Configuration options

The name to identify this service in Elastic APM. Multiple instances of the same service should use the same name. Allowed characters: a-z, A-Z, 0-9, -, _, and space.

If serviceName is not provided, the agent will attempt to use the "name" field from "package.json" — looking up from the current working directory. The name will be normalized to the allowed characters. If the name cannot be inferred from package.json, then a fallback value of "unknown-nodejs-service" is used.

A unique name for the service node. This is optional, and if omitted, the APM Server will fall back on system.container.id if available, and finally host.name if necessary.

This option allows you to set the node name manually to ensure uniqueness and meaningfulness.

The secret token optionally expected by the APM Server.

The API key optionally expected by the APM Server. This is an alternative to secretToken.

This base64-encoded string is used to ensure that only your agents can send data to your APM server. You must have created the API key using the APM server command line tool. Please see the APM server documentation for details on how to do that.

The URL to where the APM Server is deployed.

By default the agent will validate the TLS/SSL certificate of the APM Server if using HTTPS. You can switch this behavior off by setting this option to false.

By default the agent will validate the TLS/SSL certificate of the APM Server using the well-known CAs curated by Mozilla, as described in the Node.js docs for tls.createSecureContext(). You can set this option to the path of a file containing a CA certificate that will be used instead.

Specifying this option is required when using self-signed certificates, unless server certificate validation is disabled.

The version of the app currently running. This could be the version from your package.json file, a git commit reference, or any other string that might help you pinpoint a specific version or deployment.

A boolean specifying if the agent should be active or not. If active, the agent will instrument incoming HTTP requests and track errors. Normally you would not want to run the agent in your development or testing environments. If you are using the NODE_ENV environment variable, you can use this to determine the state:

var options = {
  active: process.env.NODE_ENV === 'production'
}

The environment name is automatically logged along with all errors and transactions. If you want to overwrite this, use this option.

Environments allow you to easily filter data on a global level in the APM app. It’s important to be consistent when naming environments across agents. See environment selector in the APM app for more information.

If set to true, the agent will reduce its work to the minimum required to support automatic HTTP trace-context propagation (for distributed tracing) and log correlation. The agent will not communicate with APM server (no tracing data is forwarded, no central configuration is retrieved) and will not collect metrics. This setting allows using the APM agent with a service that cannot use APM server. Usage is expected to be rare.

If set to true, the agent will work as usual, except that it will not attempt to communicate with APM server. Tracing and metrics data will be dropped and the agent won’t be able to receive central configuration, which means that any other configuration cannot be changed in this state without restarting the service.

This setting is similar to contextPropagationOnly in functionality. However, disableSend does not attempt to reduce time spent collecting tracing data. A use case for this setting is in CI environments, to test agent functionality without requiring a configured APM server.

A boolean specifying if the agent should automatically apply instrumentation to supported modules when they are loaded.

Note that both active and instrument needs to be true for instrumentation to be running.

A boolean specifying if the agent should instrument incoming HTTP requests.

To configure if outgoing http requests should be instrumented, see disableInstrumentations.

Activate APM Agent Configuration via Kibana. If set to true, the client will poll the APM Server regularly for new agent configuration.

Added in: v3.37.0
The "patch" context manager was removed in: v4.0.0

This configuration option provides a way to override the APM agent’s default technique for tracking Node.js asynchronous tasks; sometimes referred to as "run context", "async context", or just "context". Most users should not need to change this setting. This setting replaces the older asyncHooks configuration option.

To effectively trace an application, the APM agent needs to track the logical thread of control through asynchronous tasks. The preferred mechanism for this is AsyncLocalStorage, usable in Node.js versions >=14.5 and >=12.19. In older versions of Node, the APM agent will fallback to using async_hooks, which can have a higher performance overhead, especially in Promise-heavy applications.

Supported values for contextManager are:

Array or comma-separated string used to restrict requests for certain URLs from being instrumented.

When an incoming HTTP request is detected, its URL pathname will be tested against each string in this list. The transactionIgnoreUrls property supports exact string matches, simple wildcard (*) matches, and may not include commas. Wildcard matches are case-insensitive by default. You may make wildcard searches case-sensitive by using the (?-i) prefix.

Note that all errors that are captured during a request to an ignored URL are still sent to the APM Server regardless of this setting.

If you need full regular expression pattern matching, see ignoreUrls.

