Node.js trace context in queries

Adding trace context to application queries provides the ability to correlate the queries from a traced transaction, and if sampled, the queries to the transaction trace detail. This feature is also a requirement for the integration of APM with DBO.

Enabling

Trace context propagation to queries is disabled by default. It can be enabled in the Node.js Library using this configuration option:

Trace context is not inserted into server-side prepared statements.

Database type	Client library/framework Versions supported	Notes
MySQL	mysql2	Queries with short-lived connections might not be sampled due to MySql Performance Schema behavior.
PostgreSQL	pg	Short-lived queries, or queries with short-lived connections might not be sampled based on the DBO Agent's polling interval.

Database type

Client library/framework

Notes

MySQL

mysql2

Queries with short-lived connections might not be sampled due to MySql Performance Schema behavior.

PostgreSQL

Short-lived queries, or queries with short-lived connections might not be sampled based on the DBO Agent's polling interval.