查询执行慢的SQL

--执行慢的SQL：

SELECT S.SQL_TEXT,

       S.SQL_FULLTEXT,

       S.SQL_ID,

       ROUND(ELAPSED_TIME / 1000000 / (CASE

               WHEN (EXECUTIONS = 0 OR NVL(EXECUTIONS, 1 ) = 1) THEN

                1

               ELSE

                EXECUTIONS

             END),

             2) "执行时间'S'",

       S.EXECUTIONS "执行次数",

       S.OPTIMIZER_COST "COST",

       S.SORTS,

       S.MODULE, --连接模式（JDBC THIN CLIENT：程序）

       -- S.LOCKED_TOTAL,

       S.PHYSICAL_READ_BYTES "物理读",

       -- S.PHYSICAL_READ_REQUESTS "物理读请求",

       S.PHYSICAL_WRITE_REQUESTS "物理写",

       -- S.PHYSICAL_WRITE_BYTES "物理写请求",

       S.ROWS_PROCESSED      "返回行数",

       S.DISK_READS          "磁盘读",

       S.DIRECT_WRITES       "直接路径写",

       S.PARSING_SCHEMA_NAME,

       S.LAST_ACTIVE_TIME

  FROM GV$SQLAREA S

WHERE ROUND(ELAPSED_TIME / 1000000 / (CASE

               WHEN (EXECUTIONS = 0 OR NVL(EXECUTIONS, 1 ) = 1) THEN

                1

               ELSE

                EXECUTIONS

             END),

             2) > 5 --100 0000微秒=1S

   AND S.PARSING_SCHEMA_NAME = USER

   AND TO_CHAR(S.LAST_LOAD_TIME, 'YYYY-MM-DD') =

       TO_CHAR( SYSDATE, 'YYYY-MM-DD' )

   AND S.COMMAND_TYPE IN (2 , 3, 5, 6 , 189)

ORDER BY "执行时间'S'" DESC;

/*  SQL中 COMMAND_TYPE意义:

2：INSERT

3：SELECT

6：UPDATE

7：DELETE

189：MERGE

详情可通过查找V$SQLCOMMAND视图  */

V$SQLAREA    官网解释：http://docs.oracle.com/cd/E11882_01/server.112/e40402/dynviews_3064.htm#REFRN30259

V$SQLCOMMAND 官网解释：http://docs.oracle.com/cd/E11882_01/server.112/e40402/dynviews_3066.htm#REFRN30632