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Message queues

The New Relic Node.js agent supports the amqplib RabbitMQ client library, giving you insight into the performance of your message processing, for both incoming and outgoing messages.

The APM UI will show transactions initiated via RabbitMQ message receipt (subscribe/consume messages) as Message background tasks. Message creation via RabbitMQ also appears in transaction traces.

This feature requires New Relic Node.js agent version 2.0.0 or higher.

Performance improvements with background tasks

One way to increase responsiveness of web applications is to delegate work to background processes. Message queues are commonly used for this inter-process communication.

In the context of message queuing systems, applications typically interact with message brokers to send and receive messages. The amqplib client library allows Node.js applications to interface with message brokers that implement the Advanced Message Queueing Protocol (AMQP) 0.9 or higher.

New Relic's Node.js agent shows messages sent and received using the RabbitMQ client library. With this visibility, you can see details including:

  • Number of messages produced by your app
  • Time your app spends publishing messages
  • Time your app spends processing "consumed" messages

APM conveniently groups and reports operations that interact with queues. By analyzing this information, you can more easily identify bottlenecks and areas for performance improvement in your message passing architecture.

Queue operations

Supported entry points for queue operations appear as Put (publish a message) or Take (receive a message) in APM's user interface.

Queue operations

Publish a message (Put in UI)

Receive a message (Take in UI)

RabbitMQ

publish

sendToQueue

get

consume

View in New Relic UI

Queue operations appear on APM's Transactions page for the selected app. The Put and Take metrics appear in the Breakdown table and are categorized as MessageBroker metrics. Here is an example:

one.newrelic.com > All capabilities > APM & services > Applications > (select an app) > Transactions > (select a transaction): The transaction's Breakdown table categorizes queue operations as MessageBroker metrics and labels them as Put (publish a message) or Take (receive a message).

The Transaction trace summary page may show Put and Take operations in the Slowest components section. For example:

one.newrelic.com > All capabilities > APM & services > Applications > (select an app) > Summary > (select a transaction trace): In this example, the selected transaction trace's Summary shows RabbitMQ operations in the colored bar chart. The Slowest components section also lists the RabbitMQ Put and Take results.

The Transaction trace page also includes a dedicated Messages tab that shows a summary of the message activity that occurred as part of the transaction.

Tip

You can select transaction traces from the app's Summary or Transactions pages in APM.

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