标签：dbms_utility.get_tim dbms_utility.get_cpu
DBMS_UTILITY.GET_TIME与DBMS_UTILITY.GET_CPU_TIME比较
例1：一个计算密集（cpu-bound）型例子
DECLARE
b1 PLS_INTEGER;
b2 PLS_INTEGER;
e1 PLS_INTEGER;
e2 PLS_INTEGER;
n PLS_INTEGER := 0;
BEGIN
b1 := DBMS_UTILITY.GET_TIME();
b2 := DBMS_UTILITY.GET_CPU_TIME();
FOR i IN 1 .. 100000000 LOOP
--NULL;
n := n + 1;
END LOOP;
e1 := DBMS_UTILITY.GET_TIME() - b1;
e2 := DBMS_UTILITY.GET_CPU_TIME() - b2;
DBMS_OUTPUT.PUT_LINE( 'GET_TIME elapsed = ' || e1 || ' hsecs.' );
DBMS_OUTPUT.PUT_LINE( 'GET_CPU_TIME elapsed = ' || e2 || ' hsecs.' );
END;
DECLARE
b1 PLS_INTEGER;
b2 PLS_INTEGER;
e1 PLS_INTEGER;
e2 PLS_INTEGER;
BEGIN
b1 := DBMS_UTILITY.GET_TIME();
b2 := DBMS_UTILITY.GET_CPU_TIME();
FOR r IN ( SELECT * FROM all_source ) LOOP
NULL;
END LOOP;
e1 := DBMS_UTILITY.GET_TIME() - b1;
e2 := DBMS_UTILITY.GET_CPU_TIME() - b2;
DBMS_OUTPUT.PUT_LINE( 'GET_TIME elapsed = ' || e1 || ' hsecs.' );
DBMS_OUTPUT.PUT_LINE( 'GET_CPU_TIME elapsed = ' || e2 || ' hsecs.' );
END;
/PL/SQL 过程已成功完成。
-------------------------------------------
Dylan Presents.
Oracle DBMS_UTILITY.GET_TIME与DBMS_UTILITY.GET_CPU_TIME区别
标签：dbms_utility.get_tim dbms_utility.get_cpu
原文地址：http://blog.csdn.net/indexman/article/details/43341253
