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>Minimum number of empty pages in reuse list.</dd></dl> |
| </li> |
| </ul> |
| <a name="setEmptyPagesPoolSize(int)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setEmptyPagesPoolSize</h4> |
| <pre>public <a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a> setEmptyPagesPoolSize(int emptyPagesPoolSize)</pre> |
| <div class="block">Specifies the minimal number of empty pages to be present in reuse lists for this memory policy. |
| This parameter ensures that Ignite will be able to successfully evict old data entries when the size of |
| (key, value) pair is slightly larger than page size / 2. |
| Increase this parameter if cache can contain very big entries (total size of pages in this pool should be enough |
| to contain largest cache entry). |
| Increase this parameter if <code>IgniteOutOfMemoryException</code> occurred with enabled page eviction.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>emptyPagesPoolSize</code> - Empty pages pool size.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd><code>this</code> for chaining.</dd></dl> |
| </li> |
| </ul> |
| <a name="isMetricsEnabled()"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isMetricsEnabled</h4> |
| <pre>public boolean isMetricsEnabled()</pre> |
| <div class="block">Gets whether memory metrics are enabled by default on node startup. Memory metrics can be enabled and disabled |
| at runtime via memory metrics <a href="../../../../org/apache/ignite/mxbean/MemoryMetricsMXBean.html" title="interface in org.apache.ignite.mxbean"><code>MX bean</code></a>.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>Metrics enabled flag.</dd></dl> |
| </li> |
| </ul> |
| <a name="setMetricsEnabled(boolean)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setMetricsEnabled</h4> |
| <pre>public <a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a> setMetricsEnabled(boolean metricsEnabled)</pre> |
| <div class="block">Sets memory metrics enabled flag. If this flag is <code>true</code>, metrics will be enabled on node startup. |
| Memory metrics can be enabled and disabled at runtime via memory metrics <a href="../../../../org/apache/ignite/mxbean/MemoryMetricsMXBean.html" title="interface in org.apache.ignite.mxbean"><code>MX bean</code></a>.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>metricsEnabled</code> - Metrics enabled flag.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd><code>this</code> for chaining.</dd></dl> |
| </li> |
| </ul> |
| <a name="getRateTimeInterval()"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getRateTimeInterval</h4> |
| <pre>public long getRateTimeInterval()</pre> |
| <div class="block">Gets time interval for <a href="../../../../org/apache/ignite/MemoryMetrics.html#getAllocationRate()"><code>MemoryMetrics.getAllocationRate()</code></a> |
| and <a href="../../../../org/apache/ignite/MemoryMetrics.html#getEvictionRate()"><code>MemoryMetrics.getEvictionRate()</code></a> monitoring purposes. |
| <p> |
| For instance, after setting the interval to 60_000 milliseconds, |
| subsequent calls to <a href="../../../../org/apache/ignite/MemoryMetrics.html#getAllocationRate()"><code>MemoryMetrics.getAllocationRate()</code></a> |
| will return average allocation rate (pages per second) for the last minute.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>Time interval over which allocation rate is calculated.</dd></dl> |
| </li> |
| </ul> |
| <a name="setRateTimeInterval(long)"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setRateTimeInterval</h4> |
| <pre>public <a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a> setRateTimeInterval(long rateTimeInterval)</pre> |
| <div class="block">Sets time interval for <a href="../../../../org/apache/ignite/MemoryMetrics.html#getAllocationRate()"><code>MemoryMetrics.getAllocationRate()</code></a> |
| and <a href="../../../../org/apache/ignite/MemoryMetrics.html#getEvictionRate()"><code>MemoryMetrics.getEvictionRate()</code></a> monitoring purposes. |
| <p> |
| For instance, after setting the interval to 60 seconds, |
