doc: document trace-events category for dns requests

As implemented in #21840, dns can emit trace events when the category is enabled. This PR just add it to the documentation. PR-URL: #28100 Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Rich Trott <[email protected]> Reviewed-By: James M Snell <[email protected]>
nodejs · Jun 17, 2019 · ecb963d · ecb963d
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commit ecb963d
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diff --git a/doc/api/tracing.md b/doc/api/tracing.md
@@ -20,6 +20,7 @@ The available categories are:
 * `node.bootstrap` - Enables capture of Node.js bootstrap milestones.
 * `node.console` - Enables capture of `console.time()` and `console.count()`
   output.
+* `node.dns.native` - Enables capture of trace data for DNS queries.
 * `node.environment` - Enables capture of Node.js Environment milestones.
 * `node.fs.sync` - Enables capture of trace data for file system sync methods.
 * `node.perf` - Enables capture of [Performance API] measurements.