clarify that tail-based sampling is only available for es output (#4734)

(cherry picked from commit 7a2673c)
elastic · Jan 3, 2025 · dea9a59 · dea9a59
1 parent 9f9461e
commit dea9a59
Show file tree

Hide file tree

Showing 2 changed files with 8 additions and 1 deletion.
diff --git a/docs/en/observability/apm/configure/sampling.asciidoc b/docs/en/observability/apm/configure/sampling.asciidoc
@@ -4,7 +4,8 @@
 ****
 image:./binary-yes-fm-yes.svg[supported deployment methods]
 
-Most options on this page are supported by all APM Server deployment methods.
+Most options on this page are supported by all APM Server deployment methods when writing to {es}.
+If you are using a different <<apm-configuring-output,output>>, tail-based sampling is _not_ supported.
 ****
 
 Tail-based sampling configuration options.

diff --git a/docs/en/observability/apm/data-model/transactions/sampling.asciidoc b/docs/en/observability/apm/data-model/transactions/sampling.asciidoc
@@ -115,6 +115,12 @@ Refer to the documentation of your favorite OpenTelemetry agent or SDK for more
 [[apm-tail-based-sampling]]
 == Tail-based sampling
 
+[NOTE]
+====
+Tail-based sampling is only supported when writing to {es}.
+If you are using a different <<apm-configuring-output,output>>, tail-based sampling is _not_ supported.
+====
+
 In tail-based sampling, the sampling decision for each trace is made after the trace has completed.
 This means all traces will be analyzed against a set of rules, or policies, which will determine the rate at which they are sampled.