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<a href="/docs/2.9.0/key-value-api/continuous-queries" class='' >Using Continuous Queries</a>
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<a href="/docs/2.9.0/services/services" class='' >Using Ignite Services</a>
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<article data-swiftype-index='true'>
<a class='edit-link' href="https://github.com/apache/ignite/tree/IGNITE-7595/docs/_docs/monitoring-metrics/new-metrics-system.adoc" target="_blank">Edit</a>
<h1>New Metrics System</h1>
<div class="sect1">
<h2 id="overview">Overview</h2>
<div class="sectionbody">
<div class="admonitionblock warning">
<table>
<tr>
<td class="icon">
<div class="title">Warning</div>
</td>
<td class="content">
Experimental
</td>
</tr>
</table>
</div>
<div class="paragraph">
<p>Ignite 2.8 introduced a new mechanism for collecting metrics, which is intended to replace the <a href="/docs/2.9.0/monitoring-metrics/metrics">legacy metrics system</a>.
This section explains the new system and how you can use it to monitor your cluster.</p>
</div>
<div class="paragraph">
<p>Let&#8217;s explore the basic concepts of the new metrics system in Ignite.
First, there are different metrics.
Each metric has a name and a return value.
The return value can be a simple value like <code>String</code>, <code>long</code>, or <code>double</code>, or can represent a Java object.
Some metrics represent <a href="#histograms">Histograms</a>.</p>
</div>
<div class="paragraph">
<p>And then there are different ways to export the metrics — what we call <em>exporters</em>.
To put it another way, the exporter are different ways you can access the metrics.
Each exporter always gives access to all available metrics.</p>
</div>
<div class="paragraph">
<p>Ignite includes the following exporters:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>JMX</p>
</li>
<li>
<p>SQL Views</p>
</li>
<li>
<p>Log files</p>
</li>
<li>
<p>OpenCensus</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>You can create a custom exporter by implementing the <a href="https://ignite.apache.org/releases/2.9.0/javadoc/org/apache/ignite/spi/metric/MetricExporterSpi.html" target="_blank" rel="noopener">MetricExporterSpi</a> interface.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="metric-registers">Metric Registers</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Metrics are grouped into categories (called <em>registers</em>).
Each register has a name.
The full name of a specific metric within the register consists of the register name followed by a dot, followed by the name of the metric: <code>&lt;register_name&gt;.&lt;metric_name&gt;</code>.
For example, the register for data storage metrics is called <code>io.datastorage</code>.
The metric that return the storage size is called <code>io.datastorage.StorageSize</code>.</p>
</div>
<div class="paragraph">
<p>The list of all registers and the metrics they contain are described <a href="/docs/2.9.0/monitoring-metrics/new-metrics">here</a>.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="metric-exporters">Metric Exporters</h2>
<div class="sectionbody">
<div class="paragraph">
<p>If you want to enable metrics, configure one or multiple metric exporters in the node configuration.
This is a node-specific configuration, which means it enables metrics only on the node where it is specified.</p>
</div>
<code-tabs><code-tab data-tab='XML'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="xml"><span class="nt">&lt;bean</span> <span class="na">class=</span><span class="s">"org.apache.ignite.configuration.IgniteConfiguration"</span><span class="nt">&gt;</span>
<span class="nt">&lt;property</span> <span class="na">name=</span><span class="s">"metricExporterSpi"</span><span class="nt">&gt;</span>
<span class="nt">&lt;list&gt;</span>
<span class="nt">&lt;bean</span> <span class="na">class=</span><span class="s">"org.apache.ignite.spi.metric.jmx.JmxMetricExporterSpi"</span><span class="nt">/&gt;</span>
<span class="nt">&lt;bean</span> <span class="na">class=</span><span class="s">"org.apache.ignite.spi.metric.sql.SqlViewMetricExporterSpi"</span><span class="nt">/&gt;</span>
<span class="nt">&lt;bean</span> <span class="na">class=</span><span class="s">"org.apache.ignite.spi.metric.log.LogExporterSpi"</span><span class="nt">/&gt;</span>
<span class="nt">&lt;bean</span> <span class="na">class=</span><span class="s">"org.apache.ignite.spi.metric.opencensus.OpenCensusMetricExporterSpi"</span><span class="nt">/&gt;</span>
<span class="nt">&lt;/list&gt;</span>
<span class="nt">&lt;/property&gt;</span>
<span class="nt">&lt;/bean&gt;</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='Java'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="java"><span class="nc">IgniteConfiguration</span> <span class="n">cfg</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">IgniteConfiguration</span><span class="o">();</span>
<span class="n">cfg</span><span class="o">.</span><span class="na">setMetricExporterSpi</span><span class="o">(</span><span class="k">new</span> <span class="nc">JmxMetricExporterSpi</span><span class="o">(),</span> <span class="k">new</span> <span class="nc">SqlViewMetricExporterSpi</span><span class="o">());</span>
