脚本之找出占用了Buffer Cache里大量的buffer的数据库对象

找出大量消耗（占用）了Buffer Cache（里的buffer的个数）的数据库对象。下面的语句就可以完成这一工作：

SQL> column c0 heading 'Owner'                     format a15

SQL> column c1 heading 'Object|Name'               format a30

SQL> column c2 heading 'Number|of|Buffers' //该数据库对象使用了的buffer的个数        format 999,999

SQL> column c3 heading 'Percentage|ofData|Buffer' //该数据库对象使用了的buffer的个数与buffer cache里总
buffer的个数的百分比    format 999,999,999

SQL> select

  2     owner                        c0,

  3     object_name                  c1,

  4     count(1)                     c2,

  5     (count(1)/(select count(*) from v$bh)) *100  c3

  6  from

  7     dba_objects o,

  8     v$bh        bh

  9  where

 10     o.object_id  = bh.objd

 11  and

 12     o.owner not in ('SYS','SYSTEM')

 13  group by

 14     owner,

 15     object_name

 16  order by

 17     count(1) desc

 18  ;

C0              C1                                     C2         C3

--------------- ------------------------------ ---------- ----------

PLSQLDEV        STANDARD_CITY                  17290      72.5860621

DBOWNER         MSG_LOG                        2          0.00839630

DBOWNER         COUNTRY_PK                     1          0.00419815

DBOWNER         PARAMETER                      1          0.00419815

DBOWNER         PARAMETER_PK                   1          0.00419815

DBOWNER         MSG_LOG_IDX1                   1          0.00419815

6 rows selected

SQL>