What does connection pool mean?

Connection pool is the database connection pool, which means that enough database connections are established when the program starts, and these connections are formed into a connection pool, and the program dynamically accesses the connection pool. The connection is applied for, used and released.

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Let’s analyze the advantages of using connection pools.

The connection pool mainly has the following three advantages:

First, reduce the time to create a connection

The connections in the connection pool are prepared and can be repeated After being used, the database can be accessed directly, thus reducing the number and time of connection creation.

Second, simplified programming method

When using the connection pool, each individual thread can operate like creating its own JDBC connection, allowing users to directly use the number and time.

Third, control the use of resources

If you do not use a connection pool, you need to create a connection every time you access the database. In this way, the stability of the system is greatly affected by the system connection requirements, which is easy Produces resource waste and high load anomalies.

Connection pooling can maximize performance and control resource utilization to a certain level. The connection pool can control the number of connections in the pool, which enhances the stability of the system when used by a large number of users.

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