Hikari JMX Monitoring Guide56

Hikari is a fast and reliable Java connection pool library that is widely used in production applications. It offers a range of features to improve the performance and reliability of database connections, including connection pooling, leak detection, and transaction management.

Hikari provides a JMX (Java Management Extensions) interface that allows you to monitor and manage your connection pools. This interface can be used to obtain detailed information about the pool's configuration, usage, and performance metrics.

In this tutorial, we will show you how to enable JMX monitoring for Hikari and how to use the JMX interface to monitor your connection pools.

Prerequisites

Before you can enable JMX monitoring for Hikari, you must first ensure that JMX is enabled in your Java application. You can do this by adding the following property to your JVM arguments:```
-
```

You will also need to specify the port that the JMX server will listen on. You can do this by adding the following property to your JVM arguments:```
-=9999
```

Once you have enabled JMX in your application, you can proceed to enable JMX monitoring for Hikari.

Enable JMX Monitoring for Hikari

To enable JMX monitoring for Hikari, you need to add the following property to your Hikari configuration:```java
(new JmxConfig().build());
```

This will create a JMX registry and register the Hikari connection pool with it. The JMX registry will expose a set of MBeans that can be used to monitor the connection pool.

Monitoring the Connection Pool

Once you have enabled JMX monitoring for Hikari, you can use a JMX client to monitor your connection pools. There are a number of different JMX clients available, including the JConsole and VisualVM tools that are included with the Java Development Kit (JDK).

To monitor your connection pools using JConsole, follow these steps:1. Open JConsole.
2. Select the "MBeans" tab.
3. Expand the "" node.
4. Select the "HikariPool-poolName" MBean for the connection pool that you want to monitor.

The HikariPool-poolName MBean will provide you with a set of attributes that can be used to monitor the connection pool. These attributes include:* Active Connections: The number of active connections in the pool.
* Idle Connections: The number of idle connections in the pool.
* Pending Connections: The number of connections that are currently being created or destroyed.
* Created Connections: The total number of connections that have been created by the pool.
* Destroyed Connections: The total number of connections that have been destroyed by the pool.
* Connection Timeout: The maximum amount of time that a connection can remain idle before it is destroyed.
* Maximum Connections: The maximum number of connections that the pool can create.

You can use these attributes to monitor the performance and usage of your connection pools. For example, you can use the Active Connections attribute to ensure that there are always enough connections available to meet the demands of your application.

Conclusion

Hikari JMX monitoring is a powerful tool that can help you to monitor and manage your connection pools. By enabling JMX monitoring, you can gain detailed insights into the performance and usage of your connection pools, which can help you to identify and resolve any issues that may arise.

2024-11-24

Previous：How to Set Up a Comprehensive Monitoring System for Optimal Performance

Next：Coaxial Surveillance Assembly Tutorial: A Comprehensive Guide