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Tag Archives: ARRAY BIND
批量加载性能案例
客户在大量加载数据是遇到性能问题,检查后发现客户采用的是单条插入单条提交这种最缓慢的方式,为了给客户说明优化效果,现场做了几个代码。 最简单的优化方式莫过于减少COMMIT频度,而最优化的方式是采用批量插入的方式,简单的测试代码如下: SQL> CREATE TABLE T_INSERT (ID NUMBER, NAME VARCHAR2(30)); TABLE created. SQL> SET TIMING ON SQL> BEGIN 2 FOR I IN 1..100000 LOOP 3 INSERT INTO T_INSERT VALUES (I, ‘A’ || I); 4 COMMIT; 5 END LOOP; 6 END; … Continue reading