Update content/en/tracing/trace_collection/proxy_setup/_index.md

wantsui · dgoffredo · web-flow · commit 01e52c472671 · 2022-07-12T12:53:04.000-04:00
Co-authored-by: David Goffredo &lt;david.goffredo@datadoghq.com&gt;
diff --git a/content/en/tracing/trace_collection/proxy_setup/_index.md b/content/en/tracing/trace_collection/proxy_setup/_index.md
@@ -575,7 +575,7 @@ of the higher-level `CronJob`.
 
 To control the volume of traces starting from Istio that are sent to Datadog, specify a sampling rate by setting the parameter `DD_TRACE_SAMPLING_RULES` to a value between `0.0` (0%) and `1.0` (100%). If no value is specified, 100% of traces starting from Istio are sent.
 
-**Note:** These sampling environment variables rules work if `--set values.pilot.traceSampling=100.0` has been configured.
+Note that these environment variables apply only to the subset of traces indicated by the `values.pilot.traceSampling` setting, hence the required `--set values.pilot.traceSampling=100.0` during Istio configuration.
 
 To use the [Datadog Agent calculated sampling rates][9] (10 traces per second per Agent) and ignore the default sampling rule set to 100%, set the parameter `DD_TRACE_SAMPLING_RULES` to an empty array:
 
