URL¶
This function 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 demonstrates 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 the corresponding data.
This section focuses on URL monitoring.
Going to the URL Page¶
Log in to the management console.
Click
on the left and choose Management & Deployment > Application Performance Management.In the navigation pane, choose Application Monitoring > Metrics.
In the tree on the left, click
next to the target environment. On the URL tab page that is displayed, view URL monitoring information of all instances.
Figure 1 Going to the URL page¶
On the displayed URL tab page, select a target instance and monitoring item to view the monitoring data in different metric sets.
Figure 2 Selecting an instance and monitoring item¶
Select a time range. Default: Last 20 minutes.
Options: Last 20 minutes, Last hour, Last 3 hours, Last 6 hours, Last day, Today, Yesterday, Last week, Last month, or Custom.
Figure 3 Selecting a time range¶
Click
in the upper right corner of the list and select the metric data you want to view.
Viewing URL Monitoring Data¶
URL summary
For common URL calls, the system collects the metrics of each URL. For details about the metrics, see Table 1.
Figure 4 URL summary under URL monitoring¶
Metric Set | Metric | Description |
|---|---|---|
URL summary | url | URL |
method | Request HTTP method | |
Calls | Number of times that the URL is called | |
Avg RT (ms) | Average response time of the URL in a collection period | |
Errors | Number of call errors of the URL | |
Max Concurrency | Maximum concurrency of the URL | |
Max RT (ms) | Maximum response time of the URL in a collection period | |
Apdex | Application performance index (Apdex), which indicates users' satisfaction. The value ranges from 0 to 1. The closer the value is to 1, the higher the satisfaction is. | |
0 ms-10 ms | Number of requests with 0 ms-10 ms response time | |
10 ms-100 ms | Number of requests with 10 ms-100 ms response time | |
100 ms-500 ms | Number of requests with 100 ms-500 ms response time | |
500 ms-1s | Number of requests with 500 ms-1s response time | |
1s-10s | Number of requests with 1s-10s response time | |
10s-n | Number of requests with response time longer than 10s |
URL invocation is the starting point of tracing. When you click a URL, the tracing page is displayed, showing the URL invocation condition in a certain period (default: 20 minutes).
You can add a URL for tracing by referring to Configuring URL Tracing.
Click a number in blue (such as those in the Calls or Avg RT (ms) column) to view more details.
Status code summary
APM supports status code-based summary. The system collects the metrics of each URL. For details about the metrics, see Table 2.
Figure 5 Status code summary under URL monitoring¶
Metric Set | Metric | Description |
|---|---|---|
Status code summary | code | Status code |
Count | Number of times that the status code has occurred | |
Latest URL | Sample URL which returns the status code in a collection period |
Click a status code in the code column. The tracing page is displayed, showing the invocation condition of the status code of the selected instance in the environment in last 20 minutes (default).
Click a number in the Count column to view the trend of the status code in a specified period.
Click the latest URL to view the invocation details of the corresponding status code.
Cluster summary
APM can summarize metrics by cluster. For details about the metrics, see Table 3.
Figure 6 Cluster summary under URL monitoring¶
Metric Set | Parameter | Description |
|---|---|---|
Cluster summary | Cluster ID | Cluster ID of the caller |
Calls | Number of times the cluster is called | |
Avg RT (ms) | Average response time in a collection period | |
Errors | Number of times that the cluster fails to be called |
Click a number in blue (such as those in the Calls or Avg RT (ms) column) to view more details.
Overview
View the metric trend of the selected instance on the Overview tab page. For details about the metrics, see Table 4.
Figure 7 Overview under URL monitoring¶
Metric Set | Metric | Description |
|---|---|---|
Overview | Total Requests | Total number of URL requests |
Avg RT (ms) | Average response time of the URL | |
Errors | Total number of URL errors | |
Apdex | Users' satisfaction towards the URL |