A glossary of common terminology you may encounter as a New Relic user.

account dropdown

New Relic account dropdownAfter you sign in to the New Relic UI, your account name appears on the right of the New Relic menu bar. To use available account functions, such as changing your password or other user preferences, selecting a different New Relic account, or logging out, select the dropdown.

Depending on your role, from the account dropdown you may also view or change other account settings, such as account users, subscription and pricing levels, credit card and other billing information, account usage, etc.


A user role that can access all features of New Relic except billing information. Administrators manage New Relic account settings, including API access, integrations, and other users. Admins can also enable and configure features, and delete data.

For more information, see Users and roles.


The monitoring software New Relic users run on their app servers or inside their mobile apps. The agent monitors local transactions and host information. The agent then caches this data and reports it to the New Relic collector once each harvest cycle.

The form of the agent software for New Relic APM varies:

agent API

The New Relic agent API allows you to extend New Relic's functionality. You can use the API to control, customize and extend the functionality of the New Relic agent.

For more information, see the agent-specific API documentation:

APM agents:

Mobile agents:

aggregated metrics

Aggregated metric data summarizes calls to specific methods in your application, including how many times each one was called and response times. In the New Relic UI, you see the class and method names along with their aggregate numbers. Metric data aggregation depends on the New Relic product and your subscription level. For more information, see New Relic's documentation about data retention.


An alert communicates an event or incident that designated personnel can track through New Relic Alerts.

For an explanation of how basic Alerts concepts are related, see Alerts concepts and workflow.

alert condition

An alert condition, identified by its unique numeric condition_id, contains the criteria for Alerts to create a violation. The condition includes the threshold that is set for a metric timeslice or a custom metric over time on a chosen target.

For an explanation of how an alert condition relates to other basic Alerts concepts, see Concepts and workflow.

alert policy

A collection of one or more alert conditions, one or more notification channels, and an Incident preference setting.

If a condition contained within the policy opens a violation, an incident may be opened depending on the Incident preference setting. Notifications will then be sent to all channels attached to the policy.

For an explanation of how an alert policy relates to other basic Alerts concepts, see Concepts and workflow.


Apdex is an industry-standard way to measure users' satisfaction with the response time of an application or service. New Relic rates each response as Satisfied, Tolerated, or Frustrated, and uses these ratings to calculate an overall user satisfaction score.

For more information, see Apdex: Measure user satisfaction.


The response time above which a transaction are rated frustrating. Defaults to four times apdex_t.

  • Requests that complete in less than apdex_t are rated satisfied.
  • Requests that take longer than apdex_t, but less than four times apdex_t (apdex_f), are tolerated.
  • Any requests that take longer than apdex_f are rated frustrating.

For more information, see Apdex: Measure user satisfaction.


The response time above which a transaction is considered tolerable. The default value is 0.5 seconds, but you can change this in your Apdex settings.

  • Requests that complete in less than apdex_t are rated satisfied.
  • Requests that take more than apdex_t, but less than apdex_f, are tolerated.
  • Any requests that take longer than apdex_f are rated frustrating.

For more information, see Apdex: Measure user satisfaction.

API (application programming interface)

New Relic offers a variety of APIs and SDKs. For more information, see the introduction to New Relic's APIs.


For New Relic purposes, any program instrumented by New Relic.

application ID

Each app instrumented by New Relic is assigned an application ID, often abbreviated to app ID. This ID is used to uniquely identify it, and to retrieve data about that app via the REST API. When you view your app in the New Relic UI, the ID is included in the URL:

For more information, see Listing your app ID. You can also use the API Explorer to view your app ID.

application name

The name that New Relic combines with your license key to uniquely identify a particular app. For more information, see Name your application.