Example usage:

require('elastic-apm-node').start({
  transactionIgnoreUrls: [
    '/ping',
    '/fetch/*',
    '(?-i)/caseSensitiveSearch'
  ]
})

Used to restrict requests to certain URLs from being instrumented.

This property should be set to an array containing one or more strings or RegExp objects. When an incoming HTTP request is detected, its URL will be tested against each element in this list. If an element in the array is a String, an exact match will be performed. If an element in the array is a RegExp object, its test function will be called with the URL being tested.

Note that all errors that are captured during a request to an ignored URL are still sent to the APM Server regardless of this setting.

If you’d prefer simple wildcard pattern matching, see transactionIgnoreUrls.

Example usage:

require('elastic-apm-node').start({
  ignoreUrls: [
    '/ping',
    /^\/admin\//i
  ]
})

Used to restrict requests from certain User-Agents from being instrumented.

This property should be set to an array containing one or more strings or RegExp objects. When an incoming HTTP request is detected, the User-Agent from the request headers will be tested against each element in this list. If an element in the array is a String, it’s matched against the beginning of the User-Agent. If an element in the array is a RegExp object, its test function will be called with the User-Agent string being tested.

Note that all errors that are captured during a request by an ignored user agent are still sent to the APM Server regardless of this setting.

Example usage:

require('elastic-apm-node').start({
  ignoreUserAgents: [
    'curl/',
    /pingdom/i
  ]
})

The HTTP body of incoming HTTP requests is not recorded and sent to the APM Server by default.

Possible options are: off, all, errors, and transactions.

The recorded body will be truncated if larger than 2 KiB.

If the body parsing middleware captures the body as raw Buffer data, the request body will be represented as the string "<Buffer>".

For the agent to be able to access the body, the body needs to be available as a property on the incoming HTTP request object. The agent will look for the body on the following properties: req.json || req.body || req.payload

The HTTP headers of incoming HTTP requests, and its resulting response headers, are recorded and sent to the APM Server by default. This can be disabled by setting this option to false.

A boolean specifying if the agent should monitor for aborted TCP connections with un-ended HTTP requests. An error will be generated and sent to the APM Server if this happens.

Specify the threshold for when an aborted TCP connection with an un-ended HTTP request is considered an error. The value is expected to be in seconds, or should include a time suffix.

If the errorOnAbortedRequests property is false, this property is ignored.

Specify the sampling rate to use when deciding whether to trace a request.

This must be a value between 0.0 and 1.0, where 1.0 means 100% of requests are traced. The value is rounded to four decimal places of precision (e.g. 0.0001, 0.3333) to ensure consistency and reasonable size when propagating the sampling rate in the tracestate header for distributed tracing.

The OS hostname is automatically logged along with all errors and transactions. If you want to overwrite this, use this option.

Set the name of the web framework used by the instrumented service/application. The name will be available as metadata for all errors and transactions sent to the APM Server. This can be useful for debugging and filtering.

By default, the agent will set the value of this config option if the framework can be detected automatically.

Set the version of the web framework used by the instrumented service/application. The version will be available as metadata for all errors and transactions sent to the APM Server. This can be useful for debugging and filtering.

By default, the agent will set the value of this config option if the framework can be detected automatically.

Example of setting frameworkName and frameworkVersion for a framework named my-custom-framework:

// read the version from the package.json file
var frameworkVersion = require('my-custom-framework/package').version

require('elastic-apm-node').start({
  frameworkName: 'my-custom-framework',
  frameworkVersion: frameworkVersion
})

Set the verbosity level for the agent’s logging. Note that this does not have any influence on the types of errors that are sent to the APM Server. This only controls how chatty the agent is in your logs. Possible levels are: trace (the most verbose logging, avoid in production), debug, info, warning, error, critical, and off (disable all logging).

This config only applies when using the built-in logger. Log levels will not be automatically applied to a custom logger.

By default, the APM agent logs to stdout in ecs-logging format. Use the logger config to pass in a custom logger object. The custom logger must provide trace, debug, info, warn, error, and fatal methods that take a string message argument.

A custom logger may result in structured log data being lost. As of version 3.13, the agent uses structured logging using the pino API. To avoid issues with incompatible logger APIs, a given custom logger is wrapped in such a way that only the log message is passed through. As a special case, if the provided logger is a pino logger instance, then it will be used directly without loss of structured fields. Setting the environment variable ELASTIC_APM_LOGGER=false will ignore a custom logger. This is provided to assist with Debug mode troubleshooting.

