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| <li data-nav-id="/hono/docs/1.1/concepts/" title="Concepts" class="dd-item |
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| <li data-nav-id="/hono/docs/1.1/concepts/device-identity/" title="Device Identity" class="dd-item "> |
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| Device Identity |
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| Multi-Tenancy |
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| Device Provisioning |
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| <li data-nav-id="/hono/docs/1.1/concepts/connecting-devices/" title="Connecting Devices" class="dd-item "> |
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| Connecting Devices |
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| Device Notifications |
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| Command & Control |
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| Resource limits |
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| <a href="/hono/docs/1.1/concepts/connection-events/"> |
| Connection Events |
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| <li data-nav-id="/hono/docs/1.1/user-guide/device-registry/" title="Device Registry" class="dd-item "> |
| <a href="/hono/docs/1.1/user-guide/device-registry/"> |
| Device Registry |
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| <li data-nav-id="/hono/docs/1.1/user-guide/http-adapter/" title="HTTP Adapter" class="dd-item "> |
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| HTTP Adapter |
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| <li data-nav-id="/hono/docs/1.1/user-guide/mqtt-adapter/" title="MQTT Adapter" class="dd-item "> |
| <a href="/hono/docs/1.1/user-guide/mqtt-adapter/"> |
| MQTT Adapter |
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| <li data-nav-id="/hono/docs/1.1/user-guide/amqp-adapter/" title="AMQP Adapter" class="dd-item "> |
| <a href="/hono/docs/1.1/user-guide/amqp-adapter/"> |
| AMQP Adapter |
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| <li data-nav-id="/hono/docs/1.1/user-guide/kura-adapter/" title="Kura Adapter" class="dd-item "> |
| <a href="/hono/docs/1.1/user-guide/kura-adapter/"> |
| Kura Adapter |
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| <li data-nav-id="/hono/docs/1.1/user-guide/sigfox-adapter/" title="Sigfox Adapter" class="dd-item "> |
| <a href="/hono/docs/1.1/user-guide/sigfox-adapter/"> |
| Sigfox Adapter |
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| Load Tests with JMeter |
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| <i class="fas fa-sliders-h"></i> Admin Guide |
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| <li data-nav-id="/hono/docs/1.1/admin-guide/common-config/" title="Common Configuration" class="dd-item "> |
| <a href="/hono/docs/1.1/admin-guide/common-config/"> |
| Common Configuration |
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| <li data-nav-id="/hono/docs/1.1/admin-guide/auth-server-config/" title="Auth Server Configuration" class="dd-item "> |
| <a href="/hono/docs/1.1/admin-guide/auth-server-config/"> |
| Auth Server Configuration |
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| <li data-nav-id="/hono/docs/1.1/admin-guide/device-registry-config/" title="Device Registry Configuration" class="dd-item "> |
| <a href="/hono/docs/1.1/admin-guide/device-registry-config/"> |
| Device Registry Configuration |
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| </a> |
| </li> |
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| <li data-nav-id="/hono/docs/1.1/admin-guide/device-connection-config/" title="Configuring the Device Connection Service" class="dd-item "> |
| <a href="/hono/docs/1.1/admin-guide/device-connection-config/"> |
| Device Connection Service Configuration |
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| </a> |
| </li> |
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| <li data-nav-id="/hono/docs/1.1/admin-guide/http-adapter-config/" title="HTTP Adapter Configuration" class="dd-item "> |
| <a href="/hono/docs/1.1/admin-guide/http-adapter-config/"> |
| HTTP Adapter Configuration |
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| </a> |
| </li> |