Attributes are key-value pairs attached to data objects reported to New Relic. Their purpose is to provide detail about that data type. Examples:

  • New Relic APM reports a Transaction event. This includes timing data for the transaction in a duration attribute, which might have a value of .002.
  • New Relic Infrastructure reports a ProcessSample event. This includes a variety of CPU usage attributes, including a cpuSystemPercent attribute, which might have a value of .01.
  • The New Relic Telemetry SDK reports a Metric data type for storing metrics, with attached attributes like metricName and newrelic.source.

You can explore this data by querying or searching via the UI or by using the data dictionary.

Some products and subscription levels allow you to collect custom attributes to enhance your monitoring.

For more information about attributes in New Relic APM, see Agent attributes.

availability monitoring

See Types of Synthetics monitors.


New Relic's user interface supports most browsers. For more information, see Supported browsers.

For New Relic's end-user browser monitoring product, see New Relic Browser.

background external

See web external.

cloud-based integration

New Relic Infrastructure integrations allow you to send data from your services or systems to New Relic products. New Relic offers cloud-based integrations with providers such as Amazon Web Services (AWS) and Microsoft Azure. New Relic Infrastructure also offers on-host integrations.


The component of New Relic that collects data from New Relic agents running on an app server, mobile device, or end-user browser. While the agent is installed on a user's app server, the collectors are centrally located in New Relic's data center.

In order to contact the collector, the agent must be able to reach New Relic's domains and IP addresses. (The exact domain or IP depends on the New Relic product.) The collector receives and interprets this data, and stores it in a database. The data is then retrieved and presented in the New Relic UI and by New Relic's various REST APIs.

compute unit (CU)

A unit of measurement that determines your pricing for some New Relic products. For more information, see Compute unit pricing.


See alert condition.

CPM (calls per minute)

The number of calls your application receives each minute. This usually corresponds to the number of page views or external connections, and is usually the same as RPM (requests per minute).

CPU burn

The time consumed by code minus the wait time for a transaction. This is the time actually spent processing the transaction. It appears in the New Relic UI at the top of the transaction view for the agents that provide it (Ruby and PHP only).

custom attribute

A key-value pair added to a transaction or event in order to gain additional information about it. For more information, see custom attributes.

custom dashboard

A customizable dashboard with charts and tables that includes data from multiple New Relic data sources. For more information, see New Relic One dashboards or New Relic Insights dashboards.

custom event

An event, in New Relic terms, is a data object with attached attributes. New Relic reports default event types, like Transaction and TransactionError. You can also create your own events. Events can be queried in New Relic products, and are used in many other New Relic features.

You can generate custom events with APM agents with the Browser agent, with the Mobile agent, and via the Event API. Alternatively, you can add custom attributes to some existing default New Relic events.

custom instrumentation

Custom instrumentation allows you to extend New Relic's monitoring to instrument code elements New Relic doesn't automatically instrument. Custom instrumentation is useful when your framework is not supported by New Relic, or when New Relic fails to pick up some element of your program. You can also use custom instrumentation to block a transaction from being reported entirely. For more information, see Custom instrumentation.

custom metric

Metric timeslice data that is manually recorded via an API call. Custom metrics allow you to record arbitrary metrics; for example, timing or computer resource data. All custom metric names must be prefixed with Custom/. For more information, see Custom metrics.

Not to be confused with custom instrumentation data.

data collector

See collector.

dimensional metric

A dimensional metric is a metric that has multiple attributes, also known as dimensions. At New Relic, we reported dimensional metrics using the Metric data type. For more on other metric data types, see Metric data.


An open platform for distributed applications, which allows you to assemble multi-container portable apps. New Relic Infrastructure includes integrated Docker monitoring. For more information about Docker, see the Docker website.


The period of time when customers cannot access your site and your app is not reporting to New Relic. For more information, see New Relic Synthetics and Types of Synthetics monitors.


In New Relic, an entity is anything we can identify that has data you can monitor. An entity can be something you monitor directly, like applications and microservices, or indirectly, like data centers.

You can identify one or more entities to be targets for alert conditions. In the Alerts API, the entity being monitored is identified with an entity_id.


