[Doc] Live Queries dashboard (#10090)

_observing-your-data/query-insights/query-insights-dashboard.md

@@ -21,6 +21,7 @@
 - [Top N queries](#top-n-queries): Displays the query metrics and details for the top queries.
 - [Query details](#query-details): Displays details for individual queries and query groups.
 - [Configuration](#configuration): Customizes all monitoring and data retention settings for the query insights feature.
+- [Live queries](#live-queries): Monitors currently running queries in real time.
 
 
 ## Top N queries
@@ -182,6 +183,85 @@
 - When setting data retention periods, consider shorter retention periods that save storage but reduce the number of long-term insights.
 - Enable metrics based on your monitoring needs. Monitoring fewer metrics prevents system overload.
 
+## Live queries
+
+The **Live queries** page provides real-time visibility into search queries currently running in your OpenSearch cluster. It enables active monitoring, fast debugging, and insight into how a query's load is distributed across nodes and indexes.
+
+The following image shows the live queries view.
+
+![Live Queries Dashboard]({{site.url}}{{site.baseurl}}/images/Query-Insights/Live_Queries.png)
+
+### Metrics overview
+
+The top panel in the live queries view displays the following key real-time metrics.
+
+| Panel  | Description  |
+| :--- | :--- |
+| **Active queries**       | The total number of currently executing queries.                                |
+| **Avg. elapsed time**    | The average execution time of live queries.                                     |
+| **Longest running query**| The duration and ID of the longest currently executing query.                   |
+| **Total CPU time**       | The cumulative CPU time used by all active queries.                             |
+| **Total memory usage**   | The total memory consumed by live queries.                                      |
+
+### Breakdown charts
+
+Two visual charts provide breakdowns of query load:
+
+- **By node** – Shows how many queries are running on each node.
+- **By index** – Displays how many queries are targeting each index.
+
+![Live Queries visual charts]({{site.url}}{{site.baseurl}}/images/Query-Insights/Live_queries_visuailization.png)
+
+You can toggle between **Donut** and **Bar** chart formats using the chart type switch.
+
+Only the top 9 items are displayed individually in the chart; additional values are grouped under the **Others** category.
+
+### Live queries table
+
+The live queries table lists the following information for each live query.
+
+
+| Column  | Description |
+| :--- | :--- |
+| **Timestamp**        | The time at which the query started running.                            |
+| **Task ID**          | The unique identifier for the search task.                            |
+| **Index**            | The index or indexes the query is targeting.                          |
+| **Node**             | The node currently running the query.                               |
+| **Time elapsed**     | The execution time for the query so far (formatted).                                |
+| **CPU usage**        | The cumulative CPU time used by the query.                            |
+| **Memory usage**     | The amount of memory consumed by the query so far.                              |
+| **Search type**      | The search execution method, such as `query_then_fetch`.               |
+| **Coordinator node** | The node that coordinated the query.                                  |
+| **Status**           | The status of the query task. Can be either `running` or `cancelled`. |
+| **Actions**          | The available controls, such as canceling the query.                  |
+
+You can use the filter bar to search for queries by text or specific field values---such as node ID, index name, or task ID---and paginate the table to better analyze specific queries. The following image shows the live queries table view.
+
+![Live Queries Table]({{site.url}}{{site.baseurl}}/images/Query-Insights/Live_Queries_Table.png)
+
+The live queries table provides the following real-time monitoring controls:
+- **Auto-refresh toggle** – Enable or disable periodic data refresh.
+- **Refresh interval** – Choose the refresh frequency. This option is available only when **Auto-refresh** is enabled.
+- **Manual refresh** – Select the **Refresh** button to update immediately.
+
+### Canceling live queries
+
+The live queries table provides direct controls for canceling queries that are currently running in the cluster. This allows you to immediately stop problematic or resource-intensive searches without waiting for them to finish. You can cancel live queries in the following ways:
+
+1. Cancel an individual query:
+   - In the **Actions** column for the query you want to stop, select the trash can icon. 
+   - When prompted, confirm the cancellation. 
+   Once the cancellation succeeds, the query status changes to `Cancelled`.
+
+2. Cancel multiple queries in bulk:
+   - To select multiple queries, use the checkboxes to the left of the table. To select all queries, use the **Select all** checkbox in the table header.
+   - Select the **Cancel selected** button above the table. 
+   - Confirm the cancellation for all selected queries.
+   All selected queries are stopped and their statuses updated.
+
+
+
+