Synthetic details for HTTP monitors

Select an HTTP monitor in the Synthetic monitors page to open the Synthetic details page, which provides an overview of monitor execution results, result visualizations, and monitor properties. Powered by the Dynatrace AI engine Davis, the Synthetic details page shows you at-a-glance information and graphs, with ready links and filters to drill right down to problem details and edit monitor settings.

HTTP monitor details

Metric visualizations

The top panel shows overall monitor availability and performance infographics for the selected timeframe.

Use the filter bar at the top of the page to filter all HTTP details by one or more locations.

Select the quick links in the upper-left corner to go directly to different cards in the details page or to access HTTP monitor settings (Edit, Disable, Delete). Analyze last execution displays the results of the most recent successful and failed executions per location in JSON format.

Tags applied to your HTTP monitor are shown below the monitor name. Select Add tag to apply additional tags. Note that tags can only applied and deleted from the details page.

Purple bars above the availability or performance timelines indicate maintenance windows.

HTTP details with maintenance window

Notes

Availability

The availability infographics at the top of the page display the monitor's availability for the selected timeframe, with details of downtime and affected locations, if any. Outage (downtime) duration and affected locations infographics are displayed if the monitor is down (unavailable) at one or more locations. The number of affected locations is also displayed if there's no data from any locations for any reason.

Note that a monitor can be down at one or all locations even if no outage thresholds (global or local) have been set up. The outage duration is the sum of all downtimes in the selected timeframe, not counting overlapping downtimes. See Synthetic calculations for details on how availability and downtime are calculated.

The Availability card shows overall availability across all monitor locations, with annotations for global/local outages and global/local missing data (as when the monitor is disabled).

Hover over the All locations graph to view information about the number of locations with outages or missing data at any given point in time. Expand All locations to view availability graphs for each location. Select a block of monitor downtime (red) or availability (purple) in any availability timeline and then select Analyze to filter all HTTP details by the duration of that block.

Select Pin to dashboard to pin an HTTP monitor tile to a dashboard you own or a new dashboard.

HTTP monitor availability

Performance

The performance infographic at the top of the details page displays the HTTP monitor's average performance, that is, response time for the sum of all requests across all locations for the selected timeframe. Additional metrics are captured per request and are shown in the requests card.

The Performance card shows trend lines for minimum and maximum response time for the sum of all requests, with the shaded area representing the difference between the two values at any given time. Note that if your monitor runs from a single location, the minimum and maximum trend lines coincide.

HTTP monitor performance

Optionally, view trend lines for the average sum of all requests Response time by location or average Response time by request across all locations.

If the monitor violates a performance threshold, whether for the sum of all requests or an individual request, a solid red line appears above the performance graph for the problem duration. Additionally, any threshold for the sum of all requests appears as a dotted red line. Select the solid red bar to display a link to the problem overview page.

HTTP monitor performance problem

Analyze last execution

Select Analyze last execution in the upper-left corner of the details page or Analyze last failed execution in the Failed requests card to view the most recent successful and failed executions of the HTTP monitor per location in JSON format. Any response body and captured HTTP metrics are also displayed along with the HTTP status code per request.

Each tab holds the successful or failed executions for all locations. Use the filter bar at the top of each tab to filter the JSON by one or more locations and HTTP requests. You can view and Download the corresponding filtered JSON file for successful or failed executions. You can also Copy the URL for your environment in order to retrieve JSON files for successful or failed executions via API. Note that the GET HTTP monitor API call of the Synthetic monitor executions API v2 requires an API token—check API documentation for details.

HTTP monitor executions in JSON format

If your HTTP monitor uses credentials, monitor fields such as the URL, request body, request headers, response body, and response headers are not displayed.

Response size

The Response size card shows trend lines for minimum and maximum response size for the sum of all requests, with any shaded area representing the difference between the two values at any given time. The trend lines might coincide (as shown below), as when your monitor runs from a single location. However, response size might vary, for example, when different responses are sent based on location.

Min and max response size for all requests taken together

To track such differences, you can Show response size breakdown per location. Note that if you filter the entire details page by any locations, the toggle is no longer available.

Response size by location

HTTP requests

An HTTP monitor can consist of one or multiple HTTP requests. The HTTP requests card gives you an overview of all executed requests, their order, name, request URL, and the HTTP method used. For each request, the HTTP requests card splits performance (Response time) by the following metrics (see more in HTTP monitor metrics):

  • DNS lookup time
  • TCP connect time
  • TLS handshake time
  • Waiting
  • Download

Response time is the summation of these different metrics.