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| <li data-nav-id="/hono/docs/1.1/admin-guide/amqp-adapter-config/" title="AMQP Adapter Configuration" class="dd-item "> |
| <a href="/hono/docs/1.1/admin-guide/amqp-adapter-config/"> |
| AMQP Adapter Configuration |
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| </a> |
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| <li data-nav-id="/hono/docs/1.1/admin-guide/mqtt-adapter-config/" title="MQTT Adapter Configuration" class="dd-item "> |
| <a href="/hono/docs/1.1/admin-guide/mqtt-adapter-config/"> |
| MQTT Adapter Configuration |
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| </a> |
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| <li data-nav-id="/hono/docs/1.1/admin-guide/kura-adapter-config/" title="Kura Adapter Configuration" class="dd-item "> |
| <a href="/hono/docs/1.1/admin-guide/kura-adapter-config/"> |
| Kura Adapter Configuration |
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| </a> |
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| <li data-nav-id="/hono/docs/1.1/admin-guide/hono-client-configuration/" title="Hono Client Configuration" class="dd-item "> |
| <a href="/hono/docs/1.1/admin-guide/hono-client-configuration/"> |
| Hono Client Configuration |
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| </a> |
| </li> |
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| <li data-nav-id="/hono/docs/1.1/admin-guide/amqp-network-config/" title="AMQP 1.0 Messaging Network Configuration" class="dd-item "> |
| <a href="/hono/docs/1.1/admin-guide/amqp-network-config/"> |
| AMQP 1.0 Messaging Network Configuration |
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| </a> |
| </li> |
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| <li data-nav-id="/hono/docs/1.1/admin-guide/secure_communication/" title="Secure Communication" class="dd-item "> |
| <a href="/hono/docs/1.1/admin-guide/secure_communication/"> |
| Secure Communication |
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| </a> |
| </li> |
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| <li data-nav-id="/hono/docs/1.1/admin-guide/monitoring-tracing-config/" title="Monitoring & Tracing" class="dd-item "> |
| <a href="/hono/docs/1.1/admin-guide/monitoring-tracing-config/"> |
| Monitoring & Tracing |
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| </a> |
| </li> |
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| </ul> |
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| <li data-nav-id="/hono/docs/1.1/dev-guide/" title="Developer Guide" class="dd-item |
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| "> |
| <a href="/hono/docs/1.1/dev-guide/"> |
| <i class="fas fa-tools"></i> Developer Guide |
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| <li data-nav-id="/hono/docs/1.1/dev-guide/building_hono/" title="Building from Source" class="dd-item "> |
| <a href="/hono/docs/1.1/dev-guide/building_hono/"> |
| Building from Source |
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| </a> |
| </li> |
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| <li data-nav-id="/hono/docs/1.1/dev-guide/java_client_consumer/" title="Consuming Messages from Java" class="dd-item "> |
| <a href="/hono/docs/1.1/dev-guide/java_client_consumer/"> |
| Consuming Messages from Java |
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| </a> |
| </li> |
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| <li data-nav-id="/hono/docs/1.1/dev-guide/custom_http_adapter/" title="Implement a Custom Hono HTTP Protocol Adapter" class="dd-item "> |
| <a href="/hono/docs/1.1/dev-guide/custom_http_adapter/"> |
| Implement a Custom Hono HTTP Protocol Adapter |
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| </a> |
| </li> |
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| </ul> |
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| <li data-nav-id="/hono/docs/1.1/api/" title="API" class="dd-item |
| parent |
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| <a href="/hono/docs/1.1/api/"> |
| <i class='fas fa-plug'></i> API |
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| <li data-nav-id="/hono/docs/1.1/api/telemetry/" title="Telemetry API Specification" class="dd-item "> |
| <a href="/hono/docs/1.1/api/telemetry/"> |
| Telemetry API |