An example using a custom pino logger:

const pino = require('pino')
require('elastic-apm-node').start({
  logger: pino({ level: 'info' })
})

or using a Bunyan logger:

const bunyan = require('bunyan')
require('elastic-apm-node').start({
  logger: bunyan.createLogger({ level: 'info' })
})

To get the unstructured logging output similar to agent versions before 3.13, use the following:

require('elastic-apm-node').start({
  logger: require('console-log-level')()
})

As of v4.0.0 a captured exception will always be printed to stderr.

Whether or not the APM agent should monitor for uncaught exceptions (uncaughtException) and send them to the APM Server automatically. This also includes unhandled rejections (unhandledRejection), when the node process is started with --unhandled-rejections=throw, which is the default Node.js behavior since v15 (reference).

When captureExceptions is true and an uncaughtException event is emitted, the APM agent will: capture error details, send that error (and buffered APM data) to APM server, and process.exit(1) (as uncaughtException handlers should). Some things to be aware of:

Set captureExceptions: false to disable this, and get the default Node.js behavior for uncaught exceptions.

Normally only Error objects have a stack trace associated with them. This stack trace is stored along with the error message when the error is sent to the APM Server. The stack trace points to the place where the Error object was instantiated.

But sometimes it’s valuable to know, not where the Error was instantiated, but where it was detected. For instance, when an error happens deep within a database driver, the location where the error bubbles up to, is sometimes more useful for debugging, than where the error occurred.

Set this config option to always to — besides the error stack trace — also capture a stack trace at the location where captureError was called.

By default, this config option has the value messages, which means that a stack trace of the capture location will be recorded only when captureError is called with either a string or the special parameterized message object, in which case a normal stack trace isn’t available.

Set this config option to never to never record a capture location stack trace.

A capture location stack trace is never generated for uncaught exceptions.

Added in: v3.30.0, replaces captureSpanStackTraces and spanFramesMinDuration

Use this option to control if stack traces are never captured for spans (the default), always captured for spans, or only captured for spans that are longer than a given duration. If you choose to enable span stack traces, even if only for slower spans, please read the possible performance implications.

The duration value should be a string of the form '<integer><unit>'. The allowed units are ms for milliseconds, s for seconds, and m for minutes and are case-sensitive. The <unit> is optional and defaults to milliseconds. A Number value of milliseconds may also be provided. For example, '10ms' and 10 are 10 milliseconds, '2s' is 2 seconds.

(Note: If you are migrating from the deprecated spanFramesMinDuration option, the meaning for negative and zero values has changed and the default unit has changed to milliseconds.)

Deprecated in: v3.30.0, use spanStackTraceMinDuration

This option is deprecated — use spanStackTraceMinDuration instead. In versions before v3.30.0 this option was true by default. As of version v3.30.0 this default has effectively changed to false, because the default is spanStackTraceMinDuration: '-1s'.

If spanStackTraceMinDuration is specified, then any provided value for this option is ignored. Otherwise,

Deprecated in: v3.30.0, use spanStackTraceMinDuration

This option is deprecated — use spanStackTraceMinDuration instead. Note that the sense of a negative value and a zero value has switched in the new option. Also note that the default unit has changed from s to ms in the new option.

If spanStackTraceMinDuration is specified, then any provided value for this option is ignored. Otherwise,

The duration value should be a string of the form '<integer><unit>'. The allowed units are ms for milliseconds, s for seconds, and m for minutes and are case-sensitive. The <unit> is optional and defaults to seconds. A Number value of seconds may also be provided. For example, '10ms' is 10 milliseconds, '5' and 5 (number) are 5 seconds.

Set this option to true to use the URL path as the transaction name if no other route could be determined. If the agent do not support your router, you can set this option to true to use specific URL path as the transaction name instead of GET unknown route.

When an error is captured by the agent, its stack trace is stored in Elasticsearch.

By default, the agent will also collect a few lines of source code around the lines for each frame in the stack trace. This can make it easier to determine the cause of an error as the source code related to the error is visible directly in Kibana.

The agent differentiates between so-called in-app frames and library frames. Library frames are frames belonging to Node core and code inside the application’s node_modules folder. In-app frames are everything else.

Use the following two config options to change how many lines of source code to include for the different types of stack frames:

sourceLinesErrorAppFrames

The default value 5 means that 5 lines of source code will be collected for in-app error frames. 2 lines above the stack frame line + 2 below + the stack frame line itself.