The word event is a general term that can have many meanings.

At New Relic, event can have several meanings:

  • At New Relic, event data is one of the core data types reported by New Relic. Event data represents a record of a single event at a particular moment in time. Events can vary by type (for example, Transaction or Mobile, and will have associated attributes (for example, timestamp or transactionName). For more details, see Event data.
  • For New Relic Infrastructure, the word event can be used to refer to important system and host activity. For example, a configuration change for a monitored host would be registered on Infrastructure's Events UI page.
  • In New Relic Alerts, the Events UI page displays a list of alert-related incidents for your monitored entities. Events are reported for a violation opening and for closing.
  • In some contexts, event can refer to any NRQL-queryable data type. For example, when you run a NRQL query, you will see a count of inspected events: this refers to a count of all data types queried.
expected error

An expected error is a common error that you don't want to affect your Apdex score or error rate. For more information, see Manage errors in APM.


At New Relic, an exporter is a type of integration that reports telemetry data to New Relic from a third-party (non-New Relic) telemetry tool. For examples, see Exporters, or search our integrations.


New Relic Flex is an application-agnostic, all-in-one integration. It can collect metric data from a wide variety of services, and can instrument any app that exposes metrics over a standard protocol (HTTP, file, shell) in a standard format (for example, JSON or plain text): to the terminal.

It is the preferred way for creating new integrations, since it doesn't require coding skills.


A framework is a structured collection of pre-defined functions, into which an application builder inserts their own code to build their application. A framework is not the same as a library. While a library is a collection of functions you can call as needed, a framework is a skeleton for your application. The functions in that framework then call your functions. For more about the distinction between a framework and a library, see What is the difference between a framework and a library? .

New Relic automatically instruments many common frameworks. For more about the frameworks New Relic supports, see the agent-specific documentation:

harvest cycle

The period of time between each connection from a New Relic agent to the collector. Between harvest cycles, an agent collects and caches data. At the end of the cycle an agent reports those data to the collector, then begins a new harvest cycle.

health status indicator

Some New Relic products have a health status indicator appearing next to an index of monitored entities. This is a colored bar (generally green, yellow, red, or gray) indicating the status of your app or other entity monitored by New Relic. It also indicates whether the entity has any alert policies assigned to it with New Relic Alerts and whether there are any policy violations.

In general, the colored bar will be green, yellow, red, or gray to indicate the health status. Exceptions:


At New Relic, a host means one of the following:

  • A physical machine is a hardware-based device with dedicated physical resources, including memory, processing, and storage. Each machine has its own OS which applications run on.
  • A virtual machine (VM) is the software implementation of a physical machine that executes programs like a physical machine. One or more virtual machines can run on a physical machine. Each virtual machine has its own OS and allocated virtual machine resources such as RAM and CPU.
  • A cloud instance is a type of virtual machine that is run in the public cloud. In this context, virtual machines and cloud instances are different from Java Virtual Machines (JVMs) and containers.
host ID

Each host identified by New Relic APM is assigned a host ID. This ID is used to uniquely identify it, and to retrieve data about that host via the REST API. For more information, see List host ID.

ignored error

An error that you have told the New Relic APM agent not to report to the collector. For more information, see Manage errors in APM.


An incident is a collection of one or more violations of the conditions defined in an alert policy. An incident record includes all of the open and close time stamps for each violation, as well as chart snapshots of the data being evaluated around the time of each violation.

You can view detailed information from the Incidents pages in the Alerts user interface. You can also select your preference for how we roll up violations into the incident.

For an explanation of how an incident relates to other basic Alerts concepts, see Concepts and workflow.

instance ID

Each instance identified by New Relic is assigned a unique instance ID. Instance IDs are most commonly found for JVMs (Java Virtual Machines), but can exist for each agent. This ID is used to uniquely identify it, and to retrieve data about that instance via the REST API. For more information, see List instance IDs.