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| </a> |
| </li> |
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| <li data-nav-id="/hono/docs/1.1/api/event/" title="Event API Specification" class="dd-item "> |
| <a href="/hono/docs/1.1/api/event/"> |
| Event API |
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| </a> |
| </li> |
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| <li data-nav-id="/hono/docs/1.1/api/command-and-control/" title="Command & Control API Specification" class="dd-item "> |
| <a href="/hono/docs/1.1/api/command-and-control/"> |
| Command & Control API |
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| </a> |
| </li> |
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| <li data-nav-id="/hono/docs/1.1/api/tenant/" title="Tenant API Specification" class="dd-item "> |
| <a href="/hono/docs/1.1/api/tenant/"> |
| Tenant API |
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| </a> |
| </li> |
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| <li data-nav-id="/hono/docs/1.1/api/device-connection/" title="Device Connection API Specification" class="dd-item "> |
| <a href="/hono/docs/1.1/api/device-connection/"> |
| Device Connection API |
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| <section id="shortcuts"> |
| <h3></h3> |
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| <a class="padding" href="https://www.eclipse.org/hono/" title="Hono's Homepage"><i class='fas fa-home'></i> Hono Home</a> |
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| <a class="padding" href="https://www.eclipse.org/hono/getting-started/" title="Getting started with Eclipse Hono"><i class='fas fa-plane-departure'></i> Getting Started</a> |
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| </section> |
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| <section id="footer"> |
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| <p>© 2021 <a href="https://www.eclipse.org/hono/">The Eclipse Hono Project</a></p> |
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| <p> |
| Documentation built with |
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| <a href="https://github.com/matcornic/hugo-theme-learn" target="_blank">Learn</a> theme. |
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| You might want to use the <a href="https://www.eclipse.org/hono/docs/">current stable</a> version. |
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| <a href='/hono/docs/1.1/'>Documentation</a> > <a href='/hono/docs/1.1/api/'>API</a> > Metrics |
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| <nav id="TableOfContents"> |
| <ul> |
| <li><a href="#reported-metrics">Reported Metrics</a> |
| <ul> |
| <li><a href="#common-metrics">Common Metrics</a></li> |
| <li><a href="#protocol-adapter-metrics">Protocol Adapter Metrics</a></li> |
| <li><a href="#service-metrics">Service Metrics</a></li> |
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| <h1> |
| |
| Metrics |
| </h1> |
| |
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| |
| <p>Eclipse Honoâ„¢’s components report several metrics which may be used to gain some insight |
| into the running system. For instance, the HTTP adapter reports the number of successfully |
| processed telemetry messages. Some of these metrics are considered part of Hono’s external |
| interface. This section describes the semantics and format of the metrics, how they can be retrieved |
| and how to interpret actual values.</p> |
| <h2 id="reported-metrics">Reported Metrics</h2> |
| <p>Hono uses <a href="https://micrometer.io/">Micrometer</a> in combination with Spring Boot |
| to internally collect metrics. Those metrics can be exported to different |
| back ends. Please refer to <a href="/hono/docs/1.1/admin-guide/monitoring-tracing-config/#configuring-a-metrics-back-end">Configuring Metrics</a> |
| for details.</p> |
| <p>The example deployment by default uses <a href="https://prometheus.io/">Prometheus</a> as the metrics back end.</p> |
| <p>When deploying to Kubernetes/OpenShift, the metrics reported by Hono may contain |
| environment specific tags (like the <em>pod</em> name) which are added by the Prometheus |
| scraper. However, those tags are not part of the Hono metrics definition.</p> |
