MySQL connection is reset, how to ensure the health of the connection pool through connection keepalive?

MySQL connection is reset, how to ensure the health of the connection pool through connection keep-alive?

When using the MySQL database, the connection is often reset, causing the database connection to be interrupted, which is very unreliable for the application. In order to solve this problem, you can ensure the health of the connection pool by keeping the connection alive.

Connection keep-alive means sending a specific query statement when the connection is idle to keep the connection active and prevent the connection from being actively closed by the server. This specific query statement can be a simple SELECT statement, such as "SELECT 1", or it can be another query statement without side effects, as long as it does not cause a burden on the database.

The following is an introduction on how to ensure the health of the connection pool through connection keep-alive:

1. Configuring the connection timeout: First, you need to set the connection timeout in the configuration of the database connection pool time. The connection timeout period refers to how long it takes for the connection to be idle and not used before it is closed by the server. By setting a reasonable connection timeout, you can reduce the occurrence of connection resets.
2. Set the connection keep-alive query statement: In the application, you need to set up a scheduled task to regularly send the connection keep-alive query statement. Scheduled tasks can be implemented using timers or scheduling frameworks. Generally speaking, you can set the connection keep-alive query statement to be sent every period of time, for example, every 5 minutes.
3. Monitor connection status: In the application, you can determine whether the connection is normal by monitoring the connection status. If the connection is reset, appropriate processing can be performed, such as re-establishing the connection or notifying the administrator.
4. Avoid connection leaks: Connection leaks refer to connections that are not released correctly and are occupied for a long time, causing the connection pool to be exhausted. In order to avoid connection leaks, you can ensure that the connection is released promptly after use in the application, or use the automatic recycling function of the connection pool.

Through the above measures, you can effectively ensure the health of the connection pool through connection keep-alive and avoid the situation of the connection being reset. Connection keep-alive can not only improve the reliability of the application, but also reduce the burden on the database server and improve the response speed of the application.

In actual applications, the connection timeout and the frequency of the connection keep-alive query statement need to be adjusted according to the specific situation. At the same time, it is also necessary to regularly monitor the usage of the connection pool and adjust the size of the connection pool in a timely manner to meet the needs of the application.

In short, connection keep-alive can effectively solve the problem of connection being reset and ensure the health of the connection pool. When using the MySQL database, properly configuring the connection timeout, setting the connection keep-alive query statement, and monitoring the connection status can improve the reliability and performance of the application.

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