Monitoring Component Performance Metrics

Procedure

1. Log in to the APM console.
2. Click on the left and choose Management & Governance > Application Performance Management.
3. In the navigation pane, choose Performance Monitoring > Components.
4. In the filter bar on the left, select a region and an application.
   • In the search box, specify an application and component to filter data.
   • Click in the upper right corner of the list and select the columns to display.

   Table 1 Component metrics

   Metric	Description
   Component	Component name.
   Language	Programming language of the component.
   Environment	Environment where the component is located.
   Requests/s	Number of requests per second of the component.
   Avg. RT	Average response time in a collection period.
   Error Rate	Error rate of the component = Number of abnormal URL calls of the component/Total number of URL calls of the component
   Alarms	Severity of the alarms generated by the component and the number of alarms. The alarm severity can be major or minor.
   Application	Application where the component is located.

5. Click a component name in the Component column. The component details page is displayed.
6. Click the name of a monitoring item. The corresponding monitoring item page is displayed. By default, the Overview page is displayed. For details about each monitoring item of the component, see Table 2.

   Table 2 Monitoring items of a component

   Module	Description
   Overview	The Overview page summarizes the performance monitoring data of component instances and displays Metric Overview, Performance Analysis, Resource Usage, and Top 5 APIs of the component in a specified period (max.: 30 days). For details, see Viewing the Component Overview.
   Topology	The topology displays the call relationships between services within a period. The statistics can be collected from the caller or the callee. You can also view the trend. For details, see Viewing the Call Relationships Between Components in the Topology.
   URL	This type of monitoring item monitors the calls of the current application by external services. It includes URL, Dubbo server, CSE server, CSEProvider cluster, and FunctionGraph monitoring. This type of monitoring item reflects the actual external status of the entire service. For example, if the average response time of a URL is long, it means that external users take a long time to query data. For details, see Viewing the URL Monitoring Item of a Component.
   Info	This type of monitoring item monitors JVMInfo, JVMMonitor, GC, threads, and JavaMethod. For details, see Viewing the Info Monitoring Item of a Component.
   Exceptions	This type of monitoring item monitors application exception logs. Take the monitoring of Java exception logs as an example. Once you use the log system to print logs, they will be collected by APM. The types of exceptions to be collected vary depending on the collector type. For details, see Viewing the Exception Monitoring Item of a Component.
   External Calls	This type of monitoring item monitors the calls of external services by the current application. It includes CSEConsumer, ApacheHttpClient, ApacheHttpAsyncClient, DubboConsumer, and HttpClient. For details, see Viewing the External Call Monitoring Item of a Component.
   Communication Protocols	This type of monitoring item monitors communication protocols, including the WebSocket protocol. For details, see Viewing the Communication Protocol Monitoring Item of a Component.
   Databases	This type of monitoring item monitors database access. The databases that can be monitored include the C3P0, Cassandra, ClickHouse, DBCP, Druid, EsRestClient, GaussDB, Hikari, Jetcd, ObsClient, MySQL, PostgreSQL, Oracle, HBase, and MongoDB. APM collects statement execution details to help you locate performance problems in code. For details, see Viewing the Database Monitoring Item of a Component.
   Web Containers	This type of monitoring item monitors web containers, including Tomcat. For details, see Viewing the Web Container Monitoring Item of a Component.
   Message Queues	This type of monitoring item monitors message queues, including KafkaProducer. For details, see Viewing the Message Queue Monitoring Item of a Component.
   RPCs	This type of monitoring item monitors remote procedure calls, including GRPCServer. For details, see Viewing the RPC Monitoring Item of a Component.
   Logs	You can enter a keyword and specify a time range to search for logs. For details, see Viewing the Log Monitoring Item of a Component.
   Infrastructure	Different graphs (such as line graphs and digit graphs) can be displayed on one dashboard, so you can view monitoring data comprehensively. For details, see Viewing the Infrastructure of a Component.
   Tracing	When the calls between enterprise microservices are complex, APM Agents sample some requests, and intercept corresponding requests and subsequent call information. For example, in the scenario where service A calls service B and then calls service C, after service A receives a request, APM determines whether to trace the request based on the intelligent sampling algorithm. For details, see Viewing the Traces of a Component.
   Component Settings	Component settings include log association, Profiler, component/infrastructure association analysis, full sampling, and database monitoring settings. For details, see Configuring Component Settings for Performance Monitoring.