The collection of data from an application or host. When New Relic instruments a framework, it detects the methods and calls used by that framework, and intelligently groups them together.


At New Relic, an integration is a solution we offer for reporting data. See our integrations.


In New Relic Mobile, an interaction is a specific code path initiated by a user interaction (usually a button press). An interaction is the mobile equivalent of a transaction, and like a transaction an interaction can be traced and monitored.

interaction trace

An interaction trace is a complete picture of a single interaction. With interaction traces, New Relic gives you much deeper visibility into a single slow interaction, which can help you understand a broader problem. Interaction traces are the mobile equivalent of a transaction trace. For more information, see Creating interactions (iOS) and Creating interactions (Android).

inventory data

Inventory data is information about the status or configuration of a service or host. Examples of inventory data include:

  • Configuration settings
  • Name of the host the service is on
  • Amazon AWS region
  • Port being used

For more information, see Understand and use data.

key transaction

A web transaction that the user has marked as particularly important; for example, key business events (such as signups or purchase confirmations), or transactions with a high performance impact (such as searches). Key transactions have their own pages in the New Relic UI and other customized values. For more information, see Key transactions.

master account

A master account is a New Relic account with related subordinate accounts, called sub-accounts. This is useful, for example, to limit users so they can view specific applications and not others.

The option to create master and sub-accounts depends on your New Relic subscription level. For more information, see Creating sub-accounts.


A metric is a numeric measurement. Metric data is a broad category because there are several ways to make and report measurements. For more about how metrics are reported at New Relic, see New Relic data types.

metric timeslice

A metric timeslice is a type of metric data reported by New Relic APM, Browser, and Mobile. It has a simple data structure consisting of three parts: a metric name, associated numeric values, and a segment of time (a "timeslice") associated with those data points. Over time, it is aggregated into larger time windows for easier storage. For more details, see Metric timeslice data.

metric grouping issue

A metric grouping issue occurs when an account sends too many differently named metric timeslice data points to New Relic, and those individual web transactions are not properly aggregated. For example, rather than a single /user/controlpanel/ metric name, you might see /user/controlpanel/alice, /user/controlpanel/bob, and /user/controlpanel/carol. For more information, see Metric grouping issues.


The software that accepts monitor jobs from a private location. A minion is a packaged virtual appliance that runs in your hypervisor. For more information, see Private locations overview and install and configure private minions.


In New Relic Synthetics, a monitor ensures your website or API endpoint is available. For more information, see Adding and editing monitors.

New Relic APM

New Relic APM (Application Performance Monitoring) provides monitoring of your web or non-web application's performance. New Relic APM supports apps using several programming languages.

New Relic Browser

New Relic Browser allows you to monitor browser-side code performance. New Relic Browser includes standard page load timing, which measures the overall time to load an entire web page. New Relic also goes beyond timing, by monitoring AJAX request performance and JavaScript errors.

New Relic Infrastructure

By connecting changes in host performance to changes in your configuration, New Relic Infrastructure provides real-time metrics and powerful analytics that reduce your mean-time-to-resolution (MTTR). Hosts are automatically added and removed from the Infrastructure interface as they are created and destroyed, and a powerful UI lets you see every change and make intelligent business decisions about your environment.

Infrastructure is specifically designed for complex environments that need flexible, dynamic server monitoring, from a physical datacenter to thousands of Amazon Elastic Compute Cloud (Amazon EC2) instances and other types of integrations.

New Relic Insights

New Relic Insights is one way to query and chart your New Relic-reported data. It's a software analytics tool to gather and visualize data from your software, and query that data in real-time.

New Relic Logs

New Relic Logs offers scalable log management platform that allows you to connect your log data with the rest of your telemetry data. Pre-built plugins with some of the most common open-source logging tools make it simple to send your data from anywhere to New Relic.

