[Oracle]查看数据是否被移入 DataBuffer 的方法

查看数据是否被移入 DataBuffer 的方法：

例如：表名为 tabxxx， 用户为U2:

SQL> grant dba to u2 identified by u2;
SQL> conn u2/u2
SQL>
SQL> create table tabxxx as select * from dba_objects;
SQL> select count(*) from tabxxx;

  COUNT(*)
----------
     69263
SQL>

SQL> select o.owner,o.object_name,o.object_type,s.buffer_pool,count(*) buffers
    from dba_objects o,v$bh b,dba_segments s
    where b.objd=o.data_object_id
    and o.owner = 'U2'
    and o.object_name like '%XXX%'
    and o.object_name=s.segment_name
    and o.object_type=s.segment_type
    group by o.owner,o.object_name,o.object_type,o.status,s.buffer_pool
    order by buffers;

OWNER
------------------------------------------------------------------------------------------
OBJECT_NAME
--------------------------------------------------------------------------------------------
OBJECT_TYPE                                               BUFFER_POOL              BUFFERS
--------------------------------------------------------- --------------------- ----------
U2
TABXXX
TABLE                                                     DEFAULT                     1045

SQL>