Choosing an application traffic percentage to monitor
The coverage that you choose for the percentage of application traffic to monitor determines how many city-networks (client locations and ASNs, typically internet service providers) for your application are monitored, up to an optional city-networks maximum limit that you can also set.
If you choose to monitor less than 100% of your application traffic, an observability gap might exist with your monitor. That's because if there are health events that Amazon CloudWatch Internet Monitor creates where you aren't monitoring traffic, you won't be aware of those issues. You might also have less coverage for the performance and availability score information about client access to your application.
The following sections describe options to explore traffic percentage settings and coverage, and to get an idea about the impact of increasing or decreasing coverage.
Explore changing your application traffic percentage
You can explore values that you might want to change your application traffic percentage to, by viewing the number of city-networks monitored when you change the percentage. The procedure in this section provides step-by-step information.
In the Internet Monitor console, you can try increasing or decreasing the application traffic percentage for your monitor, and view the estimated number of your city-networks that would be covered as a result. With this option, you can quickly see how changing your traffic percentage affects the number of city-monitors are monitored. This can help you to get a feel for what a good application traffic percentage to choose might be, for your application.
To explore monitoring coverage by increasing and decreasing application traffic percentage
Open the CloudWatch console at https://console.amazonaws.cn/cloudwatch/
. In the left navigation pane, under Network monitoring, choose Internet Monitor.
In your list of monitors, choose a monitor.
On the Overview tab, in the Monitored traffic section, choose the percentage graph, and then choose Update monitoring coverage.
In the Explore and set traffic monitoring coverage dialog, click the arrows to increase or decrease the percentage of traffic to monitor. By choosing 100% traffic, you can see how many city-networks are monitored with full coverage for monitoring your application.
To learn more about how the number of city-networks monitored (estimated here) might affect your costs, choose the link to the CloudWatch Pricing calculator
, and then scroll down to Internet Monitor. To set a new percentage of traffic to monitor, choose Update monitor coverage. Or, to keep the current coverage level, choose Cancel.
View the number of city-networks monitored at different traffic percentage settings
You can view the number of city-networks that would be monitored for your application at different application traffic percentages. The procedure in this section provides step-by-step information.
In the Internet Monitor console, you can view graphs that show how coverage for your city-networks would change at different of application traffic percentages, over a time interval that you specify. This is a quick way to visualize and compare the monitoring coverage for your application at specific traffic percentages, all on one graph.
To view graphs of application traffic percentage and corresponding city-networks coverage
Open the CloudWatch console at https://console.amazonaws.cn/cloudwatch/
. In the left navigation pane, under Network monitoring, choose Internet Monitor.
In your list of monitors, choose a monitor.
Choose the Traffic insights tab, and scroll down to Internet traffic graphs.
Under Compare options for traffic coverage, in the drop-down list, select one or more percentages. You can choose one or more application traffic percentages, and the graph of Total monitored city-networks is updated to display the monitoring coverage Internet Monitor provides for that traffic percentage. By choosing City-networks at 100% traffic, you can see how many city-networks are monitored with full coverage for monitoring your application.
Keep in mind the following:
Traffic coverage is computed based on the number of city-networks in the previous hour of your application traffic. This means that, after you choose a specific percentage of traffic to monitor, fewer city-networks might be monitored for your application than is shown here in a traffic coverage comparison graph.
To make sure that all your application traffic is monitored, set
TrafficPercentageToMonitorto 100 and don’t setMaxCityNetworksToMonitor. Alternatively, you can setMaxCityNetworksToMonitorto 500,000, the upper limit in Internet Monitor.If you set a city-networks maximum limit, the total number of monitored city-networks never exceeds that limit, regardless of the application traffic percentage option that you select.
You can learn more about how the number of city-networks monitored might affect your costs. On the Pricing calculator for CloudWatch page
, scroll down to Internet Monitor.
To set a new percentage of traffic to monitor, under Explore other traffic coverage options, choose Update monitoring coverage. In the dialog, choose a percentage of traffic, and then choose Update monitor coverage.