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<div class="subTitle">com.ibm.lang.management</div>
<h2 title="Class MemoryUsage" class="title">Class MemoryUsage</h2>
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<li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" target="_blank" title="class or interface in java.lang">java.lang.Object</a></li>
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<pre>public class <span class="typeNameLabel">MemoryUsage</span>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" target="_blank" title="class or interface in java.lang">Object</a></pre>
<div class="block">This represents a snapshot of the Operating System level Memory usage statistics.
This is available on AIX, Linux, Windows and z/OS.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.7.1</dd>
</dl>
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<th class="colOne" scope="col">Constructor and Description</th>
</tr>
<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../com/ibm/lang/management/MemoryUsage.html#MemoryUsage--">MemoryUsage</a></span>()</code>
<div class="block">Creates a new <a href="../../../../com/ibm/lang/management/MemoryUsage.html" title="class in com.ibm.lang.management"><code>MemoryUsage</code></a> instance.</div>
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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>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/lang/management/MemoryUsage.html#equals-java.lang.Object-">equals</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" target="_blank" title="class or interface in java.lang">Object</a>&nbsp;obj)</code>
<div class="block">Compares the argument to the receiver, and answers true
if they represent the <em>same</em> object using a class
specific comparison.</div>
</td>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>static <a href="../../../../com/ibm/lang/management/MemoryUsage.html" title="class in com.ibm.lang.management">MemoryUsage</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/lang/management/MemoryUsage.html#from-javax.management.openmbean.CompositeData-">from</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/javax/management/openmbean/CompositeData.html?is-external=true" target="_blank" title="class or interface in javax.management.openmbean">CompositeData</a>&nbsp;cd)</code>
<div class="block">Receives a <a href="https://docs.oracle.com/javase/8/docs/api/javax/management/openmbean/CompositeData.html?is-external=true" target="_blank" title="class or interface in javax.management.openmbean"><code>CompositeData</code></a> representing a <a href="../../../../com/ibm/lang/management/MemoryUsage.html" title="class in com.ibm.lang.management"><code>MemoryUsage</code></a></div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/lang/management/MemoryUsage.html#getBuffered--">getBuffered</a></span>()</code>
<div class="block">The amount of buffered memory in bytes.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/lang/management/MemoryUsage.html#getCached--">getCached</a></span>()</code>
<div class="block">The amount of cached memory in bytes.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/lang/management/MemoryUsage.html#getFree--">getFree</a></span>()</code>
<div class="block">The total amount of free physical memory in bytes.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/lang/management/MemoryUsage.html#getSwapFree--">getSwapFree</a></span>()</code>
<div class="block">The amount of free swap space in bytes.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/lang/management/MemoryUsage.html#getSwapTotal--">getSwapTotal</a></span>()</code>
<div class="block">The amount of total swap space in bytes.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/lang/management/MemoryUsage.html#getTimestamp--">getTimestamp</a></span>()</code>
<div class="block">The timestamp when the usage statistics were last sampled in microseconds.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/lang/management/MemoryUsage.html#getTotal--">getTotal</a></span>()</code>
<div class="block">The total amount of usable physical memory in bytes.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/lang/management/MemoryUsage.html#hashCode--">hashCode</a></span>()</code>
<div class="block">Answers an integer hash code for the receiver.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" target="_blank" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/lang/management/MemoryUsage.html#toString--">toString</a></span>()</code>
<div class="block">Text description of this <a href="../../../../com/ibm/lang/management/MemoryUsage.html" title="class in com.ibm.lang.management"><code>MemoryUsage</code></a> object.</div>
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<h3>Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" target="_blank" title="class or interface in java.lang">Object</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<h4>MemoryUsage</h4>
<pre>public&nbsp;MemoryUsage()</pre>
<div class="block">Creates a new <a href="../../../../com/ibm/lang/management/MemoryUsage.html" title="class in com.ibm.lang.management"><code>MemoryUsage</code></a> instance.</div>
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<h4>getTotal</h4>
<pre>public&nbsp;long&nbsp;getTotal()</pre>
<div class="block">The total amount of usable physical memory in bytes.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Total physical memory in bytes or -1 if info not available.</dd>
</dl>
</li>
</ul>
<a name="getFree--">
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<h4>getFree</h4>
<pre>public&nbsp;long&nbsp;getFree()</pre>
<div class="block">The total amount of free physical memory in bytes.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Free physical memory in bytes or -1 if info not available.</dd>
</dl>
</li>
</ul>
<a name="getSwapTotal--">
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<h4>getSwapTotal</h4>
<pre>public&nbsp;long&nbsp;getSwapTotal()</pre>
<div class="block">The amount of total swap space in bytes.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Total swap space in bytes or -1 if info not available.</dd>
</dl>
</li>
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<h4>getSwapFree</h4>
<pre>public&nbsp;long&nbsp;getSwapFree()</pre>
<div class="block">The amount of free swap space in bytes.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Free swap space in bytes or -1 if info not available.</dd>
</dl>
</li>
</ul>
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<h4>getCached</h4>
<pre>public&nbsp;long&nbsp;getCached()</pre>
<div class="block">The amount of cached memory in bytes. Cached memory usually consists of
contents of files and block devices.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Cached memory in bytes or -1 if info not available.</dd>
</dl>
</li>
</ul>
<a name="getBuffered--">
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<h4>getBuffered</h4>
<pre>public&nbsp;long&nbsp;getBuffered()</pre>
<div class="block">The amount of buffered memory in bytes. Buffered memory usually consists of
file metadata.