New Relic Mobile

New Relic Mobile allows you to monitor and manage the performance of your mobile apps on Android, iOS, tvOS, and other systems, such as React Native. New Relic Mobile provides end-to-end details, including crashes, throughput, HTTP requests, error traces, and more.

Not to be confused with New Relic's own mobile apps for Android, iPhone and iPad, and Insights.

New Relic One

New Relic One is an interface that lets you view data from multiple New Relic products and your related accounts, all in one place. New Relic One is not a product; it's a way to view and use your New Relic data more easily. You can find it at

For more information, see Introduction to New Relic One.

New Relic Plugins

New Relic Plugins provides an open platform to monitor critical information about your entire stack. New Relic partners, PaAS and SaAS providers, third-party vendors, and plugin users can:

  • Quickly install and use publicly available plugins in Plugin Central.
  • Develop your own plugin agents to collect the metric data that matters most to your business.
  • Publish your plugins for public or private access.
New Relic Synthetics

New Relic Synthetics allows you to monitor your website or API endpoint via automated, scriptable tools. Use free ping monitor to ensure your website is accessible, or expand your monitoring with browser monitors, which test your website with real browsers. Go further with scripting, to script browsers or API monitors for sophisticated testing.

NRQL (New Relic Query Language)

NRQL is a query language similar to SQL that allows you to make calls against the New Relic database. Use NRQL to make real-time queries to your New Relic data and to refine your queries to get the data you want.

non-web transaction

New Relic APM identifies transactions as either web or non-web. When New Relic does not detect a transaction was initiated by a web request, this is called a non-web transaction. For more information, see New Relic's documentation about background processes and other non-web transactions.


The message sent when an incident opens, is acknowledged, or closes. The type of notification is defined by the alert policy's notification channel.

For an explanation of how notifications relate to other basic Alerts concepts, see Concepts and workflow.

notification channel

Where we send a notification when an incident opens, is acknowledged, or closes. Available channels include email, mobile push notifications, webhooks, and more.

on-host integration

New Relic Infrastructure integrations allow you to send data from your services or systems to New Relic products. On-host integrations refer to integrations with New Relic Infrastructure that are not cloud-based. Instead, they reside on your own servers or hosts. For more information, see Introduction to on-host integrations.


The user role that initially creates the New Relic account. The owner has complete access to all account information, including billing information. Owners receive all billing queries. Owners can manage all New Relic account settings, including API access, integrations, and other users. Owners can also enable and configure features, and delete data.

For more information, see Users and roles.

page load timing

With page load timing, New Relic monitors the full load time for end-user browsers. New Relic's application agents dynamically inject JavaScript into the page, then capture the following key load points:

  • Navigation start: The user initiates the transaction.
  • First byte: The browser receives the requested page.
  • DOM ready: The browser has finished parsing DOM.
  • Page ready: Page loading is complete.

Page load timing is sometimes referred to as RUM, or real user monitoring. Unlike standard RUM, page load timing also captures JavaScript errors and AJAX requests. For more information, see Page load timing process.


Deprecated term; see attribute.

A unique URL that links to a view of your application at a specific point in time. Permalinks are useful for troubleshooting and for sharing interesting time windows with colleagues. For more information, see Permalink.


The component of New Relic that connects to your website to verify your website is accessible. New Relic has pingers in Europe, Asia, and the United States. Each pinger attempts to contact your website at least once every two minutes. If enough pingers are unable to reach your website, your application will be considered down.

For in-depth scriptable testing, including real browser tests and tests of API endpoints, see New Relic Synthetics. Synthetics includes free ping monitoring, which allows you to monitor your website from locations around the world. For more information, see Types of Synthetics monitors.

polling interval (AWS)

New Relic Infrastructure Amazon integrations query your AWS services according to a polling interval, which varies depending on the integration. Each polling interval by New Relic occurs for every AWS entity. For example, if you have thirteen Elastic Load Balancers (ELB), each one will be polled every five minutes.

