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Hibernate's own connection pooling algorithm is however quite rudimentary. It is intended to help you get started and is not intended for use in a production system or even for performance testing. You should use a third party pool for best performance and stability. Just replace the hibernate.connection.pool_size property with connection pool specific settings. This will turn off Hibernate's internal pool. For example, you might like to use C3P0.
C3P0 is an open source JDBC connection pool distributed along with Hibernate in the lib directory. Hibernate will use its org.hibernate.connection.C3P0ConnectionProvider for connection pooling if you set hibernate.c3p0.* properties. If you'd like to use Proxool refer to the packaged hibernate.properties and the Hibernate web site for more information.
Here is an example hibernate.properties file for C3P0:
hibernate.connection.driver_class = org.postgresql.Driverhibernate.connection.url = jdbc:postgresql://localhost/mydatabasehibernate.connection.username = myuserhibernate.connection.password = secrethibernate.c3p0.min_size=5hibernate.c3p0.max_size=20hibernate.c3p0.timeout=1800hibernate.c3p0.max_statements=50hibernate.dialect = org.hibernate.dialect.PostgreSQLDialect
/**********寮曠敤缁撴潫*********/
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hibernate.connection.provider_class=org.hibernate.connection.C3P0ConnectionProvider
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/*************鎺掔増寮濮**************/
# Database connection settings
hibernate.connection.driver_class=com.mysql.jdbc.Driver
hibernate.connection.url=jdbc:mysql://localhost:3306/mydb
hibernate.connection.username=username
hibernate.connection.password=password
# configuration pool
hibernate.connection.provider_class=org.hibernate.connection.C3P0ConnectionProvider
hibernate.c3p0.min_size=5
hibernate.c3p0.max_size=15
hibernate.c3p0.timeout=3600
hibernate.c3p0.max_statements=50
# SQL dialect
hibernate.dialect=org.hibernate.dialect.MySQLDialect
# Enable Hibernate's automatic session context management
hibernate.current_session_context_class=thread
# Echo all executed SQL to stdout
hibernate.show_sql=true
# Drop and re-create the database schema on startup
hibernate.hbm2ddl.auto=update
/*************鎺掔増缁撴潫**************/
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/*********鎺掔増寮濮***********/
<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.max_size">15</property>
<property name="hibernate.c3p0.timeout">3600</property> <!-- seconds -->
<property name="hibernate.c3p0.max_statements">50</property>
/**********鎺掔増缁撴潫****************/
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鈶犲紩鐢ㄧ殑鍑哄锛2008骞9鏈10鏃 18:26:56淇敼鐗堬級锛http://docs.jboss.org/hibernate/stable/core/reference/en/html/configuration-hibernatejdbc.html