| subsequent calls to <a href="../../../../org/apache/ignite/MemoryMetrics.html#getAllocationRate()"><code>MemoryMetrics.getAllocationRate()</code></a> |
| will return average allocation rate (pages per second) for the last minute.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>rateTimeInterval</code> - Time interval used for allocation and eviction rates calculations.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd><code>this</code> for chaining.</dd></dl> |
| </li> |
| </ul> |
| <a name="getSubIntervals()"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getSubIntervals</h4> |
| <pre>public int getSubIntervals()</pre> |
| <div class="block">Gets a number of sub-intervals the whole <a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#setRateTimeInterval(long)"><code>setRateTimeInterval(long)</code></a> |
| will be split into to calculate <a href="../../../../org/apache/ignite/MemoryMetrics.html#getAllocationRate()"><code>MemoryMetrics.getAllocationRate()</code></a> |
| and <a href="../../../../org/apache/ignite/MemoryMetrics.html#getEvictionRate()"><code>MemoryMetrics.getEvictionRate()</code></a> rates (5 by default). |
| <p> |
| Setting it to a bigger value will result in more precise calculation and smaller drops of |
| <a href="../../../../org/apache/ignite/MemoryMetrics.html#getAllocationRate()"><code>MemoryMetrics.getAllocationRate()</code></a> metric when next sub-interval has to be recycled but introduces bigger |
| calculation overhead.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>number of sub intervals.</dd></dl> |
| </li> |
| </ul> |
| <a name="setSubIntervals(int)"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>setSubIntervals</h4> |
| <pre>public <a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html" title="class in org.apache.ignite.configuration">MemoryPolicyConfiguration</a> setSubIntervals(int subIntervals)</pre> |
| <div class="block">Sets a number of sub-intervals the whole <a href="../../../../org/apache/ignite/configuration/MemoryPolicyConfiguration.html#setRateTimeInterval(long)"><code>setRateTimeInterval(long)</code></a> will be split into to calculate |
| <a href="../../../../org/apache/ignite/MemoryMetrics.html#getAllocationRate()"><code>MemoryMetrics.getAllocationRate()</code></a> and <a href="../../../../org/apache/ignite/MemoryMetrics.html#getEvictionRate()"><code>MemoryMetrics.getEvictionRate()</code></a> rates (5 by default). |
| <p> |
| Setting it to a bigger value will result in more precise calculation and smaller drops of |
| <a href="../../../../org/apache/ignite/MemoryMetrics.html#getAllocationRate()"><code>MemoryMetrics.getAllocationRate()</code></a> metric when next sub-interval has to be recycled but introduces bigger |
| calculation overhead.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>subIntervals</code> - A number of sub-intervals.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd><code>this</code> for chaining.</dd></dl> |
| </li> |
| </ul> |
| </li> |
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| <div class="aboutLanguage"><em>Ignite - In-Memory Data Fabric</em></div> |
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| <p class="legalCopy"><small><table width="100%" border="0" cellspacing=0 cellpadding=0 style="padding: 5px"> <tr> <td> <table style="padding-left: 0; margin: 0"> <tbody style="padding: 0; margin: 0"> <tr style="padding: 0; margin: 0"> <td> <a target=_blank href="https://ignite.apache.org"><nobr>2017 Copyright © Apache Software Foundation</nobr></a> </td> </tr> </tbody> </table> </td> <td width="100%" align="right" valign="center"> <a href="https://twitter.com/ApacheIgnite" class="twitter-follow-button" data-show-count="false" data-size="large">Follow @ApacheIgnite</a> </td> </tr> <tr> <td colspan="2" valign="top" align="left"> <table style="padding-left: 0; margin: 0"> <tbody style="padding: 0; margin: 0"> <tr style="padding: 0; margin: 0"> <td> <b>Ignite Fabric</b> </td> <td>: ver. <strong>2.1.0</strong> </td> </tr> <tr style="padding: 0; margin: 0"> <td> <b>Release Date</b> </td> <td>: July 20 2017 </td> </tr> </tbody> </table> </td> </tr> </table></small></p> |
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