# Use connection pooling. 使用连接池 connection pooling # Choose appropriate isolation levels. 选择合适的隔离级别 # Use Statement pooling. 使用statement pooling # Statements versus Prepared Statements: When to Use What? 合适的选用Statement 或者 PreparedStatement # Tune the SQL to minimize the data returned (e.g. not ‘SELECT *’). 进行SQL调优来减少返回的数据集 比如不使用select * # Avoid the Usage of Metadata Methods (e.g DatabaseMetaData.getColumns() whenever Possible. They are expensive. 尽可能的避免使用Metadata方法(比如DatabaseMetaData.getColumns()) # Try to combine queries and batch updates. 合并查询和进行批量更新 # Use stored procedures.使用存储过程 # Cache data to avoid repeated queries.对数据进行缓存来避免重复查询 # Close resources (Connections, Statements, ResultSets) when finished with.操作结束时关闭资源(连接,statement, ResultSet等等) |
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