Add new metrics

Signed-off-by: Neaj Morshad <[email protected]>

kubedb/mssql_standard.collector.yml

@@ -203,6 +203,24 @@ metrics:
       SELECT DATEDIFF(second, sqlserver_start_time, GETUTCDATE()) AS uptime_seconds
       FROM sys.dm_os_sys_info
 
+  - metric_name: sqlserver_ag_cluster_size
+    type: gauge
+    help: 'Number of active replicas in the SQL Server Availability Group.'
+    values: [active_replicas]
+    query: |
+      SELECT COUNT(*) AS active_replicas
+      FROM sys.dm_hadr_availability_replica_states
+      WHERE role_desc <> 'RESOLVING';
+
+  - metric_name: sqlserver_compilations_per_sec
+    type: gauge
+    help: 'Number of SQL compilations per second in SQL Server.'
+    values: [sql_compilations_per_sec]
+    query: |
+      SELECT cntr_value AS sql_compilations_per_sec
+      FROM sys.dm_os_performance_counters
+      WHERE counter_name = 'SQL Compilations/sec';
+
 queries:
   # Populates `mssql_io_stall` and `mssql_io_stall_total`
   - query_name: mssql_io_stall