Depending on the AWS integration, New Relic Infrastructure may experience delays in the timing between the API request and the metric data returned. If you notice unusual delays, follow the integration troubleshooting procedures.

PPM (pages per minute)

The number of pages per minute your application serves.

private location

A New Relic Synthetics feature that allows you to run Synthetics monitors from within your own systems by creating private minions. Private locations allow you to extend your New Relic Synthetics coverage to new geographical locations, and to monitor websites behind your firewall such as an intranet site. For more information, see Private locations overview.

React Native

New Relic Mobile's flexible and extensible agent, which extends from iOS and Android to React Native. This helps to keep your iOS and Android apps looking and functioning the same way. For more information, see Introduction to Mobile React Native and Introduction to mobile development tools.

response time

The duration of time between a request for service and a response. For more information, see Response time.

restricted user

A user role that can view (but not set up or change) New Relic features. The restricted user role is useful for demos or kiosks.

For more information, see Users and roles.


Using the same application name for multiple applications. This allows you to combine data in APM, either from multiple applications, or from multiple instances of an application. For more information, see Rolling up app data.

root span

For distributed tracing, the root span is the first span in a trace. In many cases, the root span duration will represent the duration of the entire trace, or be very close to it.

However, for more complex, modern systems that use a lot of asynchronous, non-blocking processes, this will not be true. For those systems, the root span’s duration may be significantly less than the duration of the trace.


The term RPM usually refers to the number of requests per minute your application receives from users. This is usually the same as CPM (calls per minute).

For some New Relic products like APM and Browser, RPM is also part of the product URL; for example, This usage originally referred to Rails performance management because the first New Relic agent monitored Ruby on Rails applications. New Relic monitors many languages and systems far beyond Ruby now.

RUM (real user monitoring)

See page load timing.


A runbook contains standard procedures and operations typically used by system administrators, network operations staff, and other personnel to handle outages, alert incidents, and other situations. If your organization stores runbook instructions as URLs, you can link this information to New Relic Alerts so your personnel has easy access to this information when an alert incident violates the defined policy thresholds.

SAML (Security Assertion Markup Language)

SAML is an XML-based data format for sharing authentication data between two parties. SAML creates end points that give an organization's users a single sign on (SSO) URL. Once logged in, users can select any applications they are authorized to use. This provides an additional level of security and simplifies user authentication. In New Relic, owners must obtain a SAML certificate in order to enable Single Sign On. For more information, see SAML service providers.


Selenium is an open-source browser testing suite. Synthetics uses Selenium to test monitored websites with real browsers. For more information, see monitor types.


In a distributed trace, a span is a "named, timed operation representing a contiguous segment of work in that trace" (from definition).

For New Relic's distributed tracing feature, spans are displayed in the distributed tracing UI, and the data type Span is available to be queried.

See also root span.

SSL certificate

SSL certificates encrypt data that is being transmitted. While New Relic refers to security certificates as SSL because it is a more commonly used term, all certificates adhere to industry standards for secure encryption in transit.

SSO (single sign on)

SSO (single sign on) allows you to manage user authentication in New Relic using an external SSO provider. This allows your users to login at one place for multiple applications (for instance, Slack, Gmail, and New Relic). SSO provides an additional level of security and simplifies user authentication. Enabling SSO requires SAML. For more information, see Setting up SSO.


See master account.


A target is a resource or component monitored by a New Relic product that has been identified in an alert condition. When the data source for that target crosses the defined Critical threshold, we will open a violation. Depending on your policy's Incident preference setting, Alerts may create an incident record and send notifications through the defined channels. See also entity.


Thresholds refer to the alert condition settings that define what is considered a violation. Threshold values include the value that a data source must pass to trigger a violation and the time-related settings that define a violation; for example:

  • Passing a certain value for at least x minutes
  • Passing a certain value only once in x minutes

Thresholds have a required critical (red) threshold and an optional warning (yellow) threshold. In the UI, the entity's health status indicator will change to yellow or red when a threshold has been crossed, and a violation will open.

