数据库增长异常、怎样查看数据表的实际大小

[zhqp001]

单位一个Oracle 11g的生产数据库，之前一直很稳定，用了一年多，表空间达到700多MB。最近半个月不知道怎么回事，业务没发生大的变化，但是数据库增长迅速，表空间已经到了2G多。应该怎样查看数据库中各个对象的实际大小呢？或者怎样检查什么地方有异常？

[bfc99]

1、空间增长后，数据库不会自动收缩。 另外，即使原来占用表空间的对象被删除(drop)，从表空间的角度看，空间并不减少。但在表空间内，这部分空间可以被其它对象所使用。如果原来占用表空间的对象中的数据被delete,那么该对象所占用的空间也是不会减少，而且这些被删除数据占用的空间不能被其它对象所使用，而只能由该对象继续使用。 2、对于你的这种情况，建议首先通过dba_segments视图，查找出占用相应表空间最多的前10个对象。然后通过show_space存储过程，分别查看各个对象的占用空间的使用情况。show_space存储过程代码附后。 3、以下链接中有使用show_space的实际样例供参考。 http://www.blogjava.net/decode360/archive/2009/07/14/287767.html

[bfc99]

procedure SHOW_SPACE(P_SEGNAME IN VARCHAR2, P_OWNER IN VARCHAR2 DEFAULT USER, P_TYPE IN VARCHAR2 DEFAULT 'TABLE', P_PARTITION IN VARCHAR2 DEFAULT NULL) -- THIS PROCEDURE USES AUTHID CURRENT USER SO IT CAN QUERY DBA_* -- VIEWS USING PRIVILEGES FROM A ROLE AND SO IT CAN BE INSTALLED -- ONCE PER DATABASE, INSTEAD OF ONCE PER USER WHO WANTED TO USE IT. AUTHID CURRENT_USER AS L_FREE_BLKS NUMBER; L_TOTAL_BLOCKS NUMBER; L_TOTAL_BYTES NUMBER; L_UNUSED_BLOCKS NUMBER; L_UNUSED_BYTES NUMBER; L_LASTUSEDEXTFILEID NUMBER; L_LASTUSEDEXTBLOCKID NUMBER; L_LAST_USED_BLOCK NUMBER; L_SEGMENT_SPACE_MGMT VARCHAR2(255); L_UNFORMATTED_BLOCKS NUMBER; L_UNFORMATTED_BYTES NUMBER; L_FS1_BLOCKS NUMBER; L_FS1_BYTES NUMBER; L_FS2_BLOCKS NUMBER; L_FS2_BYTES NUMBER; L_FS3_BLOCKS NUMBER; L_FS3_BYTES NUMBER; L_FS4_BLOCKS NUMBER; L_FS4_BYTES NUMBER; L_FULL_BLOCKS NUMBER; L_FULL_BYTES NUMBER; -- INLINE PROCEDURE TO PRINT OUT NUMBERS NICELY FORMATTED -- WITH A SIMPLE LABEL. PROCEDURE P(P_LABEL IN VARCHAR2, P_NUM IN NUMBER) IS BEGIN DBMS_OUTPUT.PUT_LINE(RPAD(P_LABEL, 40, '.') || TO_CHAR(P_NUM, '999,999,999,999')); END; BEGIN -- THIS QUERY IS EXECUTED DYNAMICALLY IN ORDER TO ALLOW THIS PROCEDURE -- TO BE CREATED BY A USER WHO HAS ACCESS TO DBA_SEGMENTS/TABLESPACES -- VIA A ROLE AS IS CUSTOMARY. -- NOTE: AT RUNTIME, THE INVOKER MUST HAVE ACCESS TO THESE TWO -- VIEWS! -- THIS QUERY DETERMINES IF THE OBJECT IS AN ASSM OBJECT OR NOT. BEGIN EXECUTE IMMEDIATE 'SELECT TS.SEGMENT_SPACE_MANAGEMENT FROM DBA_SEGMENTS SEG, DBA_TABLESPACES TS WHERE SEG.SEGMENT_NAME = :P_SEGNAME AND (:P_PARTITION IS NULL OR SEG.PARTITION_NAME = :P_PARTITION) AND SEG.OWNER = :P_OWNER