docs: Add note to Helm values file (#15637)

(cherry picked from commit ad0ea44)
grafana · Jan 8, 2025 · c7a5d9e · c7a5d9e
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diff --git a/docs/sources/setup/install/helm/reference.md b/docs/sources/setup/install/helm/reference.md
@@ -8666,6 +8666,21 @@ false
 			<td><pre lang="json">
 {}
 </pre>
+</td>
+		</tr>
+		<tr>
+			<td>read.persistence</td>
+			<td>object</td>
+			<td>read.persistence is used only if legacyReadTarget is set to true</td>
+			<td><pre lang="json">
+{
+  "annotations": {},
+  "enableStatefulSetAutoDeletePVC": true,
+  "selector": null,
+  "size": "10Gi",
+  "storageClass": null
+}
+</pre>
 </td>
 		</tr>
 		<tr>

diff --git a/production/helm/loki/values.yaml b/production/helm/loki/values.yaml
@@ -1519,6 +1519,7 @@ read:
   tolerations: []
   # -- The default is to deploy all pods in parallel.
   podManagementPolicy: "Parallel"
+  # -- read.persistence is used only if legacyReadTarget is set to true
   persistence:
     # -- Enable StatefulSetAutoDeletePVC feature
     enableStatefulSetAutoDeletePVC: true