RUM Browser Data Collected

Overview

The RUM Browser SDK generates events that have associated metrics and attributes. Every RUM event has all of the default attributes, for example, the URL of the page (view.url) and user information such as their device type (device.type) and their country (geo.country).

There are additional metrics and attributes specific to a given event type. For example, the view.loading_time metric is associated with view events, and the resource.method attribute is associated with resource events.

Event TypeRetentionDescription
Session30 daysA user session begins when a user starts browsing the web application. It contains high-level information about the user (browser, device, geo-location). It aggregates all RUM events collected during the user journey with a unique session.id attribute. Note: The session resets after 15 minutes of inactivity.
View30 daysA view event is generated each time a user visits a page of the web application. While the user remains on the same page, resource, long-task, error, and action events are linked to the related RUM view with the view.id attribute.
Resource15 daysA resource event is generated for images, XHR, Fetch, CSS, or JS libraries loaded on a webpage. It includes detailed loading timing information.
Long Task15 daysA long task event is generated for any task in the browser that blocks the main thread for more than 50ms.
Error30 daysRUM collects every frontend error emitted by the browser.
Action30 daysRUM action events track user interactions during a user journey and can also be manually sent to monitor custom user actions.

The following diagram illustrates the RUM event hierarchy:

RUM Event hierarchy

Default attributes

Each of these event types has the following attributes attached by default, so you can use them regardless of the RUM event type being queried.

Core

Attribute nameTypeDescription
typestringThe type of the event (for example, view or resource).
application.idstringThe Datadog application ID generated when you create a RUM application.
servicestringA service denotes a set of pages built by a team that offers a specific functionality in your browser application. You can assign web pages to a service with manual view tracking.

View attributes

RUM action, error, resource, and long task events contain information about the active RUM view event at the time of collection:

Attribute nameTypeDescription
view.idstringRandomly generated ID for each page view.
view.loading_typestringThe type of page load: initial_load or route_change. For more information, see the single page applications support docs.
view.referrerstringThe URL of the previous web page from which a link to the currently requested page was followed.
view.urlstringThe view URL.
view.url_hashstringThe hash part of the URL.
view.url_hoststringThe host part of the URL.
view.url_pathstringThe path part of the URL.
view.url_path_groupstringThe automatic URL group generated for similar URLs (for example, /dashboard/? for /dashboard/123 and /dashboard/456).
view.url_queryobjectThe query string parts of the URL decomposed as query params key/value attributes.
view.url_schemeobjectThe scheme part of the URL.

Device

The following device-related attributes are attached automatically to all events collected by Datadog:

Attribute nameTypeDescription
device.typestringThe device type as reported by the device (User-Agent HTTP header).
device.brandstringThe device brand as reported by the device (User-Agent HTTP header).
device.modelstringThe device model as reported by the device (User-Agent HTTP header).
device.namestringThe device name as reported by the device (User-Agent HTTP header).

Operating system

The following OS-related attributes are attached automatically to all events collected by Datadog:

Attribute nameTypeDescription
os.namestringThe OS name as reported by the device (User-Agent HTTP header).
os.versionstringThe OS version as reported by the device (User-Agent HTTP header).
os.version_majorstringThe OS version major as reported by the device (User-Agent HTTP header).

Geo-location

The following attributes are related to the geo-location of IP addresses:

FullnameTypeDescription
geo.countrystringName of the country.
geo.country_iso_codestringISO Code of the country (for example, US for the United States or FR for France).
geo.country_subdivisionstringName of the first subdivision level of the country (for example, California in the United States or the Sarthe department in France).
geo.continent_codestringISO code of the continent (EU, AS, NA, AF, AN, SA, OC).
geo.continentstringName of the continent (Europe, Australia, North America, Africa, Antarctica, South America, Oceania).
geo.citystringThe name of the city (for example, Paris or New York).

Note: By default, Datadog stores the client IP address. If you want to stop collecting IP addresses, contact Support. This does not impact the collection of geo-location attributes listed above.

User attributes

In addition to default attributes, you can add user-related data to all RUM event types by identifying user sessions. This lets you follow the journey of a given user, figure out which users are the most impacted by errors, and monitor performance for your most important users.

Event-specific metrics and attributes

Session metrics

MetricTypeDescription
session.time_spentnumber (ns)Duration of the user session.
session.view.countnumberCount of all views collected for this session.
session.error.countnumberCount of all errors collected for this session.
session.resource.countnumberCount of all resources collected for this session.
session.action.countnumberCount of all actions collected for this session.
session.long_task.countnumberCount of all long tasks collected for this session.

Session attributes

Attribute nameTypeDescription
session.idstringRandomly generated ID for each session.
session.ipstringClient IP address. If you want to stop collecting this attribute, contact Support.
session.is_activebooleanIndicates if the session is currently active. The session ends if a user navigates away from the application or closes the browser window, and expires after 4 hours of activity or 15 minutes of inactivity.
session.typestringThe type of session: user or synthetics. Sessions from Synthetic Monitoring Browser Tests are excluded from billing.
session.referrerstringThe URL of the previous web page from which a link to the currently requested page was followed.
session.initial_view.idstringThe ID of the first RUM view generated by the user.
session.initial_view.url_hoststringThe host part of the URL.
session.initial_view.url_pathstringThe path part of the URL.
session.initial_view.url_path_groupstringThe automatic URL group generated for similar URLs (for example, /dashboard/? for /dashboard/123 and /dashboard/456).
session.initial_view.url_queryobjectThe query string parts of the URL decomposed as query params key/value attributes.
session.initial_view.url_schemeobjectThe scheme part of the URL.
session.last_view.idstringThe ID of the last RUM view generated by the user.
session.last_view.url_hoststringThe host part of the URL.
session.last_view.url_pathstringThe path part of the URL.
session.last_view.url_path_groupstringThe automatic URL group generated for similar URLs (for example, /dashboard/? for /dashboard/123 and /dashboard/456).
session.last_view.url_queryobjectThe query string parts of the URL decomposed as query params key/value attributes.
session.last_view.url_schemeobjectThe scheme part of the URL.

