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| Detecting Dead Connections |
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| Detecting Broker Issues (Critical Analysis) |
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| Message Expiry |
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| Large Messages |
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| Paging |
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| Scheduled Messages |
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| Last-Value Queues |
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| Non-Destructive Queues |
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| Ring Queues |
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| Retroactive Addresses |
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| Exclusive Queues |
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| Message Grouping |
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| Consumer Priority |
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| Extra Acknowledge Modes |
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| Management |
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| Management Console |
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| Metrics |
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| Security |
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| <a href="masking-passwords.html"> |
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| Masking Passwords |
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| <a href="broker-plugins.html"> |
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| Broker Plugins |
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| </a> |
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| <li class="chapter " data-level="1.53" data-path="resource-limits.html"> |
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| <a href="resource-limits.html"> |
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| Resource Limits |
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| </a> |
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| <li class="chapter " data-level="1.54" data-path="jms-bridge.html"> |
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| <a href="jms-bridge.html"> |
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| The JMS Bridge |
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| </a> |
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| <li class="chapter " data-level="1.55" data-path="client-reconnection.html"> |
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| <a href="client-reconnection.html"> |
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| Client Reconnection and Session Reattachment |
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| </a> |
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| <li class="chapter " data-level="1.56" data-path="diverts.html"> |
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| <a href="diverts.html"> |
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| Diverting and Splitting Message Flows |
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| </a> |
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| Core Bridges |
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| <a href="transformers.html"> |
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| Transformers |
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| </a> |
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| <li class="chapter " data-level="1.59" data-path="duplicate-detection.html"> |
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| <a href="duplicate-detection.html"> |
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| Duplicate Message Detection |
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| </a> |
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| <li class="chapter " data-level="1.60" data-path="clusters.html"> |
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| <a href="clusters.html"> |
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| Clusters |
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| </a> |
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| <li class="chapter " data-level="1.61" data-path="federation.html"> |
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| <a href="federation.html"> |
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| Federation |
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| <li class="chapter " data-level="1.61.1" data-path="federation-address.html"> |
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| Address Federation |
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| </a> |
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| <li class="chapter " data-level="1.61.2" data-path="federation-queue.html"> |
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| <a href="federation-queue.html"> |
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| Queue Federation |
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| </a> |
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| High Availability and Failover |
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| </a> |
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| <a href="connection-routers.html"> |
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| Connection Routers |
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| </a> |
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| <li class="chapter " data-level="1.64" data-path="graceful-shutdown.html"> |
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| <a href="graceful-shutdown.html"> |
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| Graceful Server Shutdown |
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| </a> |
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| <li class="chapter " data-level="1.65" data-path="libaio.html"> |
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| <a href="libaio.html"> |
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| Libaio Native Libraries |
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| </a> |
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| <li class="chapter " data-level="1.66" data-path="thread-pooling.html"> |
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| <a href="thread-pooling.html"> |
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| Thread management |
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| </a> |
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| <a href="web-server.html"> |
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| Embedded Web Server |
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| </a> |
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| <a href="logging.html"> |
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| Logging |
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| </a> |
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| <a href="." >Metrics</a> |
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| <h1 id="metrics">Metrics</h1> |
| <p>Apache ActiveMQ Artemis can export metrics to a variety of monitoring systems |