For more information, see Define thresholds. For an explanation of how thresholds relate to other basic Alerts concepts, see Concepts and workflow.


Throughput is a measurement of user activity for a monitored application. New Relic APM throughput and New Relic Browser throughput are measured in different ways:

  • APM: requests per minute (RPM)
  • Browser: page views per minute (PPM)

A tier represents how New Relic categorizes or visualizes the various agent language ecosystems that we support. For example:

  • In New Relic APM, the color-coded categories that appear on your app's main Overview chart show response time spent in various functions, processes, or agents as tiers; for example, request queuing, garbage collection, Middleware, JVMs, etc.
  • In New Relic labels, TIER can be used to define or classify the client-server architecture; for example, front-end and back-end tiers.
time picker

By default the New Relic UI shows data for the past 30 minutes, ending now. To change the time window, use the time picker.

time range or timeslice

A time-unit division of metric timeslice data, as displayed in the UI or extracted via the REST API. The time range has "resolution," which corresponds to the steps shown in a chart. For example, when viewing a half-hour time window, New Relic will display the data in minute increments. New Relic displays the time range appropriate for the period you select in the time picker.

For more information, see Extracting metric data.

timeslice data

The New Relic collector records timeslice data once a minute. Over time, this data is aggregated into longer timeslice data records for more efficient storage. Data is initially aggregated into hourly values, then into daily values. For more information about how New Relic aggregates data, see Data aggregation.

traffic light

See health status.


A transaction is defined as one logical unit of work in an application. This term primarily refers to server-side transactions monitored by New Relic APM. For more information, see New Relic's documentation about web transactions and non-web transactions.

The term transaction is also sometimes used in New Relic Browser. For Browser, it primarily refers to activity beginning with a browser-side web request and ending with a complete page load.

transaction trace

A transaction trace is a complete picture of a single transaction, down to the database queries and exact invocation patterns. With transaction traces, New Relic gives you much deeper visibility into a single slow transaction, which can help you understand a broader problem. For more information, see Transaction traces.


The New Relic user interface. For more information, see Standard page functions.


A user role that can add, edit, and use New Relic features. Users manage the app's performance, but cannot access account or billing information.

Typically, this role is appropriate for a developer or operations person. For more information, see Users and roles.


Universal Time Coordinated (UTC), or Coordinated Universal Time, is a standard timestamp for synchronizing time around the world. With New Relic Alerts, you can view data as UTC, or you can switch to your time zone (defined from accounts > User preferences). You can also offset UTC when using the New Relic REST API (v2).

value function (metrics)

The numeric value obtained from metric timeslice data; for example, an average, minimum, maximum, total, sample size, etc.


A violation occurs when the entity monitored by an alert condition reports a value that crosses the thresholds defined in that condition. For an explanation of how violations relate to other basic Alerts concepts, see Concepts and workflow.

You can view a summary of the violations for a selected incident's page. You can also view the violations for a specific entity from the product's UI.

web external

Web external is the term applied to the portion of time spent in transactions to external applications from within the code of the application you are monitoring. That time can be a call to a third party company (a payment provider, for example) or it could be a call to another microservice within your own company. Web external demonstrates how performance is impacted by your code executing outside the application you are measuring.

web transaction

A transaction is defined as one logical unit of work in an application. This term primarily refers to server-side transactions monitored by New Relic APM.

Web transactions are initiated with an HTTP request. For most organizations, these represent customer-centric interactions and thus are the most important transactions to monitor. For more information, see New Relic's documentation about web transactions and non-web transactions.


WebDriver is a Selenium component, used to control Synthetics scripted browsers. Specifically, Synthetics uses WebDriverJS, a Node.js-based flavor of Selenium. For more information, see Writing scripted browsers and Scripted browser examples.


A workload represents a group of entities that work together to provide a digital service. For more information, see Workloads.

For more help

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