View timing metrics

AttributeTypeDescription
view.time_spentnumber (ns)Time spent on the current view.
view.first_bytenumber (ns)Time elapsed until the first byte of the view has been received.
view.largest_contentful_paintnumber (ns)Time in the page load where the largest DOM object in the viewport (visible on screen) is rendered.
view.first_input_delaynumber (ns)Time elapsed between a user’s first interaction with the page and the browser’s response.
view.cumulative_layout_shiftnumberQuantifies unexpected page movement due to dynamically loaded content (for example, third-party ads) where 0 means that no shifts are happening.
view.loading_timenumber (ns)Time until the page is ready and no network request or DOM mutation is currently occurring. More info from Monitoring Page Performance.
view.first_contentful_paintnumber (ns)Time when the browser first renders any text, image (including background images), non-white canvas, or SVG. For more information about browser rendering, see the w3c definition.
view.dom_interactivenumber (ns)Time until the parser finishes its work on the main document. More info from the MDN documentation.
view.dom_content_loadednumber (ns)Time until the load event is fired and the initial HTML document is completely loaded and parsed, without waiting for non-render blocking stylesheets, images, and subframes to finish loading. More info from the MDN documentation.
view.dom_completenumber (ns)Time until the page and all of the subresources are ready. The loading spinner has stopped spinning for the user. More info from the MDN documentation.
view.load_eventnumber (ns)Time until the load event is fired, indicating the page is fully loaded. Usually a trigger for additional application logic. More info from the MDN documentation.
view.error.countnumberCount of all errors collected for this view.
view.long_task.countnumberCount of all long tasks collected for this view.
view.resource.countnumberCount of all resources collected for this view.
view.action.countnumberCount of all actions collected for this view.

Resource timing metrics

Detailed network timing data for the loading of an application’s resources are collected with the Performance Resource Timing API.

MetricTypeDescription
durationnumberEntire time spent loading the resource.
resource.sizenumber (bytes)Resource size.
resource.connect.durationnumber (ns)Time spent establishing a connection to the server (connectEnd - connectStart).
resource.ssl.durationnumber (ns)Time spent for the TLS handshake. If the last request is not over HTTPS, this metric does not appear (connectEnd - secureConnectionStart).
resource.dns.durationnumber (ns)Time spent resolving the DNS name of the last request (domainLookupEnd - domainLookupStart).
resource.redirect.durationnumber (ns)Time spent on subsequent HTTP requests (redirectEnd - redirectStart).
resource.first_byte.durationnumber (ns)Time spent waiting for the first byte of response to be received (responseStart - RequestStart).
resource.download.durationnumber (ns)Time spent downloading the response (responseEnd - responseStart).

Resource attributes

AttributeTypeDescription
resource.typestringThe type of resource being collected (for example, css, javascript, media, XHR, or image).
resource.methodstringThe HTTP method (for example POST or GET).
resource.status_codenumberThe response status code.
resource.urlstringThe resource URL.
resource.url_hoststringThe host part of the URL.
resource.url_pathstringThe path part of the URL.
resource.url_queryobjectThe query string parts of the URL decomposed as query params key/value attributes.
resource.url_schemestringThe protocol name of the URL (HTTP or HTTPS).
resource.provider.namestringThe resource provider name. Default is unknown.
resource.provider.domainstringThe resource provider domain.
resource.provider.typestringThe resource provider type (for example, first-party, cdn, ad, or analytics).

Long task timing metrics

MetricTypeDescription
long_task.durationnumberDuration of the long task.

Error attributes

AttributeTypeDescription
error.sourcestringWhere the error originates from (for example, console or network).
error.typestringThe error type (or error code in some cases).
error.messagestringA concise, human-readable, one-line message explaining the event.
error.stackstringThe stack trace or complementary information about the error.

Source errors

Source errors include code-level information about the error. For more information about different error types, see the MDN documentation.

AttributeTypeDescription
error.typestringThe error type (or error code in some cases).

Action timing metrics

MetricTypeDescription
action.loading_timenumber (ns)The loading time of the action. See how it is calculated in the User Action documentation.
action.long_task.countnumberCount of all long tasks collected for this action.
action.resource.countnumberCount of all resources collected for this action.
action.error.countnumberCount of all errors collected for this action.

Action attributes

AttributeTypeDescription
action.idstringUUID of the user action.
action.typestringType of the user action. For Custom User Actions, it is set to custom.
action.target.namestringElement that the user interacted with. Only for automatically collected actions.
action.namestringUser-friendly name created (for example, Click on #checkout). For Custom User Actions, the action name given in the API call.

Frustration signals fields

FieldTypeDescription
session.frustration.countnumberCount of all frustration signals associated with one session.
view.frustration.countnumberCount of all frustration signals associated with one view.
action.frustration.type:dead_clickstringThe dead clicks detected by the RUM Browser SDK.
action.frustration.type:rage_clickstringThe rage clicks detected by the RUM Browser SDK.
action.frustration.type:error_clickstringThe error clicks detected by the RUM Browser SDK.

Further Reading