<span class="nc">Ignite</span> <span class="n">ignite</span> <span class="o">=</span> <span class="nc">Ignition</span><span class="o">.</span><span class="na">start</span><span class="o">(</span><span class="n">cfg</span><span class="o">);</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='C#/.NET'></code-tab><code-tab data-tab='C++' data-unavailable='true'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code>This API is not presently available for C++. You can use XML configuration.</code></pre>
</div>
</div></code-tab></code-tabs>
<div class="paragraph">
<p>The following sections describe the exporters available in Ignite by default.</p>
</div>
<div class="sect2">
<h3 id="jmx">JMX</h3>
<div class="paragraph">
<p><code>org.apache.ignite.spi.metric.jmx.JmxMetricExporterSpi</code> exposes metrics via JMX beans.</p>
</div>
<code-tabs><code-tab data-tab='Java'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="java"><span class="nc">IgniteConfiguration</span> <span class="n">cfg</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">IgniteConfiguration</span><span class="o">();</span>
<span class="nc">JmxMetricExporterSpi</span> <span class="n">jmxExporter</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">JmxMetricExporterSpi</span><span class="o">();</span>
<span class="c1">//export cache metrics only</span>
<span class="n">jmxExporter</span><span class="o">.</span><span class="na">setExportFilter</span><span class="o">(</span><span class="n">mreg</span> <span class="o">-&gt;</span> <span class="n">mreg</span><span class="o">.</span><span class="na">name</span><span class="o">().</span><span class="na">startsWith</span><span class="o">(</span><span class="s">"cache."</span><span class="o">));</span>
<span class="n">cfg</span><span class="o">.</span><span class="na">setMetricExporterSpi</span><span class="o">(</span><span class="n">jmxExporter</span><span class="o">);</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='C#/.NET'></code-tab><code-tab data-tab='C++' data-unavailable='true'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code>This API is not presently available for C++.</code></pre>
</div>
</div></code-tab></code-tabs>
</div>
<div class="sect2">
<h3 id="sql-view">SQL View</h3>
<div class="paragraph">
<p><code>org.apache.ignite.spi.metric.sql.SqlViewMetricExporterSpi</code> exposes metrics via the <code>SYS.METRICS</code> view.
Each metric is displayed as a single record.
You can use any supported SQL tool to view the metrics:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="shell">> select name, value from SYS.METRICS where name LIKE 'cache.myCache.%';
+-----------------------------------+--------------------------------+
| NAME | VALUE |
+-----------------------------------+--------------------------------+
| cache.myCache.CacheTxRollbacks | 0 |
| cache.myCache.OffHeapRemovals | 0 |
| cache.myCache.QueryCompleted | 0 |
| cache.myCache.QueryFailed | 0 |
| cache.myCache.EstimatedRebalancingKeys | 0 |
| cache.myCache.CacheEvictions | 0 |
| cache.myCache.CommitTime | [J@2eb66498 |
....</code></pre>
</div>
</div>
<div class="paragraph">
<p>This is how you can configure the SQL View exporter:</p>
</div>
<code-tabs><code-tab data-tab='XML'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="xml"><span class="nt">&lt;bean</span> <span class="na">class=</span><span class="s">"org.apache.ignite.configuration.IgniteConfiguration"</span><span class="nt">&gt;</span>
<span class="nt">&lt;property</span> <span class="na">name=</span><span class="s">"metricExporterSpi"</span><span class="nt">&gt;</span>
<span class="nt">&lt;list&gt;</span>
<span class="nt">&lt;bean</span> <span class="na">class=</span><span class="s">"org.apache.ignite.spi.metric.sql.SqlViewMetricExporterSpi"</span><span class="nt">/&gt;</span>
<span class="nt">&lt;/list&gt;</span>
<span class="nt">&lt;/property&gt;</span>
<span class="nt">&lt;/bean&gt;</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='Java'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="java"><span class="nc">IgniteConfiguration</span> <span class="n">cfg</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">IgniteConfiguration</span><span class="o">();</span>
<span class="nc">SqlViewMetricExporterSpi</span> <span class="n">jmxExporter</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">SqlViewMetricExporterSpi</span><span class="o">();</span>
<span class="c1">//export cache metrics only</span>
<span class="n">jmxExporter</span><span class="o">.</span><span class="na">setExportFilter</span><span class="o">(</span><span class="n">mreg</span> <span class="o">-&gt;</span> <span class="n">mreg</span><span class="o">.</span><span class="na">name</span><span class="o">().</span><span class="na">startsWith</span><span class="o">(</span><span class="s">"cache."</span><span class="o">));</span>
<span class="n">cfg</span><span class="o">.</span><span class="na">setMetricExporterSpi</span><span class="o">(</span><span class="n">jmxExporter</span><span class="o">);</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='C#/.NET'></code-tab><code-tab data-tab='C++' data-unavailable='true'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code>This API is not presently available for C++. You can use XML configuration.</code></pre>
</div>
</div></code-tab></code-tabs>
</div>
<div class="sect2">
<h3 id="log">Log</h3>
<div class="paragraph">
<p><code>org.apache.ignite.spi.metric.log.LogExporterSpi</code> prints the metrics to the log file at regular intervals (1 min by default) at INFO level.</p>
