2.查看保持池大小
SQL> show parameter keep;
NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
buffer_pool_keep                     string
control_file_record_keep_time        integer     7
db_keep_cache_size                   big integer 0
在没有设置保持池和回收池前，数据库只使用默认池作为缓冲池
3.查看当前库的数据块的缓冲池
SQL> select * from v$buffer_pool;
4.查看一个表的大小
SQL> select * from dba_segments where segment_name='T_OBJ_TOTAL' ;
5.分析表
SQL> analyze table dump_test.t_obj_total compute statistics;
6.设置保持池大小
SQL> alter system set db_keep_cache_size=10M;
7.表从默认池移到保持池
SQL> alter table dump_test.t_obj_total storage(buffer_pool keep);
8.查看表的缓冲池
SQL> select * from dba_tables where wner = 'DUMP_TEST';
9.将表还原为默认池
SQL> alter table dump_test.t_obj_total storage(buffer_pool default);
10.回收保持池中的内存
SQL> alter system set db_keep_cache_size=0;

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