added system and db metrics

Author: khelanmodi

articles/cosmos-db/mongodb/vcore/TOC.yml

@@ -99,7 +99,7 @@
     - name: Monitor
       items:
       - name: Monitor metrics
-        href: request-metrics.md
+        href: monitor-metrics.md
       - name: Monitor diagnostics logs
         href: how-to-monitor-diagnostics-logs.md
     - name: Use Azure Private Link

articles/cosmos-db/mongodb/vcore/index.yml

@@ -58,8 +58,6 @@ landingContent:
             url: how-to-restore-cluster.md
           - text: Monitor diagnostics logs
             url: how-to-monitor-diagnostics-logs.md
-          - text: Request metrics
-            url: request-metrics.md
       - linkListType: concept
         links:
           - text: MongoDB feature support

articles/cosmos-db/mongodb/vcore/media/monitor/monitor-metric-mongo-request-duration.png

@@ -23,11 +23,23 @@ It delivers:
 * **Drill-down analysis** of a particular Azure Cosmos DB resource. You can diagnose issues or perform detailed analysis by using the categories of utilization, failures, capacity, and operations. Selecting any one of the options provides an in-depth view of the relevant Azure Cosmos DB metrics.
 * **Customizable** experience built on top of Azure Monitor workbook templates. You can change what metrics are displayed, modify or set thresholds that align with your limits, and then save into a custom workbook. Charts in the workbooks can then be pinned to Azure dashboards.
 
+## Metrics available today
+### System Metrics (available on all cluster tiers)
+1. **Committed memory percent**: Shows the percentage of the committed memory limit that is allocated by applications on a node. This metric helps in monitoring the memory usage against the allocated limit.
+1. **CPU percent**: Indicates the CPU utilization on a node. 
+1. **Memory percent**: Shows the memory utilization on a node. 
+1. **Storage percent:** Displays the available storage percentage on a node. 
+1. **Storage used**: Represents the actual amount of storage used on a node. This metric is crucial for understanding the storage consumption trends and managing storage resources.
+1. **IOPS:** Measures the disk IO operations per second on a node. It provides insights into the read and write performance of the storage system, helping to optimize disk usage.
+
+### Database Metrics 
+1. **Mongo request duration**: Captures the end-to-end duration in milliseconds of client MongoDB requests handled by the Mongo cluster, updated every 60 seconds. This metric is vital for assessing the responsiveness and latency of the database operations.
+
 >[!NOTE]
->There's no charge to access this feature. However, you'll have to be on the M40 cluster tier or higher to access the metrics. For more information on upgrading, please refer to [this guide](./how-to-scale-cluster.md).
+>There's no charge to access Database metrics. However, you'll have to be on the M40 cluster tier or higher to access the metrics. For more information on upgrading, please refer to [this guide](./how-to-scale-cluster.md).
 
 
-## View the total memory usage metric
+## View Metrics
 
 1. Sign in to the [Azure portal](https://portal.azure.com).
 
@@ -37,11 +49,11 @@ It delivers:
 
    :::image type="content" source="./media/monitor/monitor-metrics-blade.png" alt-text="Metrics blade in Azure Cosmos DB":::
 
-1. Next select the **Memory percent** metric from the list of available metrics. In this example, let's select **Memory percent** and **Avg** as the aggregation value. In addition to these details, you can also select the **Time range** and **Time granularity** of the metrics. At max, you can view metrics for the past 30 days.  After you apply the filter, a chart is displayed based on your filter. You can see the average number of request units consumed per minute for the selected period.  
+1. Next select the **Monogo request duration** metric from the list of available metrics. In this example, let's select **Mongo request duration** and **Avg** as the aggregation value. In addition to these details, you can also select the **Time range** and **Time granularity** of the metrics. At max, you can view metrics for the past 30 days.  After you apply the filter, a chart is displayed based on your filter. You can see the average number of request units consumed per minute for the selected period.  
 
-   :::image type="content" source="./media/monitor/monitor-metric-memory-percent.png" alt-text="Choose a metric from the Azure portal" border="true":::
+   :::image type="content" source="./media/monitor/monitor-metric-mongo-request-duration.png" alt-text="Choose a metric from the Azure portal" border="true":::
 
-## Filters for memory request duration
+## Filters for Database metrics
 
 1. You can also filter metrics and get the charts displayed by a specific **CollectionName**, **DatabaseName**, **Operation**, and **StatusCode**. The **Add filter** and **Apply splitting** options allows you to filter the usage and group the metrics.