Setting this config option to 0 means that no source code will be collected for in-app error frames.

sourceLinesErrorLibraryFrames

The default value 5 means that 5 lines of source code will be collected for error library frames. 2 lines above the stack frame line + 2 below + the stack frame line itself.

Setting this config option to 0 means that no source code will be collected for error library frames.

When a span is recorded by the agent, a stack trace is recorded together with the span, pointing to the location where the span was initiated. This stack trace is stored in Elasticsearch along with the other span data.

By default, the agent will also collect a few lines of source code around the lines for each frame in the stack trace. This can make it easier to determine why and how the span was initiated as the source code related to the span is visible directly in Kibana.

The agent differentiates between so-called in-app frames and library frames. Library frames are frames belonging to Node core and code inside the applications node_modules folder. In-app frames are everything else.

Use the following two config options to change how many lines of source code to include for the different types of stack frames:

sourceLinesSpanAppFrames

The default value 0 means that no source code will be collected for in-app span frames.

sourceLinesSpanLibraryFrames

The default value 0 means that no source code will be collected for span library frames.

Deprecated in: v3.21.0, use longFieldMaxLength

This option is deprecated — use longFieldMaxLength instead.

The maximum length allowed for error messages. It is expressed in bytes or includes a size suffix such as 2kb. Size suffixes are case-insensitive and include b, kb, mb, and gb. Messages above this length will be truncated before being sent to the APM Server. Note that while the configuration option accepts a number of bytes, truncation is based on a number of unicode characters, not bytes.

Set to -1 do disable truncation.

This applies to the following properties:

The following transaction, span, and error fields will be truncated at this number of unicode characters before being sent to APM server:

Note that tracing data is limited at the upstream APM server to max_event_size, which defaults to 300kB. If you configure longFieldMaxLength too large, it could result in transactions, spans, or errors that are rejected by APM server.

Setting it to 0 will disable stack trace collection. Any finite integer value will be used as the maximum number of frames to collect. Setting it to Infinity means that all frames will be collected.

Specify the maximum number of spans to capture within a request transaction before dropping further spans. Setting to -1 means that spans will never be dropped.

The maximum size of buffered events.

Events like transactions, spans, and errors are buffered when the agent can’t keep up with sending them to the APM Server or if the APM server is down. If the queue is full, events are rejected which means you will lose transactions and spans. This guards the application from consuming too much memory and possibly crashing in case the APM server is unavailable for a longer period of time.

A lower value will decrease the heap overhead of the agent, while a higher value makes it less likely to lose events in case of a temporary spike in throughput.

The agent maintains an open HTTP request to the APM Server that is used to transmit the collected transactions, spans, and errors to the server.

To avoid issues with intermittent proxies and load balancers, the HTTP request is ended and a new one created at regular intervals controlled by this config option. The value is expected to be in seconds, or should include a time suffix.

The agent maintains an open HTTP request to the APM Server that is used to transmit the collected transactions, spans, and errors to the server.

To avoid issues with intermittent proxies and load balancers, the HTTP request is ended and a new one created if its body becomes too large. That limit is controlled by this config option. The value is expected to be in bytes, or include a size suffix such as 1mb. Size suffixes are case-insensitive and include b, kb, mb, and gb.

Specify a timeout on the socket used for communication between the APM agent and APM Server. If no data is sent or received on the socket for this amount of time, the request will be aborted. It’s not recommended to set a serverTimeout lower than the apiRequestTime config option. That will likely result in healthy requests being aborted prematurely.

The value should include a time suffix (m for minutes, s for seconds, or ms for milliseconds), but defaults to seconds if no suffix is given.

Added in: v4.3.0

Specify custom headers to be included in HTTP requests by the APM agent to APM Server. Generally this should not be required for normal usage.

Examples:

ELASTIC_APM_APM_CLIENT_HEADERS="foo=bar,spam=eggs"

require('elastic-apm-node').start({
  apmClientHeaders: { foo: 'bar', spam: 'eggs' },
  // ...
})

Remove sensitive data sent to Elastic APM.

The sanitizeFieldNames configuration value allows you to configure a list of wildcard patterns of field names which should be redacted from agent payloads. Wildcard matches are case-insensitive by default. You may make wildcard searches case-sensitive by using the (?-i) prefix. These patterns apply to the request and response HTTP headers, HTTP request cookies, and also any form field captured during an application/x-www-form-urlencoded data request.

The sanitizeFieldNames will redact any matched field names. If you wish to filter or redact other data the API filtering functions may be a better choice.

Array or comma-separated string of module names for which to disable instrumentation. When instrumentation is disabled for a module, no spans will be collected for that module.