| <p>Hono applications may report other metrics in addition to the ones defined here. |
| In particular, all components report metrics regarding the JVM’s internal state, e.g. |
| memory consumption and garbage collection status. Those metrics are not considered |
| part of Hono’s <em>official</em> metrics definition. However, all those metrics |
| will still contain tags as described below.</p> |
| <h3 id="common-metrics">Common Metrics</h3> |
| <p>Tags for common metrics are:</p> |
| <table> |
| <thead> |
| <tr> |
| <th>Tag</th> |
| <th>Value</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><em>host</em></td> |
| <td><em>string</em></td> |
| <td>The name of the host that the component reporting the metric is running on</td> |
| </tr> |
| <tr> |
| <td><em>component-type</em></td> |
| <td><code>adapter</code>, <code>service</code></td> |
| <td>The type of component reporting the metric</td> |
| </tr> |
| <tr> |
| <td><em>component-name</em></td> |
| <td><em>string</em></td> |
| <td>The name of the component reporting the metric.</td> |
| </tr> |
| </tbody> |
| </table> |
| <p>The names of Hono’s standard components are as follows:</p> |
| <table> |
| <thead> |
| <tr> |
| <th>Component</th> |
| <th><em>component-name</em></th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td>Auth Server</td> |
| <td><code>hono-auth</code></td> |
| </tr> |
| <tr> |
| <td>Device Registry</td> |
| <td><code>hono-registry</code></td> |
| </tr> |
| <tr> |
| <td>AMQP adapter</td> |
| <td><code>hono-amqp</code></td> |
| </tr> |
| <tr> |
| <td>CoAP adapter</td> |
| <td><code>hono-coap</code></td> |
| </tr> |
| <tr> |
| <td>HTTP adapter</td> |
| <td><code>hono-http</code></td> |
| </tr> |
| <tr> |
| <td>Kura adapter</td> |
| <td><code>hono-kura-mqtt</code></td> |
| </tr> |
| <tr> |
| <td>MQTT adapter</td> |
| <td><code>hono-mqtt</code></td> |
| </tr> |
| <tr> |
| <td>Lora adapter</td> |
| <td><code>hono-lora</code></td> |
| </tr> |
| <tr> |
| <td>Sigfox adapter</td> |
| <td><code>hono-sigfox</code></td> |
| </tr> |
| </tbody> |
| </table> |
| <h3 id="protocol-adapter-metrics">Protocol Adapter Metrics</h3> |
| <p>Additional tags for protocol adapters are:</p> |
| <table> |
| <thead> |
| <tr> |
| <th>Name</th> |
| <th>Value</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><em>direction</em></td> |
| <td><code>one-way</code>, <code>request</code>, <code>response</code></td> |
| <td>The direction in which a Command & Control message is being sent:<br><code>one-way</code> indicates a command sent to a device for which the sending application doesn’t expect to receive a response.<br><code>request</code> indicates a command request message sent to a device.<br><code>response</code> indicates a command response received from a device.</td> |
| </tr> |
| <tr> |
| <td><em>qos</em></td> |
| <td><code>0</code>, <code>1</code>, <code>unknown</code></td> |
| <td>The quality of service used for a telemetry or event message.<br><code>0</code> indicates <em>at most once</em>,<br><code>1</code> indicates <em>at least once</em> and<br> <code>none</code> indicates unknown delivery semantics.</td> |
| </tr> |
| <tr> |
| <td><em>status</em></td> |
| <td><code>forwarded</code>, <code>unprocessable</code>, <code>undeliverable</code></td> |
| <td>The processing status of a message.<br><code>forwarded</code> indicates that the message has been forwarded to a downstream consumer<br><code>unprocessable</code> indicates that the message has not been processed not forwarded, e.g. because the message was malformed<br><code>undeliverable</code> indicates that the message could not be forwarded, e.g. because there is no downstream consumer or due to an infrastructure problem</td> |
| </tr> |
| <tr> |
| <td><em>tenant</em></td> |
| <td><em>string</em></td> |
| <td>The identifier of the tenant that the metric is being reported for</td> |
| </tr> |
| <tr> |
| <td><em>ttd</em></td> |
| <td><code>command</code>, <code>expired</code>, <code>none</code></td> |
| <td>A status indicating the outcome of processing a TTD value contained in a message received from a device.<br><code>command</code> indicates that a command for the device has been included in the response to the device’s request for uploading the message.<br><code>expired</code> indicates that a response without a command has been sent to the device.<br><code>none</code> indicates that either no TTD value has been specified by the device or that the protocol adapter does not support it.</td> |
