/** The JDBC database driver. */指定連接驅動public static final String DB_DRIVER = "driver";/** The JDBC database URL. */ 連接字符串public static final String DB_URL = "URL";/** The database user name. */ 用戶名public static final String DB_USER = "user";/** The database user password. */ 密碼public static final String DB_PASSWORD = "password";/** The maximum number of database connections to have in the pool. Default is 10. */ 連接池最大連接數public static final String DB_MAX_CONNECTIONS = "maxConnections";/** * The maximum number of prepared statements that will be cached per connection in the pool.* Depending upon your JDBC Driver this may significantly help performance, or may slightly * hinder performance. * Default is 120, as Quartz uses over 100 unique statements. 0 disables the feature. */ 每個鏈接最多緩存多少個預編譯語句public static final String DB_MAX_CACHED_STATEMENTS_PER_CONNECTION = "maxCachedStatementsPerConnection";/** * The database sql query to execute every time a connection is returned * to the pool to ensure that it is still valid. */ 驗證連接是否可用的查詢語句public static final String DB_VALIDATION_QUERY = "validationQuery";/** * The number of seconds between tests of idle connections - only enabled* if the validation query property is set. Default is 50 seconds. */ 多久驗證空閑連接public static final String DB_IDLE_VALIDATION_SECONDS = "idleConnectionValidationSeconds";/** * Whether the database sql query to validate connections should be executed every time * a connection is retrieved from the pool to ensure that it is still valid. If false,* then validation will occur on check-in. Default is false. */ 是否每次從池中取連接時，驗證連接可用性public static final String DB_VALIDATE_ON_CHECKOUT = "validateOnCheckout";/** Discard connections after they have been idle this many seconds. 0 disables the feature. Default is 0.*/ 空閑連接超過多少秒丟棄private static final String DB_DISCARD_IDLE_CONNECTIONS_SECONDS = "discardIdleConnectionsSeconds"; /** Default maximum number of database connections in the pool. */ 最大連接數public static final int DEFAULT_DB_MAX_CONNECTIONS = 10;/** Default maximum number of database connections in the pool. */ 默認每個鏈接緩存120個預編譯語句public static final int DEFAULT_DB_MAX_CACHED_STATEMENTS_PER_CONNECTION = 120;

quartz連接池配置對C3PO連接池配置進行了一些封裝， 留作記錄。

mysql 斷開連接可以通過設置 validateOnCheckout=true + validationQuery

或者設置discardIdleConnectionsSeconds 少于8小時解決。

轉載于:https://www.cnblogs.com/snowlove67/p/4958406.html

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