| via the <a href="https://micrometer.io/" target="_blank">Micrometer</a> vendor-neutral application metrics |
| facade.</p> |
| <p>Important runtime metrics have been instrumented via the Micrometer API, and |
| all a user needs to do is implement <code>org.apache.activemq.artemis.core.server.metrics.ActiveMQMetricsPlugin</code> |
| in order to instantiate and configure a <code>io.micrometer.core.instrument.MeterRegistry</code> |
| implementation. Relevant implementations of <code>MeterRegistry</code> are available from |
| the <a href="https://github.com/micrometer-metrics/micrometer/tree/master/implementations" target="_blank">Micrometer code-base</a>.</p> |
| <p>This is a simple interface:</p> |
| <pre><code class="lang-java"><span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">interface</span> <span class="hljs-title">ActiveMQMetricsPlugin</span> <span class="hljs-keyword">extends</span> <span class="hljs-title">Serializable</span> </span>{ |
| |
| <span class="hljs-function">ActiveMQMetricsPlugin <span class="hljs-title">init</span><span class="hljs-params">(Map<String, String> options)</span></span>; |
| |
| <span class="hljs-function">MeterRegistry <span class="hljs-title">getRegistry</span><span class="hljs-params">()</span></span>; |
| } |
| </code></pre> |
| <p>When the broker starts it will call <code>init</code> and pass in the <code>options</code> which can |
| be specified in XML as key/value properties. At this point the plugin should |
| instantiate and configure the <code>io.micrometer.core.instrument.MeterRegistry</code> |
| implementation.</p> |
| <p>Later during the broker startup process it will call <code>getRegistry</code> in order to |
| get the <code>MeterRegistry</code> implementation and use it for registering meters.</p> |
| <p>The broker ships with two <code>ActiveMQMetricsPlugin</code> implementations:</p> |
| <ul> |
| <li><p><code>org.apache.activemq.artemis.core.server.metrics.plugins.LoggingMetricsPlugin</code> |
| This plugin simply logs metrics. It's not very useful for production, but can |
| serve as a demonstration of the Micrometer integration. It takes no key/value |
| properties for configuration.</p> |
| </li> |
| <li><p><code>org.apache.activemq.artemis.core.server.metrics.plugins.SimpleMetricsPlugin</code> |
| This plugin is used for testing. It is in-memory only and provides no external |
| output. It takes no key/value properties for configuration.</p> |
| </li> |
| </ul> |
| <h2 id="metrics">Metrics</h2> |
| <p>The following metrics are exported, categorized by component. A description for |
| each metric is exported along with the metric itself therefore the description |
| will not be repeated here.</p> |
| <p><strong>Broker</strong></p> |
| <ul> |
| <li>connection.count</li> |
| <li>total.connection.count</li> |
| <li>address.memory.usage</li> |
| </ul> |
| <p><strong>Address</strong></p> |
| <ul> |
| <li>routed.message.count</li> |
| <li>unrouted.message.count</li> |
| </ul> |
| <p><strong>Queue</strong></p> |
| <ul> |
| <li>message.count</li> |
| <li>durable.message.count</li> |
| <li>persistent.size</li> |
| <li>durable.persistent.size</li> |
| <li>delivering.message.count</li> |
| <li>delivering.durable.message.count</li> |
| <li>delivering.persistent.size</li> |
| <li>delivering.durable.persistent.size</li> |
| <li>scheduled.message.count</li> |
| <li>scheduled.durable.message.count</li> |
| <li>scheduled.persistent.size</li> |
| <li>scheduled.durable.persistent.size</li> |
| <li>messages.acknowledged</li> |
| <li>messages.added</li> |
| <li>messages.killed</li> |
| <li>messages.expired</li> |
| <li>consumer.count</li> |
| </ul> |
| <p>It may appear that some higher level broker metrics are missing (e.g. total |
| message count). However, these metrics can be deduced by aggregating the |
| lower level metrics (e.g. aggregate the message.count metrics from all queues |
| to get the total).</p> |
| <p>JVM memory metrics are also exported by default and GC, thread metrics, and |
| <a href="https://netty.io/4.1/api/io/netty/buffer/PooledByteBufAllocatorMetric.html" target="_blank">Netty</a> |
| metrics can be configured</p> |
| <h2 id="configuration">Configuration</h2> |
| <p>Metrics for all addresses and queues are enabled by default. If you want to |
| disable metrics for a particular address or set of addresses you can do so by |
| setting the <code>enable-metrics</code> <code>address-setting</code> to <code>false</code>.</p> |
| <p>In <code>broker.xml</code> use the <code>metrics</code> element to configure which JVM metrics are |
| reported and to configure the plugin itself. Here's a configuration with all |
| JVM metrics:</p> |
| <pre><code class="lang-xml"><span class="hljs-tag"><<span class="hljs-name">metrics</span>></span> |
| <span class="hljs-tag"><<span class="hljs-name">jvm-memory</span>></span>true<span class="hljs-tag"></<span class="hljs-name">jvm-memory</span>></span> <span class="hljs-comment"><!-- defaults to true --></span> |
| <span class="hljs-tag"><<span class="hljs-name">jvm-gc</span>></span>true<span class="hljs-tag"></<span class="hljs-name">jvm-gc</span>></span> <span class="hljs-comment"><!-- defaults to false --></span> |
| <span class="hljs-tag"><<span class="hljs-name">jvm-threads</span>></span>true<span class="hljs-tag"></<span class="hljs-name">jvm-threads</span>></span> <span class="hljs-comment"><!-- defaults to false --></span> |
| <span class="hljs-tag"><<span class="hljs-name">netty-pool</span>></span>true<span class="hljs-tag"></<span class="hljs-name">netty-pool</span>></span> <span class="hljs-comment"><!-- defaults to false --></span> |
| <span class="hljs-tag"><<span class="hljs-name">plugin</span> <span class="hljs-attr">class-name</span>=<span class="hljs-string">"org.apache.activemq.artemis.core.server.metrics.plugins.LoggingMetricsPlugin"</span>/></span> |
| <span class="hljs-tag"></<span class="hljs-name">metrics</span>></span> |
| </code></pre> |
| <p>The plugin can also be configured with key/value properties in order to |
| customize the implementation as necessary, e.g.:</p> |
| <pre><code class="lang-xml"><span class="hljs-tag"><<span class="hljs-name">metrics</span>></span> |
| <span class="hljs-tag"><<span class="hljs-name">plugin</span> <span class="hljs-attr">class-name</span>=<span class="hljs-string">"org.example.MyMetricsPlugin"</span>></span> |
| <span class="hljs-tag"><<span class="hljs-name">property</span> <span class="hljs-attr">key</span>=<span class="hljs-string">"host"</span> <span class="hljs-attr">value</span>=<span class="hljs-string">"example.org"</span> /></span> |
| <span class="hljs-tag"><<span class="hljs-name">property</span> <span class="hljs-attr">key</span>=<span class="hljs-string">"port"</span> <span class="hljs-attr">value</span>=<span class="hljs-string">"5162"</span> /></span> |
| <span class="hljs-tag"><<span class="hljs-name">property</span> <span class="hljs-attr">key</span>=<span class="hljs-string">"foo"</span> <span class="hljs-attr">value</span>=<span class="hljs-string">"10"</span> /></span> |
| <span class="hljs-tag"></<span class="hljs-name">plugin</span>></span> |
| <span class="hljs-tag"></<span class="hljs-name">metrics</span>></span> |
| </code></pre> |
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