标签：http color os io 使用 ar 数据 art div
一朋友使用autotrace查看数据库执行计划发现结果如下,Statistics中很多信息为0,这个肯定是不正常现象,什么都可以为0,consistent gets也不可能为0.
SQL> set autot onSQL> select count(*) from RACV_DATA.PARTY_DUMMY; COUNT(*)---------- 47Elapsed: 00:00:00.00Execution Plan----------------------------------------------------------Plan hash value: 3621440939--------------------------------------------------------------------------| Id | Operation | Name | Rows | Cost (%CPU)| Time |--------------------------------------------------------------------------| 0 | SELECT STATEMENT | | 1 | 3 (0)| 00:00:01 || 1 | SORT AGGREGATE | | 1 | | || 2 | TABLE ACCESS FULL| PARTY_DUMMY | 47 | 3 (0)| 00:00:01 |--------------------------------------------------------------------------Statistics---------------------------------------------------------- 0 recursive calls 0 db block gets 0 consistent gets 0 physical reads 0 redo size 0 bytes sent via SQL*Net to client 0 bytes received via SQL*Net from client 0 SQL*Net roundtrips to/from client 0 sorts (memory) 0 sorts (disk) 1 rows processed |
解决方法
SQL> select owner,object_name from dba_objects where object_name=‘PLAN_TABLE‘;no rows selectedSQL> @?/rdbms/admin/utlxplan.sqlTable created. |
重新查看Statistics信息
Statistics---------------------------------------------------------- 0 recursive calls 0 db block gets 7 consistent gets 0 physical reads 0 redo size 522 bytes sent via SQL*Net to client 524 bytes received via SQL*Net from client 2 SQL*Net roundtrips to/from client 0 sorts (memory) 0 sorts (disk) 1 rows processed |
http://www.xifenfei.com/3306.html
autotrace显示Statistics很多信息为0(转)
标签：http color os io 使用 ar 数据 art div
原文地址：http://www.cnblogs.com/softidea/p/3949804.html
