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缺省情况下,一个DruidDataSource会使用两个线程分别用于创建连接和销毁或检测连接。在分库分表的某些场景,可能需要数百甚至数千个数据库,因此会创建大量的线程。
DruidDataSource提供了createScheduler和destroyScheduler这两个配置,用于多个DruidDataSource公用创建连接池和销毁连接池。
ScheduledExecutorService createScheduler = ...; ScheduledExecutorService destroyScheduler = ...; DruidDataSource ds0 = ...; DruidDataSource ds1 = ...; ds0.setCreateScheduler(createScheduler); ds1.setCreateScheduler(createScheduler); ds0.setDestroyScheduler(destroyScheduler); ds1.setDestroyScheduler(destroyScheduler);