Example using options object:

require('elastic-apm-node').start({
  disableInstrumentations: ['graphql', 'redis']
})

Example using environment variable:

ELASTIC_APM_DISABLE_INSTRUMENTATIONS=graphql,redis

For an always up-to-date list of modules for which instrumentation can be disabled, see the lib/instrumentation/modules folder in the agent repository. Note that not all modules represented in this directory will generate spans, and adding those to this array has no effect.

To configure if incoming http requests should be instrumented, see instrumentIncomingHTTPRequests.

Specify the docker container id to associate with all reported events. If absent, it will be parsed out of the /proc/self/cgroup file.

Specify the kubernetes node name to associate with all reported events.

Specify the kubernetes namespace to associate with all reported events.

Specify the kubernetes pod name to associate with all reported events. If absent, and if kubernetesPodUID is parsed out of the /proc/self/cgroup file, this will default to the local hostname.

Specify the kubernetes pod uid to associate with all reported events. If absent, it will be parsed out of the /proc/self/cgroup file.

Specify the interval for reporting metrics to APM Server. The interval should be in seconds, or should include a time suffix.

To disable all metrics reporting, including breakdown metrics, set the interval to "0s".

Specify the maximum number of metrics to track at any given time. When a new metric is inserted which would exceed the limit, the oldest metric will be dropped to give it space.

Supply a key/value pair object of labels to apply to any data recorded by the agent.

Example:

ELASTIC_APM_GLOBAL_LABELS="subspace=sap-hana,rack=number6"

The Node.js agent will look for a file named elastic-apm-node.js in the current working directory. You can specify a custom path using this config option (this path must include the filename), e.g:

ELASTIC_APM_CONFIG_FILE=/path/to/my-elastic-apm-node.js

The configuration file is expected to export an object, following the same conventions as the options object, given as the first argument to the start function, e.g.:

module.exports = {
  // Override service name from package.json
  // Allowed characters: a-z, A-Z, 0-9, -, _, and space
  serviceName: '',

  // Use if APM Server requires a token
  secretToken: '',

  // Set custom APM Server URL (default: http://127.0.0.1:8200)
  serverUrl: ''
}

Set breakdownMetrics: false to disable reporting of breakdown metrics. Note that if metricsInterval: 0, then breakdown metrics will not be reported.

Breakdown metrics (span.self_time.*) record the self-time spent in each unique type of span. This data drives the Time spent by span type chart in the APM app.

Added in: v3.45.0

The disableMetrics configuration variable is a list of wildcard patterns of metric names to not send to APM server. The filter is applied to core APM agent metrics, custom metrics defined by apm.registerMetric(name[, labels], callback), and metrics defined using the OpenTelemetry Metrics API.

For example, setting the ELASTIC_APM_DISABLE_METRICS="nodejs.*,my_counter" environment variable (or the equivalent disableMetrics: ['nodejs.*', 'my_counter'] option to apm.start([options])) will result in reported metrics excluding any metric named my_counter and any starting with nodejs.. Wildcard matches are case-insensitive by default. You may make wildcard searches case-sensitive by using the (?-i) prefix.

Use metricsInterval: '0s' to completely disable metrics collection. See metricsInterval.

Added in: v3.45.0 as experimental

Defines the default bucket boundaries to use for OpenTelemetry Metrics histograms. By default the value is:

[
  0.00390625, 0.00552427, 0.0078125, 0.0110485,
    0.015625,  0.0220971,   0.03125, 0.0441942,
      0.0625,  0.0883883,     0.125,  0.176777,
        0.25,   0.353553,       0.5,  0.707107,
           1,    1.41421,         2,   2.82843,
           4,    5.65685,         8,   11.3137,
          16,    22.6274,        32,   45.2548,
          64,    90.5097,       128,   181.019,
         256,    362.039,       512,   724.077,
        1024,    1448.15,      2048,   2896.31,
        4096,    5792.62,      8192,   11585.2,
       16384,    23170.5,     32768,     46341,
       65536,    92681.9,    131072
]

This differs from the OpenTelemetry default histogram boundaries. To use the OpenTelemetry default boundaries, configure the APM agent with:

apm.start({
  customMetricsHistogramBoundaries: [ 0, 5, 10, 25, 50, 75, 100, 250, 500, 750, 1000, 2500, 5000, 7500, 10000 ],
  // ...
})

or

export ELASTIC_APM_CUSTOM_METRICS_HISTOGRAM_BOUNDARIES=0,5,10,25,50,75,100,250,500,750,1000,2500,5000,7500,10000

To customize the boundaries for specific histogram metrics, use an OpenTelemetry Metrics SDK View. See this script for an example.

