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<div class="subTitle">org.apache.ignite</div>
<h2 title="Interface DataStorageMetrics" class="title">Interface DataStorageMetrics</h2>
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<dt>All Known Subinterfaces:</dt>
<dd><a href="../../../org/apache/ignite/mxbean/DataStorageMetricsMXBean.html" title="interface in org.apache.ignite.mxbean">DataStorageMetricsMXBean</a></dd>
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<pre>public interface <span class="typeNameLabel">DataStorageMetrics</span></pre>
<div class="block">Data storage metrics are used to obtain statistics on persistent store and whole data storage.</div>
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<h3>Method Summary</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
<caption><span id="t0" class="activeTableTab"><span>All Methods</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="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract 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>
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<tr id="i0" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getCheckpointTotalTime--">getCheckpointTotalTime</a></span>()</code>
<div class="block">Total checkpoint time from last restart.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getDirtyPages--">getDirtyPages</a></span>()</code>
<div class="block">Total dirty pages for the next checkpoint.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getLastCheckpointCopiedOnWritePagesNumber--">getLastCheckpointCopiedOnWritePagesNumber</a></span>()</code>
<div class="block">Gets the number of pages copied to a temporary checkpoint buffer during the last checkpoint.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getLastCheckpointDataPagesNumber--">getLastCheckpointDataPagesNumber</a></span>()</code>
<div class="block">Gets the number of data pages written during the last checkpoint.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getLastCheckpointDuration--">getLastCheckpointDuration</a></span>()</code>
<div class="block">Gets the duration of the last checkpoint in milliseconds.</div>
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<tr id="i5" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getLastCheckpointFsyncDuration--">getLastCheckpointFsyncDuration</a></span>()</code>
<div class="block">Gets the duration of the sync phase of the last checkpoint in milliseconds.</div>
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<tr id="i6" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getLastCheckpointLockWaitDuration--">getLastCheckpointLockWaitDuration</a></span>()</code>
<div class="block">Gets the duration of last checkpoint lock wait in milliseconds.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getLastCheckpointMarkDuration--">getLastCheckpointMarkDuration</a></span>()</code>
<div class="block">Gets the duration of last checkpoint mark phase in milliseconds.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getLastCheckpointPagesWriteDuration--">getLastCheckpointPagesWriteDuration</a></span>()</code>
<div class="block">Gets the duration of last checkpoint pages write phase in milliseconds.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getLastCheckpointTotalPagesNumber--">getLastCheckpointTotalPagesNumber</a></span>()</code>
<div class="block">Gets the total number of pages written during the last checkpoint.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getOffHeapSize--">getOffHeapSize</a></span>()</code>
<div class="block">Total offheap size in bytes.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getOffheapUsedSize--">getOffheapUsedSize</a></span>()</code>
<div class="block">Total used offheap size in bytes.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getPagesRead--">getPagesRead</a></span>()</code>
<div class="block">The number of read pages from last restart.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getPagesReplaced--">getPagesReplaced</a></span>()</code>
<div class="block">The number of replaced pages from last restart.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getPagesWritten--">getPagesWritten</a></span>()</code>
<div class="block">The number of written pages from last restart.</div>
</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getTotalAllocatedSize--">getTotalAllocatedSize</a></span>()</code>
<div class="block">Total size of memory allocated in bytes.</div>
</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getWalArchiveSegments--">getWalArchiveSegments</a></span>()</code>
<div class="block">Gets the current number of WAL segments in the WAL archive.</div>
</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getWalBuffPollSpinsRate--">getWalBuffPollSpinsRate</a></span>()</code>
<div class="block">Returns WAL buffer poll spins number over the last time interval.</div>
</td>
</tr>
<tr id="i18" class="altColor">
<td class="colFirst"><code>float</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getWalFsyncTimeAverage--">getWalFsyncTimeAverage</a></span>()</code>
<div class="block">Gets the average WAL fsync duration in microseconds over the last time interval.</div>
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<tr id="i19" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getWalLastRollOverTime--">getWalLastRollOverTime</a></span>()</code>
<div class="block">Time of the last WAL segment rollover.</div>
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</tr>
<tr id="i20" class="altColor">
<td class="colFirst"><code>float</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getWalLoggingRate--">getWalLoggingRate</a></span>()</code>
<div class="block">Gets the average number of WAL records per second written during the last time interval.</div>
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<tr id="i21" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getWalTotalSize--">getWalTotalSize</a></span>()</code>
<div class="block">Total size in bytes for storage wal files.</div>
</td>
</tr>
<tr id="i22" class="altColor">
<td class="colFirst"><code>float</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/DataStorageMetrics.html#getWalWritingRate--">getWalWritingRate</a></span>()</code>
<div class="block">Gets the average number of bytes per second written during the last time interval.</div>
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<h4>getWalLoggingRate</h4>
<pre>float&nbsp;getWalLoggingRate()</pre>
<div class="block">Gets the average number of WAL records per second written during the last time interval.
<p>
The length of time interval is configured via <a href="../../../org/apache/ignite/configuration/DataStorageConfiguration.html#setMetricsRateTimeInterval-long-"><code>DataStorageConfiguration.setMetricsRateTimeInterval(long)</code></a>
configuration property.
The number of subintervals is configured via <a href="../../../org/apache/ignite/configuration/DataStorageConfiguration.html#setMetricsSubIntervalCount-int-"><code>DataStorageConfiguration.setMetricsSubIntervalCount(int)</code></a>
configuration property.</div>
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<pre>float&nbsp;getWalWritingRate()</pre>
<div class="block">Gets the average number of bytes per second written during the last time interval.