| </tr> |
| <tr> |
| <td><em>type</em></td> |
| <td><code>telemetry</code>, <code>event</code></td> |
| <td>The type of (downstream) message that the metric is being reported for.</td> |
| </tr> |
| </tbody> |
| </table> |
| <p>Metrics provided by the protocol adapters are:</p> |
| <table> |
| <thead> |
| <tr> |
| <th>Metric</th> |
| <th>Type</th> |
| <th>Tags</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><em>hono.commands.received</em></td> |
| <td>Timer</td> |
| <td><em>host</em>, <em>component-type</em>, <em>component-name</em>, <em>tenant</em>, <em>type</em>, <em>status</em>, <em>direction</em></td> |
| <td>The time it took to process a message conveying a command or a response to a command.</td> |
| </tr> |
| <tr> |
| <td><em>hono.commands.payload</em></td> |
| <td>DistributionSummary</td> |
| <td><em>host</em>, <em>component-type</em>, <em>component-name</em>, <em>tenant</em>, <em>type</em>, <em>status</em>, <em>direction</em></td> |
| <td>The number of bytes conveyed in the payload of a command message.</td> |
| </tr> |
| <tr> |
| <td><em>hono.connections.authenticated</em></td> |
| <td>Gauge</td> |
| <td><em>host</em>, <em>component-type</em>, <em>component-name</em>, <em>tenant</em></td> |
| <td>Current number of connected, authenticated devices. <br/> <strong>NB</strong> This metric is only supported by protocol adapters that maintain <em>connection state</em> with authenticated devices. In particular, the HTTP adapter does not support this metric.</td> |
| </tr> |
| <tr> |
| <td><em>hono.connections.unauthenticated</em></td> |
| <td>Gauge</td> |
| <td><em>host</em>, <em>component-type</em>, <em>component-name</em></td> |
| <td>Current number of connected, unauthenticated devices. <br/> <strong>NB</strong> This metric is only supported by protocol adapters that maintain <em>connection state</em> with authenticated devices. In particular, the HTTP adapter does not support this metric.</td> |
| </tr> |
| <tr> |
| <td><em>hono.connections.authenticated.duration</em></td> |
| <td>Timer</td> |
| <td><em>host</em>, <em>component-type</em>, <em>component-name</em>, <em>tenant</em></td> |
| <td>The overall amount of time that authenticated devices have been connected to protocol adapters. <br/> <strong>NB</strong> This metric is only supported by protocol adapters that maintain <em>connection state</em> with authenticated devices. In particular, the HTTP adapter does not support this metric.</td> |
| </tr> |
| <tr> |
| <td><em>hono.messages.received</em></td> |
| <td>Timer</td> |
| <td><em>host</em>, <em>component-type</em>, <em>component-name</em>, <em>tenant</em>, <em>type</em>, <em>status</em>, <em>qos</em>, <em>ttd</em></td> |
| <td>The time it took to process a message conveying telemetry data or an event.</td> |
| </tr> |
| <tr> |
| <td><em>hono.messages.payload</em></td> |
| <td>DistributionSummary</td> |
| <td><em>host</em>, <em>component-type</em>, <em>component-name</em>, <em>tenant</em>, <em>type</em>, <em>status</em></td> |
| <td>The number of bytes conveyed in the payload of a telemetry or event message.</td> |
| </tr> |
| </tbody> |
| </table> |
| <h4 id="minimum-message-size">Minimum Message Size</h4> |
| <p>If a minimum message size is configured for a <a href="/hono/docs/1.1/api/tenant/#tenant-information-format">tenant</a>, |
| then the payload size of the telemetry, event and command messages are calculated in accordance with the configured |
| value and then reported to the metrics by the AMQP, HTTP and MQTT protocol adapters. If minimum message size is not |
| configured for a tenant then the actual message payload size is reported.</p> |
| <p>Assume that the minimum message size for a tenant is configured as 4096 bytes (4KB). The payload size of |
| an incoming message with size 1KB is calculated as 4KB by the protocol adapters and reported to the metrics system. |
| For an incoming message of size 10KB, it is reported as 12KB.</p> |
| <h3 id="service-metrics">Service Metrics</h3> |
| <p>Hono’s service components do not report any metrics at the moment.</p> |
| |
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