<ul>
<li>Buffered memory is not available on AIX and Windows.
</ul></div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Buffered memory in bytes or -1 if info not available.</dd>
</dl>
</li>
</ul>
<a name="getTimestamp--">
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<h4>getTimestamp</h4>
<pre>public&nbsp;long&nbsp;getTimestamp()</pre>
<div class="block">The timestamp when the usage statistics were last sampled in microseconds.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Timestamp in microseconds.</dd>
</dl>
</li>
</ul>
<a name="from-javax.management.openmbean.CompositeData-">
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<h4>from</h4>
<pre>public static&nbsp;<a href="../../../../com/ibm/lang/management/MemoryUsage.html" title="class in com.ibm.lang.management">MemoryUsage</a>&nbsp;from(<a href="https://docs.oracle.com/javase/8/docs/api/javax/management/openmbean/CompositeData.html?is-external=true" target="_blank" title="class or interface in javax.management.openmbean">CompositeData</a>&nbsp;cd)</pre>
<div class="block">Receives a <a href="https://docs.oracle.com/javase/8/docs/api/javax/management/openmbean/CompositeData.html?is-external=true" target="_blank" title="class or interface in javax.management.openmbean"><code>CompositeData</code></a> representing a <a href="../../../../com/ibm/lang/management/MemoryUsage.html" title="class in com.ibm.lang.management"><code>MemoryUsage</code></a></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>cd</code> - A <a href="https://docs.oracle.com/javase/8/docs/api/javax/management/openmbean/CompositeData.html?is-external=true" target="_blank" title="class or interface in javax.management.openmbean"><code>CompositeData</code></a> that represents a <a href="../../../../com/ibm/lang/management/MemoryUsage.html" title="class in com.ibm.lang.management"><code>MemoryUsage</code></a></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>If <code>cd</code> is non- <code>null</code>, returns a new instance of
<a href="../../../../com/ibm/lang/management/MemoryUsage.html" title="class in com.ibm.lang.management"><code>MemoryUsage</code></a>, If <code>cd</code> is <code>null</code>,
returns <code>null</code>.</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" target="_blank" title="class or interface in java.lang">IllegalArgumentException</a></code> - if argument <code>cd</code> does not correspond
to a <a href="../../../../com/ibm/lang/management/MemoryUsage.html" title="class in com.ibm.lang.management"><code>MemoryUsage</code></a> with the following attributes:
<ul>
<li><code>total</code>(<code>java.lang.Long</code>)</li>
<li><code>free</code>(<code>java.lang.Long</code>)</li>
<li><code>swapTotal</code>(<code>java.lang.Long</code>)</li>
<li><code>swapFree</code>(<code>java.lang.Long</code>)</li>
<li><code>cached</code>(<code>java.lang.Long</code>)</li>
<li><code>buffered</code>(<code>java.lang.Long</code>)</li>
<li><code>timestamp</code>(<code>java.lang.Long</code>)</li>
</ul></dd>
</dl>
</li>
</ul>
<a name="toString--">
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<h4>toString</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" target="_blank" title="class or interface in java.lang">String</a>&nbsp;toString()</pre>
<div class="block">Text description of this <a href="../../../../com/ibm/lang/management/MemoryUsage.html" title="class in com.ibm.lang.management"><code>MemoryUsage</code></a> object.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" target="_blank" title="class or interface in java.lang">Object</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a text description of this <a href="../../../../com/ibm/lang/management/MemoryUsage.html" title="class in com.ibm.lang.management"><code>MemoryUsage</code></a> object.</dd>
</dl>
</li>
</ul>
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<h4>equals</h4>
<pre>public&nbsp;boolean&nbsp;equals(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" target="_blank" title="class or interface in java.lang">Object</a>&nbsp;obj)</pre>
<div class="block">Compares the argument to the receiver, and answers true
if they represent the <em>same</em> object using a class
specific comparison. The implementation in Object answers
true only if the argument is the exact same object as the
receiver (==).</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" target="_blank" title="class or interface in java.lang">Object</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>obj</code> - Object
the object to compare with this object.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>boolean
<code>true</code>
if the object is the same as this object
<code>false</code>
if it is different from this object.</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang"><code>Object.hashCode()</code></a></dd>
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</li>
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<h4>hashCode</h4>
<pre>public&nbsp;int&nbsp;hashCode()</pre>
<div class="block">Answers an integer hash code for the receiver. Any two
objects which answer <code>true</code> when passed to
<code>.equals</code> must answer the same value for this
method.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
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<dd>the receiver's hash.</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang"><code>Object.equals(java.lang.Object)</code></a></dd>
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