The length of time interval is configured via <a href="../../../org/apache/ignite/configuration/DataStorageConfiguration.html#setMetricsRateTimeInterval-long-"><code>DataStorageConfiguration.setMetricsRateTimeInterval(long)</code></a>
configuration property.
The number of subintervals is configured via <a href="../../../org/apache/ignite/configuration/DataStorageConfiguration.html#setMetricsSubIntervalCount-int-"><code>DataStorageConfiguration.setMetricsSubIntervalCount(int)</code></a>
configuration property.</div>
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<h4>getWalArchiveSegments</h4>
<pre>int&nbsp;getWalArchiveSegments()</pre>
<div class="block">Gets the current number of WAL segments in the WAL archive.</div>
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<pre>float&nbsp;getWalFsyncTimeAverage()</pre>
<div class="block">Gets the average WAL fsync duration in microseconds over the last time interval.
<p>
The length of time interval is configured via <a href="../../../org/apache/ignite/configuration/DataStorageConfiguration.html#setMetricsRateTimeInterval-long-"><code>DataStorageConfiguration.setMetricsRateTimeInterval(long)</code></a>
configuration property.
The number of subintervals is configured via <a href="../../../org/apache/ignite/configuration/DataStorageConfiguration.html#setMetricsSubIntervalCount-int-"><code>DataStorageConfiguration.setMetricsSubIntervalCount(int)</code></a>
configuration property.</div>
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<h4>getWalBuffPollSpinsRate</h4>
<pre>long&nbsp;getWalBuffPollSpinsRate()</pre>
<div class="block">Returns WAL buffer poll spins number over the last time interval.
<p>
The length of time interval is configured via <a href="../../../org/apache/ignite/configuration/DataStorageConfiguration.html#setMetricsRateTimeInterval-long-"><code>DataStorageConfiguration.setMetricsRateTimeInterval(long)</code></a>
configuration property.
The number of subintervals is configured via <a href="../../../org/apache/ignite/configuration/DataStorageConfiguration.html#setMetricsSubIntervalCount-int-"><code>DataStorageConfiguration.setMetricsSubIntervalCount(int)</code></a>
configuration property.</div>
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<h4>getWalTotalSize</h4>
<pre>long&nbsp;getWalTotalSize()</pre>
<div class="block">Total size in bytes for storage wal files.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Total size in bytes for storage wal files.</dd>
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<pre>long&nbsp;getWalLastRollOverTime()</pre>
<div class="block">Time of the last WAL segment rollover.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>Time of the last WAL segment rollover.</dd>
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<pre>long&nbsp;getCheckpointTotalTime()</pre>
<div class="block">Total checkpoint time from last restart.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>Total checkpoint time from last restart.</dd>
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<pre>long&nbsp;getLastCheckpointDuration()</pre>
<div class="block">Gets the duration of the last checkpoint in milliseconds.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>Total checkpoint duration in milliseconds.</dd>
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<pre>long&nbsp;getLastCheckpointLockWaitDuration()</pre>
<div class="block">Gets the duration of last checkpoint lock wait in milliseconds.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Checkpoint lock wait time in milliseconds.</dd>
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<pre>long&nbsp;getLastCheckpointMarkDuration()</pre>
<div class="block">Gets the duration of last checkpoint mark phase in milliseconds.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Checkpoint mark duration in milliseconds.</dd>
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<pre>long&nbsp;getLastCheckpointPagesWriteDuration()</pre>
<div class="block">Gets the duration of last checkpoint pages write phase in milliseconds.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Checkpoint pages write phase in milliseconds.</dd>
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<pre>long&nbsp;getLastCheckpointFsyncDuration()</pre>
<div class="block">Gets the duration of the sync phase of the last checkpoint in milliseconds.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Checkpoint fsync time in milliseconds.</dd>
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<pre>long&nbsp;getLastCheckpointTotalPagesNumber()</pre>
<div class="block">Gets the total number of pages written during the last checkpoint.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Total number of pages written during the last checkpoint.</dd>
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<pre>long&nbsp;getLastCheckpointDataPagesNumber()</pre>
<div class="block">Gets the number of data pages written during the last checkpoint.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>Total number of data pages written during the last checkpoint.</dd>
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<pre>long&nbsp;getLastCheckpointCopiedOnWritePagesNumber()</pre>
<div class="block">Gets the number of pages copied to a temporary checkpoint buffer during the last checkpoint.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Total number of pages copied to a temporary checkpoint buffer during the last checkpoint.</dd>
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<pre>long&nbsp;getDirtyPages()</pre>
<div class="block">Total dirty pages for the next checkpoint.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>Total dirty pages for the next checkpoint.</dd>
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<pre>long&nbsp;getPagesRead()</pre>
<div class="block">The number of read pages from last restart.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>The number of read pages from last restart.</dd>
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<pre>long&nbsp;getPagesWritten()</pre>
<div class="block">The number of written pages from last restart.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>The number of written pages from last restart.</dd>
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<h4>getPagesReplaced</h4>
<pre>long&nbsp;getPagesReplaced()</pre>
<div class="block">The number of replaced pages from last restart.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>The number of replaced pages from last restart.</dd>
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<h4>getOffHeapSize</h4>
<pre>long&nbsp;getOffHeapSize()</pre>
<div class="block">Total offheap size in bytes.</div>
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<h4>getOffheapUsedSize</h4>
<pre>long&nbsp;getOffheapUsedSize()</pre>
<div class="block">Total used offheap size in bytes.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>Total used offheap size in bytes.</dd>
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<h4>getTotalAllocatedSize</h4>
<pre>long&nbsp;getTotalAllocatedSize()</pre>
<div class="block">Total size of memory allocated in bytes.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>Total size of memory allocated in bytes.</dd>
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