</div>
<code-tabs><code-tab data-tab='XML'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="xml"><span class="nt">&lt;bean</span> <span class="na">class=</span><span class="s">"org.apache.ignite.configuration.IgniteConfiguration"</span><span class="nt">&gt;</span>
<span class="nt">&lt;property</span> <span class="na">name=</span><span class="s">"metricExporterSpi"</span><span class="nt">&gt;</span>
<span class="nt">&lt;list&gt;</span>
<span class="nt">&lt;bean</span> <span class="na">class=</span><span class="s">"org.apache.ignite.spi.metric.log.LogExporterSpi"</span><span class="nt">/&gt;</span>
<span class="nt">&lt;/list&gt;</span>
<span class="nt">&lt;/property&gt;</span>
<span class="nt">&lt;/bean&gt;</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='Java'><div class="paragraph">
<p>If you use programmatic configuration, you can change the print frequency as follows:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="java"><span class="nc">IgniteConfiguration</span> <span class="n">cfg</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">IgniteConfiguration</span><span class="o">();</span>
<span class="nc">LogExporterSpi</span> <span class="n">logExporter</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">LogExporterSpi</span><span class="o">();</span>
<span class="n">logExporter</span><span class="o">.</span><span class="na">setPeriod</span><span class="o">(</span><span class="mi">600_000</span><span class="o">);</span>
<span class="c1">//export cache metrics only</span>
<span class="n">logExporter</span><span class="o">.</span><span class="na">setExportFilter</span><span class="o">(</span><span class="n">mreg</span> <span class="o">-&gt;</span> <span class="n">mreg</span><span class="o">.</span><span class="na">name</span><span class="o">().</span><span class="na">startsWith</span><span class="o">(</span><span class="s">"cache."</span><span class="o">));</span>
<span class="n">cfg</span><span class="o">.</span><span class="na">setMetricExporterSpi</span><span class="o">(</span><span class="n">logExporter</span><span class="o">);</span>
<span class="nc">Ignite</span> <span class="n">ignite</span> <span class="o">=</span> <span class="nc">Ignition</span><span class="o">.</span><span class="na">start</span><span class="o">(</span><span class="n">cfg</span><span class="o">);</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='C#/.NET'></code-tab><code-tab data-tab='C++'></code-tab></code-tabs>
</div>
<div class="sect2">
<h3 id="opencensus">OpenCensus</h3>
<div class="paragraph">
<p><code>org.apache.ignite.spi.metric.opencensus.OpenCensusMetricExporterSpi</code> adds integration with the OpenCensus library.</p>
</div>
<div class="paragraph">
<p>To use the OpenCensus exporter:</p>
</div>
<div class="olist arabic">
<ol class="arabic">
<li>
<p><a href="/docs/2.9.0/setup#enabling-modules">Enable the 'ignite-opencensus' module</a>.</p>
</li>
<li>
<p>Add <code>org.apache.ignite.spi.metric.opencensus.OpenCensusMetricExporterSpi</code> to the list of exporters in the node configuration.</p>
</li>
<li>
<p>Configure OpenCensus StatsCollector to export to a specific system. See <a href="https://github.com/apache/ignite/tree/master/examples/src/main/java/org/apache/ignite/examples/opencensus/OpenCensusMetricsExporterExample.java">OpenCensusMetricsExporterExample.java</a> for an example and OpenCensus documentation for additional information.</p>
</li>
</ol>
</div>
<div class="paragraph">
<p>Configuration parameters:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>filter</code> - predicate that filters metrics.</p>
</li>
<li>
<p><code>period</code> - export period.</p>
</li>
<li>
<p><code>sendInstanceName</code> - if enabled, a tag with the Ignite instance name is added to each metric.</p>
</li>
<li>
<p><code>sendNodeId</code> - if enabled, a tag with the Ignite node id is added to each metric.</p>
</li>
<li>
<p><code>sendConsistentId</code> - if enabled, a tag with the Ignite node consistent id is added to each metric.</p>
</li>
</ul>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="histograms">Histograms</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The metrics that represent histograms are available in the JMX exporter only.
Histogram metrics are exported as a set of values where each value corresponds to a specific bucket and is available through a separate JMX bean attribute.
The attribute names of a histogram metric have the following format:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code>{metric_name}_{low_bound}_{high_bound}</code></pre>
</div>
</div>
<div class="paragraph">
<p>where</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>{metric_name}</code> - the name of the metric.</p>
</li>
<li>
<p><code>{low_bound}</code> - start of the bound. <code>0</code> for the first bound.</p>
</li>
<li>
<p><code>{high_bound}</code> - end of the bound. <code>inf</code> for the last bound.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Example of the metric names if the bounds are [10,100]:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>histogram_0_10</code> - less than 10.</p>
</li>
<li>
<p><code>histogram_10_100</code> - between 10 and 100.</p>
</li>
<li>
<p><code>histogram_100_inf</code> - more than 100.</p>
</li>
</ul>
</div>
</div>
</div>
<div class="copyright">