See OpenTelemetry bridge for a general guide on using OpenTelemetry with this APM agent.

During startup the Node.js agent queries the local environment to determine whether the application is running in a cloud environment, and provides the agent with details about that environment. These details are called metadata, and will be sent to APM Server with other instrumented data. The cloudProvider configuration value allows you to control this behavior.

If the value is not one of the five listed above, the agent will use the value of auto.

Array or comma-separated string of wildcard patterns that tell the agent to ignore certain queues/topics when instrumenting messaging systems.

When an instrumented messaging system sends or receives a message, the agent will test the queue/topic name against each wildcard in this list. If the name matches, the agent will skip instrumenting the operation.

The ignoreMessageQueues property supports simple wildcard (*) patterns, and may not include commas. Wildcard matches are case-insensitive by default. You may make wildcard searches case-sensitive by using the (?-i) prefix.

Example usage:

require('elastic-apm-node').start({
  ignoreMessageQueues: [
    'overnight_jobs',
    'events_*',
    '(?-i)caseSensitiveSearch'
  ]
})

Added in: v3.34.0

This option allows some control on how the APM agent handles W3C trace-context headers on incoming requests. By default, the traceparent and tracestate headers are used per W3C spec for distributed tracing. However, in certain cases it can be helpful to not use the incoming traceparent header. Some example use cases:

Valid values are:

Starting with Elastic Observability 8.2, span links will be visible in trace views.

Setting this option to false will disable the Span compression feature. Span compression reduces the collection, processing, and storage overhead, and removes clutter from the UI. The tradeoff is that some information, such as DB statements of all the compressed spans, will not be collected.

Example usage:

require('elastic-apm-node').start({
  spanCompressionEnabled: true
})

Consecutive spans that are exact match and that are under this threshold will be compressed into a single composite span. This option does not apply to composite spans. This reduces the collection, processing, and storage overhead, and removes clutter from the UI. The tradeoff is that the DB statements of all the compressed spans will not be collected.

Supports the duration suffixes ms (milliseconds), s (seconds) and m (minutes).

Example usage:

require('elastic-apm-node').start({
  spanCompressionExactMatchMaxDuration:'100ms'
})

Consecutive spans to the same destination that are under this threshold will be compressed into a single composite span. This option does not apply to composite spans. This reduces the collection, processing, and storage overhead, and removes clutter from the UI. The tradeoff is that the DB statements of all the compressed spans will not be collected.

Example usage:

require('elastic-apm-node').start({
  spanCompressionSameKindMaxDuration:'0ms'
})

Added in: v3.34.0 as experimental

Setting this option to true will enable the OpenTelemetry Bridge. Briefly, the OpenTelemetry Bridge allows one to use the vendor-neutral OpenTelemetry Tracing API (@opentelemetry/api) to manually instrument your code, and have the Elastic Node.js APM agent handle those API calls.

Example usage:

require('elastic-apm-node').start({
  opentelemetryBridgeEnabled: true
})

Sets the minimum duration of exit spans. If an exit span’s duration is less than this threshold the agent will attempt to drop the span and not send it.

In some cases exit spans will not be discarded. Spans that propagate the trace context to downstream services, such as outgoing HTTP requests, will not be discarded. However, external calls that don’t propagate context, such as calls to a database, can be discarded using this threshold.

Additionally, spans that lead to an error will not be discarded.

Example usage:

require('elastic-apm-node').start({
  exitSpanMinDuration: '10ms'
})

The URL path patterns for which the APM agent will capture the request body of outgoing requests to Elasticsearch made with the @elastic/elasticsearch module (or the legacy elasticsearch module). The default setting captures the body for Elasticsearch REST APIs making a search.

The captured request body (if any) is stored on the span.db.statement field. Captured request bodies are truncated to a maximum length defined by longFieldMaxLength.

Change default in v4.0.0, in v3.x the default was true

To enable distributed tracing, the agent adds trace context headers to outgoing requests (like HTTP requests, etc.). These headers (traceparent and tracestate) are defined in the W3C Trace Context specification.

When this setting is true, the agent will also add the header elastic-apm-traceparent for backwards compatibility with older versions of Elastic APM agents. (In the next major version of this APM agent, this setting will default to false.)