Regarding table size

Question

Hi,
I have a table whose script given below :
CREATE TABLE UII_SERVICE_INSTANCE
SERVICE_INSTANCE_ID VARCHAR2(30 BYTE) NOT NULL,
VERSION_NO VARCHAR2(10 BYTE),
STATUS VARCHAR2(20 BYTE),
NW_INSTANCE_ID VARCHAR2(25 BYTE),
CUSTOMER_ID VARCHAR2(25 BYTE),
DIRECTORY_NO VARCHAR2(20 BYTE),
INSTANCE_NAME VARCHAR2(80 BYTE),
PRODUCT_CODE VARCHAR2(255 BYTE),
INSTALL_DATE DATE,
CREATED_BY VARCHAR2(10 BYTE) NOT NULL,
CEASE_DATE DATE,
ODS_CREATE_DATE DATE NOT NULL,
MODIFY_DATE DATE,
LAST_UPDATED_BY VARCHAR2(10 BYTE) NOT NULL,
SHIP_DATE DATE,
ODS_LAST_UPDATE_DATE DATE NOT NULL,
WARRANTY_DATE DATE,
WATERMARK NUMBER(38) NOT NULL,
A_END_LOCATION VARCHAR2(28 BYTE),
B_END_LOCATION VARCHAR2(28 BYTE),
A_END_EXCHANGE_ID VARCHAR2(11 BYTE),
B_END_EXCHANGE_ID VARCHAR2(11 BYTE),
BIT_RATE VARCHAR2(10 BYTE),
MAINTENANCE_CLASS VARCHAR2(17 BYTE),
PRODUCT_TECHNOLOGY VARCHAR2(20 BYTE),
WARRANTY_STATUS VARCHAR2(30 BYTE),
SERVICE_TYPE VARCHAR2(6 BYTE),
SPACE_SITE_PART_KEY NUMBER(10),
SITE_ID VARCHAR2(80 BYTE)
TABLESPACE APPL_DATA
NOLOGGING
NOCOMPRESS
NOCACHE
NOPARALLEL
NOMONITORING;
CREATE INDEX UII_I_SERVICE_INSTANCE_FK1 ON UII_SERVICE_INSTANCE
(NW_INSTANCE_ID)
NOLOGGING
TABLESPACE APPL_DATA
NOPARALLEL;
CREATE INDEX UII_I_SERVICE_INSTANCE_FK2 ON UII_SERVICE_INSTANCE
(CUSTOMER_ID)
NOLOGGING
TABLESPACE APPL_DATA
NOPARALLEL;
CREATE INDEX UII_I_SERVICE_INSTANCE_FK3 ON UII_SERVICE_INSTANCE
(B_END_EXCHANGE_ID)
NOLOGGING
TABLESPACE APPL_DATA
NOPARALLEL;
CREATE INDEX UII_I_SERVICE_INSTANCE_FK4 ON UII_SERVICE_INSTANCE
(A_END_EXCHANGE_ID)
NOLOGGING
TABLESPACE APPL_DATA
NOPARALLEL;
CREATE INDEX UII_I_SERVICE_INSTANCE_FK5 ON UII_SERVICE_INSTANCE
(SITE_ID)
NOLOGGING
TABLESPACE APPL_DATA
NOPARALLEL;
CREATE UNIQUE INDEX UII_SERVICE_INSTANCE_PK ON UII_SERVICE_INSTANCE
(SERVICE_INSTANCE_ID, VERSION_NO)
NOLOGGING
TABLESPACE APPL_DATA
NOPARALLEL;
ALTER TABLE UII_SERVICE_INSTANCE ADD (
CONSTRAINT UII_SERVICE_INSTANCE_PK
PRIMARY KEY
(SERVICE_INSTANCE_ID, VERSION_NO)
USING INDEX
TABLESPACE APPL_DATA);
Now I have issued the follwoing sqls :
1)TRUNCATE TABLE UII_ODS_OWNER_DEV_21C.UII_SERVICE_INSTANCE DROP STORAGE;
2)ANALYZE TABLE UII_ODS_OWNER_DEV_21C.UII_SERVICE_INSTANCE estimate STATISTICS;
3)analyze table UII_ODS_OWNER_DEV_21C.UII_SERVICE_INSTANCE compute statistics for table for all indexed columns for all indexes;
But still the size of the table from dba_segments showing around 2.8 GB.
SELECT SEGMENT_NAME , SUM(BYTES)/(1024*1024)
FROM DBA_SEGMENTS
WHERE OWNER='UII_ODS_OWNER_DEV_21C'
GROUP BY SEGMENT_NAME
ORDER BY 2 DESC;
SEGMENT_NAME SUM(BYTES)/(1024*1024)
UII_SERVICE_INSTANCE 2816
Can any body please explain the case?
Thanks in advance,
Koushik Chandra

Answer 1

Hi,
Thanks for ur reply.
My database version is also 9.2.0.6
and the output of the sql ;
SELECT initial_extent, next_extent, min_extents, extent_management, allocation_type
FROM dba_tablespaces
WHERE tablespace_name = 'APPL_DATA';
initial_extent next_extent min_extents extent_management allocation_type
65536 1 LOCAL SYSTEM
As I was not aware of the bug, so I have already executed some sqls.
First I have issued the sql below to find the objectid of the table below :
select * from dba_objects WHERE OWNER='UII_ODS_OWNER_DEV_21C' and object_name
like 'UII_SERVICE_INSTANCE%';
then issued the following statement to find the ts_number :
select * from sys.sys_objects where object_id = 58585;
Then I have issued the following sql to find records of that ts_number :
select * from sys.seg$ where ts#=9;
Then I have executed the following block :
begin
update sys.seg$ set blocks=8 where ts#=9 and blocks > 8;
commit;
end;
After this updation the size shown 0.0625 MB from DBA_SEGMENTS.
But I want know will this updation effect badly in my database? As I am directly updating the data dictionary.
Please provide your comments on this issue.
Thanks,
Koushik