add opt-out of search telemetry in OS dashboards

_dashboards/search-telemetry.md

@@ -0,0 +1,44 @@
+---
+layout: default
+title: Search telemetry
+nav_order: 30
+---
+
+
+# About search telemetry
+
+You can use search telemetry to analyze search request performance by success or failure in OpenSearch Dashboards. OpenSearch stores telemetry data in the `.kibana_1` index.
+
+Because there are thousands of concurrent search requests from OpenSearch Dashboards, the heavy traffic can cause significant load in an OpenSearch cluster.
+
+OpenSearch clusters perform better with search telemetry turned off.
+{: .tip }
+
+## Turn on search telemetry
+
+Search usage telemetry is turned off by default. To turn it on, you need to set `data.search.usageTelemetry.enabled` to `true` in the `opensearch_dashboards.yml` file.
+
+You can find the [OpenSearch Dashboards YAML file](https://github.com/opensearch-project/OpenSearch-Dashboards/blob/main/config/opensearch_dashboards.yml) in the opensearch-project repository on GitHub.
+
+Turning on telemetry in the `opensearch_dashboards.yml` file overrides the default search telemetry setting of `false` in the [Data plugin configuration file](https://github.com/opensearch-project/OpenSearch-Dashboards/blob/main/src/plugins/data/config.ts).
+{: .note }
+
+### Turn search telemetry on or off
+
+The following table shows the `data.search.usageTelemetry.enabled` values you can set in `opensearch_dashboards.yml` to turn search telemetry on or off.
+
+OpenSearch Dashboards YAML value  | Search telemetry status: on or off
+:--- |  :---
+ `true`  | On
+ `false` | Off
+ `none`  | Off
+
+#### Sample opensearch_dashboards.yml with telemetry enabled
+
+ This OpenSearch Dashboards YAML file excerpt shows the telemetry setting set to `true` to turn on search telemetry:
+
+ ```json
+# Set the value of this setting to false to suppress 
+# search usage telemetry to reduce the load of the OpenSearch cluster.
+ data.search.usageTelemetry.enabled: true
+```