Add configs description for dedicated datasource

application/src/main/resources/thingsboard.yml

@@ -768,23 +768,28 @@ spring:
       leakDetectionThreshold: "${SPRING_DATASOURCE_HIKARI_LEAK_DETECTION_THRESHOLD:0}"
       # This property increases the number of connections in the pool as demand increases. At the same time, the property ensures that the pool doesn't grow to the point of exhausting a system's resources, which ultimately affects an application's performance and availability
       maximumPoolSize: "${SPRING_DATASOURCE_MAXIMUM_POOL_SIZE:16}"
-      registerMbeans: "${SPRING_DATASOURCE_HIKARI_REGISTER_MBEANS:false}" # true - enable MBean to diagnose pools state via JMX
+      # Enable MBean to diagnose pools state via JMX
+      registerMbeans: "${SPRING_DATASOURCE_HIKARI_REGISTER_MBEANS:false}"
     dedicated:
+      # Enable dedicated datasource (a separate database) for events and audit logs.
+      # Before enabling this, make sure you have set up the following tables in the new DB:
+      # error_event, lc_event, rule_chain_debug_event, rule_node_debug_event, stats_event, audit_log
       enabled: "${SPRING_DEDICATED_DATASOURCE_ENABLED:false}"
-      # Database driver for Spring JPA - org.postgresql.Driver
+      # Database driver for Spring JPA for dedicated datasource
       driverClassName: "${SPRING_DEDICATED_DATASOURCE_DRIVER_CLASS_NAME:org.postgresql.Driver}"
-      # Database connection URL
+      # Database connection URL for dedicated datasource
       url: "${SPRING_DEDICATED_DATASOURCE_URL:jdbc:postgresql://localhost:5432/thingsboard_dedicated}"
-      # Database user name
+      # Database user name for dedicated datasource
       username: "${SPRING_DEDICATED_DATASOURCE_USERNAME:postgres}"
-      # Database user password
+      # Database user password for dedicated datasource
       password: "${SPRING_DEDICATED_DATASOURCE_PASSWORD:postgres}"
       hikari:
-        # This property controls the amount of time that a connection can be out of the pool before a message is logged indicating a possible connection leak. A value of 0 means leak detection is disabled
+        # This property controls the amount of time that a connection can be out of the pool before a message is logged indicating a possible connection leak for dedicated datasource. A value of 0 means leak detection is disabled
         leakDetectionThreshold: "${SPRING_DEDICATED_DATASOURCE_HIKARI_LEAK_DETECTION_THRESHOLD:0}"
-        # This property increases the number of connections in the pool as demand increases. At the same time, the property ensures that the pool doesn't grow to the point of exhausting a system's resources, which ultimately affects an application's performance and availability
+        # This property increases the number of connections in the pool as demand increases for dedicated datasource. At the same time, the property ensures that the pool doesn't grow to the point of exhausting a system's resources, which ultimately affects an application's performance and availability
         maximumPoolSize: "${SPRING_DEDICATED_DATASOURCE_MAXIMUM_POOL_SIZE:16}"
-        registerMbeans: "${SPRING_DEDICATED_DATASOURCE_HIKARI_REGISTER_MBEANS:false}" # true - enable MBean to diagnose pools state via JMX
+        # Enable MBean to diagnose pools state via JMX for dedicated datasource
+        registerMbeans: "${SPRING_DEDICATED_DATASOURCE_HIKARI_REGISTER_MBEANS:false}"
 
 # Audit log parameters
 audit-log: