我使用c3p0-0.9.5.2.jar和mchange-commons-
java-0.2.11.jar来管理池连接,
我使用postgresql 9.3.
我使用postgresql 9.3.
我在Prod环境中每天至少收到一次这些消息:
Caused by: java.sql.sqlException: Connections Could not be acquired from the underlying database! at com.mchange.v2.sql.sqlUtils.tosqlException(sqlUtils.java:118) at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:692) at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:140) at org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.getConnection(LocalDataSourceConnectionProvider.java:81) at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446) ... 212 more Caused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool Could not acquire a resource from its primary factory or source. at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1469) at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:644) at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:554) at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(C3P0PooledConnectionPool.java:758) at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:685) ... 215 more Caused by: org.postgresql.util.PsqlException: FATAL: remaining connection slots are reserved for non-replication superuser connections at org.postgresql.core.v3.ConnectionFactoryImpl.readStartupMessages(ConnectionFactoryImpl.java:712)
我在我的应用程序中有这个配置:
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"> <beans> <bean id="dataSource" class = "com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"> <property name="driverClass" value="org.postgresql.Driver"/> <property name="jdbcUrl" value="jdbc:postgresql://localhost:5432/Test"/> <property name="user" value="postgres"/> <property name="password" value="postgres"/> <!-- pool sizing --> <!-- pool sizing --> <property name="initialPoolSize" value="32" /> <property name="minPoolSize" value="30" /> <property name="maxPoolSize" value="300" /> <property name="acquireIncrement" value="10" /> <property name="maxStatements" value="0" /> <!-- retries --> <property name="acquireRetryAttempts" value="30" /> <property name="acquireRetryDelay" value="1000" /> <!-- 1s --> <property name="breakAfteracquireFailure" value="false" /> <!-- refreshing connections --> <property name="maxIdleTime" value="180" /> <!-- 3min --> <property name="maxConnectionAge" value="10" /> <!-- 1h --> <!-- timeouts and testing --> <property name="checkoutTimeout" value="0" /> <!-- 60s --> <property name="idleConnectionTestPeriod" value="60" /> <!-- 60 --> <property name="testConnectionOnCheckout" value="true" /> <property name="preferredTestQuery" value="SELECT 1" /> <property name="testConnectionOnCheckin" value="true" /> </bean> </beans>
max_connections = 300 shared_buffers = 32GB
是否有人可以帮助我解决这个问题
先感谢您
解决方法
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