How should the maximum connection limit be set for the JDBC connection pool?

In a JDBC connection pool, the maximum connection limit refers to the maximum number of connections allowed in the pool. Once the number of connections in the pool reaches this limit, new connection requests will be either blocked or throw an exception. The setting of the maximum connection limit should be adjusted based on actual usage, considering factors such as:

1. There is a maximum connection limit for databases, which the connection pool cannot exceed.
2. Set the maximum number of connections based on the access pressure and concurrency of the application system, ensuring that the number of connections in the connection pool can meet the needs of the application system.
3. System resource limit: a large number of connections may use up system resources, leading to a decrease in system performance, therefore it is necessary to consider system resource limits when setting the maximum number of connections.

In general, the setting of the maximum number of connections should be adjusted according to the actual situation. You can first set a reasonable initial value based on the maximum connection limit of the database, and then adjust it based on the access pressure of the application system and system resource limitations. The maximum number of connections can be set through the configuration parameters of the connection pool, and the specific setting method and parameters may vary depending on the implementation of the connection pool.