AND SEG.TABLESPACE_NAME = TS.TABLESPACE_NAME' INTO L_SEGMENT_SPACE_MGMT USING P_SEGNAME, P_PARTITION, P_PARTITION, P_OWNER; EXCEPTION WHEN TOO_MANY_ROWS THEN DBMS_OUTPUT.PUT_LINE('THIS MUST BE A PARTITIONED TABLE, USE P_PARTITION => '); RETURN; END; -- IF THE OBJECT IS IN AN ASSM TABLESPACE, WE MUST USE THIS API -- CALL TO GET SPACE INFORMATION; ELSE WE USE THE FREE_BLOCKS -- API FOR THE USER MANAGED SEGMENTS. IF L_SEGMENT_SPACE_MGMT = 'AUTO' THEN DBMS_SPACE.SPACE_USAGE(P_OWNER, P_SEGNAME, P_TYPE, L_UNFORMATTED_BLOCKS, L_UNFORMATTED_BYTES, L_FS1_BLOCKS, L_FS1_BYTES, L_FS2_BLOCKS, L_FS2_BYTES, L_FS3_BLOCKS, L_FS3_BYTES, L_FS4_BLOCKS, L_FS4_BYTES, L_FULL_BLOCKS, L_FULL_BYTES, P_PARTITION); P('UNFORMATTED BLOCKS ', L_UNFORMATTED_BLOCKS); P('FS1 BLOCKS (0-25) ', L_FS1_BLOCKS); P('FS2 BLOCKS (25-50) ', L_FS2_BLOCKS); P('FS3 BLOCKS (50-75) ', L_FS3_BLOCKS); P('FS4 BLOCKS (75-100)', L_FS4_BLOCKS); P('FULL BLOCKS ', L_FULL_BLOCKS); ELSE DBMS_SPACE.FREE_BLOCKS(SEGMENT_OWNER => P_OWNER, SEGMENT_NAME => P_SEGNAME, SEGMENT_TYPE => P_TYPE, FREELIST_GROUP_ID => 0, FREE_BLKS => L_FREE_BLKS); P('FREE BLOCKS', L_FREE_BLKS); END IF; -- AND THEN THE UNUSED SPACE API CALL TO GET THE REST OF THE -- INFORMATION. DBMS_SPACE.UNUSED_SPACE(SEGMENT_OWNER => P_OWNER, SEGMENT_NAME => P_SEGNAME, SEGMENT_TYPE => P_TYPE, PARTITION_NAME => P_PARTITION, TOTAL_BLOCKS => L_TOTAL_BLOCKS, TOTAL_BYTES => L_TOTAL_BYTES, UNUSED_BLOCKS => L_UNUSED_BLOCKS, UNUSED_BYTES => L_UNUSED_BYTES, LAST_USED_EXTENT_FILE_ID => L_LASTUSEDEXTFILEID, LAST_USED_EXTENT_BLOCK_ID => L_LASTUSEDEXTBLOCKID, LAST_USED_BLOCK => L_LAST_USED_BLOCK); P('TOTAL BLOCKS', L_TOTAL_BLOCKS); P('TOTAL BYTES', L_TOTAL_BYTES); P('TOTAL MBYTES', TRUNC(L_TOTAL_BYTES / 1024 / 1024)); P('UNUSED BLOCKS', L_UNUSED_BLOCKS); P('UNUSED BYTES', L_UNUSED_BYTES); P('LAST USED EXT FILEID', L_LASTUSEDEXTFILEID); P('LAST USED EXT BLOCKID', L_LASTUSEDEXTBLOCKID); P('LAST USED BLOCK', L_LAST_USED_BLOCK); END;

[卖水果的net]

user_segments 查查这个。

[huangdh12]

select t.owner,t.segment_name,sum(t.bytes)/1024/1024 from dba_segments t group by t.owner,t.segment_name order by 3 desc 看看什么对象占用的空间最大，然后看看是正常的吗

[huangdh12]

另外， 11g 会执行自动统计，所以，你先对比看看，是什么数据文件大了很多