Added another query

Author: kanshiG

articles/cosmos-db/cosmosdb-monitor-resource-logs.md

@@ -151,6 +151,20 @@ For detailed information about how to create a diagnostic setting by using the A
     | where ResourceProvider=="MICROSOFT.DOCUMENTDB" and Category=="PartitionKeyStatistics" 
     | project SubscriptionId, regionName_s, databaseName_s, collectionName_s, partitionKey_s, sizeKb_d, ResourceId
     ```
+ 
+ 1. How to get P99s or P50 for operation latencies, request charge or the length of the respons?
+    ```Kusto
+    AzureDiagnostics
+    | where ResourceProvider=="MICROSOFT.DOCUMENTDB" and Category=="DataPlaneRequests"
+    | where TimeGenerated >= ago(2d)
+    | summarize
+    percentile(todouble(responseLength_s), 50), percentile(todouble(responseLength_s), 99), max(responseLength_s),
+    percentile(todouble(requestCharge_s), 50), percentile(todouble(requestCharge_s), 99), max(requestCharge_s),
+    percentile(todouble(duration_s), 50), percentile(todouble(duration_s), 99), max(duration_s),
+    count()
+    by OperationName, requestResourceType_s, userAgent_s, collectionRid_s, bin(TimeGenerated, 1h)
+    ```
+ 
 
 ## Next steps