Expand a request from the list to view all performance metrics in one chart. Select a metric in the legend to remove/add it to the performance chart. Select Edit request to go to monitor settings from this card.

HTTP requests card

The Status codes tab shows the timeline of returned HTTP status codes for a particular request. (The HTTP status codes card shows the returned HTTP status codes for your HTTP monitor as a whole.)

When a request is in violation of its event-specific performance threshold, it is highlighted in red. Expand the request to see the performance timings and the threshold violated. A solid red line appears above the stacked graph for the problem duration; the request threshold appears as a dotted red line. Select the solid red bar to display a link to the problem overview page.

HTTP request performance violation

Properties

This informational card shows the number of requests, locations, frequency of monitor execution, and any applied tags. You can also see the consumption of DEM units in the selected timeframe. Select Add tag to apply additional tags. Note that tags can only applied and deleted from the details page.

HTTP monitor properties

Services

The Services card appears when the endpoint being monitored is hosted on a OneAgent-monitored host. The card displays the automatically associated monitored services. Select the link for a displayed service to view the service overview page, filtered by the HTTP monitor.

Services

Monitored applications

HTTP monitors enable you to monitor internal resources and API endpoints, for example, for key back-end APIs for login or search operations used by your mobile apps. You can link such HTTP monitors to the monitored mobile, web, or custom applications. Select Assign monitor to application. (You can link an application directly in monitor settings.)

Link an application

If Real User Monitoring (RUM) is enabled for the applications your synthetic monitor runs against, Dynatrace automatically links the RUM applications to the monitor, and the Monitored applications card is displayed. You can see the key metrics of the application and jump directly to RUM data from here.

After you've linked an HTTP monitor to an application, synthetic monitor availability is displayed directly on the application overview page, and Davis automatically associates detected synthetic monitoring problems with the linked application.

Problems

The Problems card shows performance (threshold violation) and availability (local or global outage) problems when you enable the respective thresholds in monitor settings. Expand the card to see active as well as resolved problems for the selected timeframe.

See Configure HTTP monitors for information on how to define performance and availability thresholds. See Synthetic calculations for how availability and performance are calculated and how problems are generated and dismissed. See the Synthetic alerting overview for alerting workflow and concepts, including setting up notification profiles and templates.

There are three main problem types for HTTP monitors:

  • Global outage (availability)
  • Local outage (availability)
  • Performance threshold violation (performance problem for sum of all requests or individual requests)

Problems card

Notes

  • Performance problems may combine threshold violations at the monitor as well as request levels.
  • Concurrently occurring problems may be combined into a single problem (Multiple applicatation problems).

Select a problem to view the problem overview page. Drill further into the problem to see the HTTP details page filtered by the problem duration.

Global outage problem

Problems, along with their constituent events and any corresponding status codes give you a full picture of the number and scope of your monitor's issues.

Problems, events, and status codes

Events

The Events card shows all events that compose problems. Events for active as well as resolved problems show up in the list and timeline.

Hover over a time slot in the event timeline to see the type and number of events generated in that interval. Select a time slot to view a tooltip with the events that took place in it.

Select an event type, for example, HTTP monitor location slowdown, to see the list of events. There is always one slowdown event created per location where your monitor violates request- or monitor-level performance thresholds. Select an individual event to see details.

The api.fail() method can be used to define a custom Failure message that appears in the Events card in case of failure.

Event type selected

Failed requests

The Failed requests card shows the count of every failed request in your HTTP monitor executions within the selected timeframe, broken down by request name and error code. The timeline graph shows the count of error codes—hover over any time slot to see the count of different status codes in that interval. Select an error code in the legend to hide/show it in the graph.

Select a request name to edit it in monitor settings. Select Analyze last failed execution to see the most recent failed and successful executions in JSON format.

Failed requests card

Note that a monitor that experiences downtime due to failed requests will only trigger outage problems when outage thresholds have been set up.

HTTP status codes

The HTTP status codes card displays the timeline of returned HTTP status codes for your HTTP monitor executions as a whole, which is the status code for the last executed request in the monitor, whether successful or failed. If your monitor has multiple requests, say, three, and the monitor fails at the second request, the third request is not executed. The status code reported is for the second request.

Hover over any time slot in the timeline to see the count of different status codes during that interval. Select a status code in the legend to hide/show it in the graph.

HTTP status codes