SYS_IL0000072118C00005$$ INDEX PARTITION ASSM SYS_IL_P177 BASICFILES
SYS_IL0000072118C00006$$ INDEX PARTITION ASSM SYS_IL_P185 BASICFILES
SYS_IL0000072118C00006$$ INDEX PARTITION ASSM SYS_IL_P188 BASICFILES
SYS_IL0000072118C00006$$ INDEX PARTITION ASSM SYS_IL_P187 BASICFILES
SYS_IL0000072118C00006$$ INDEX PARTITION ASSM SYS_IL_P186 BASICFILES
SYS_IL0000072144C00005$$ INDEX PARTITION ASSM SYS_IL_P194 SECUREFILES
SYS_IL0000072144C00005$$ INDEX PARTITION ASSM SYS_IL_P193 SECUREFILES
SYS_IL0000072144C00005$$ INDEX PARTITION ASSM SYS_IL_P195 SECUREFILES
SYS_IL0000072144C00005$$ INDEX PARTITION ASSM SYS_IL_P196 SECUREFILES
SYS_IL0000072144C00006$$ INDEX PARTITION ASSM SYS_IL_P204 SECUREFILES
SYS_IL0000072144C00006$$ INDEX PARTITION ASSM SYS_IL_P203 SECUREFILES
SYS_IL0000072144C00006$$ INDEX PARTITION ASSM SYS_IL_P202 SECUREFILES
SYS_IL0000072144C00006$$ INDEX PARTITION ASSM SYS_IL_P201 SECUREFILES
SYS_LOB0000072118C00005$$ LOB PARTITION ASSM SYS_LOB_P173 BASICFILES
SYS_LOB0000072118C00005$$ LOB PARTITION ASSM SYS_LOB_P176 BASICFILES
SYS_LOB0000072118C00005$$ LOB PARTITION ASSM SYS_LOB_P175 BASICFILES
SYS_LOB0000072118C00005$$ LOB PARTITION ASSM SYS_LOB_P174 BASICFILES
SYS_LOB0000072118C00006$$ LOB PARTITION ASSM SYS_LOB_P184 BASICFILES
SYS_LOB0000072118C00006$$ LOB PARTITION ASSM SYS_LOB_P183 BASICFILES
SYS_LOB0000072118C00006$$ LOB PARTITION ASSM SYS_LOB_P181 BASICFILES
SYS_LOB0000072118C00006$$ LOB PARTITION ASSM SYS_LOB_P182 BASICFILES
SYS_LOB0000072144C00005$$ LOB PARTITION SECUREFILE SYS_LOB_P191 SECUREFILES
SYS_LOB0000072144C00005$$ LOB PARTITION SECUREFILE SYS_LOB_P192 SECUREFILES
SYS_LOB0000072144C00005$$ LOB PARTITION SECUREFILE SYS_LOB_P189 SECUREFILES
SYS_LOB0000072144C00005$$ LOB PARTITION SECUREFILE SYS_LOB_P190 SECUREFILES
SYS_LOB0000072144C00006$$ LOB PARTITION SECUREFILE SYS_LOB_P198 SECUREFILES
SYS_LOB0000072144C00006$$ LOB PARTITION SECUREFILE SYS_LOB_P199 SECUREFILES
SYS_LOB0000072144C00006$$ LOB PARTITION SECUREFILE SYS_LOB_P197 SECUREFILES
SYS_LOB0000072144C00006$$ LOB PARTITION SECUREFILE SYS_LOB_P200 SECUREFILES
TICKETS TABLE PARTITION ASSM STS_PENDING USERS
TICKETS TABLE PARTITION ASSM STS_OTHER USERS
TICKETS TABLE PARTITION ASSM STS_OPEN USERS
TICKETS TABLE PARTITION ASSM STS_CLOSED USERS
TICKETS_PK_IDX INDEX ASSM USERS
BasicFile和SecureFile LOB元數據
(來自DBA_LOBS)
Stored Encryp- Compre- DeDupli- Secure Parti-
Table Column Segment Tablespace Logging Cacheing In Row tion ssion cation File? tioned
-------------- ---------- -------------------------- ------------ -------- ---------- ------- ------- ------- -------- ------- -------
SECURE_TICKETS DOCUMENT SYS_LOB0000072118C00005$$ BASICFILES NONE NO YES NONE NONE NONE NO YES
SECURE_TICKETS SCRNIMG SYS_LOB0000072118C00006$$ BASICFILES NONE NO YES NONE NONE NONE NO YES
TICKETS DOCUMENT SYS_LOB0000072144C00005$$ SECUREFILES NONE YES NO NO NO NO YES YES
TICKETS SCRNIMG SYS_LOB0000072144C00006$$ SECUREFILES NONE CACHEREADS NO NO NO NO YES YES
BasicFile和SecureFile分區LOB默認設置
(來自DBA_PART_LOBS)
Table Column Cached Tablespace SecureFile Compressed DeDuplicated Encrypted
----- ------------ ------------ ------------ ------------ ------------ ------------ ------------
SECURE_TICKETS DOCUMENT NO BASICFILES NO NONE NONE NONE
SECURE_TICKETS SCRNIMG NO BASICFILES NO NONE NONE NONE
TICKETS DOCUMENT YES SECUREFILES YES NO NO NO
TICKETS SCRNIMG CACHEREADS SECUREFILES YES NO NO NO
BasicFile和SecureFile LOB分區
(來自DBA_LOB_PARTITIONS)
Stored in Stored DeDupli-
Table Column Partition Cacheing In Row Encrypted Compressed cated SecureFile
---- ------------ ------------ ---------- ---------- ---------- ---------- ---------- ----------
SECURE_TICKETS DOCUMENT STS_OTHER NO YES NONE NONE NONE NO
SECURE_TICKETS DOCUMENT STS_CLOSED NO YES NONE NONE NONE NO
SECURE_TICKETS DOCUMENT STS_OPEN NO YES NONE NONE NONE NO
SECURE_TICKETS DOCUMENT STS_PENDING NO YES NONE NONE NONE NO
SECURE_TICKETS SCRNIMG STS_OTHER NO YES NONE NONE NONE NO
SECURE_TICKETS SCRNIMG STS_CLOSED NO YES NONE NONE NONE NO
SECURE_TICKETS SCRNIMG STS_PENDING NO YES NONE NONE NONE NO
SECURE_TICKETS SCRNIMG STS_OPEN NO YES NONE NONE NONE NO
TICKETS DOCUMENT STS_OTHER YES NO NO HIGH LOB YES
TICKETS DOCUMENT STS_PENDING YES NO NO NO NO YES
TICKETS DOCUMENT STS_CLOSED YES NO NO MEDIUM LOB YES
TICKETS DOCUMENT STS_OPEN YES NO NO NO NO YES
TICKETS SCRNIMG STS_PENDING CACHEREADS NO NO MEDIUM LOB YES
TICKETS SCRNIMG STS_OPEN CACHEREADS NO NO MEDIUM NO YES
TICKETS SCRNIMG STS_CLOSED CACHEREADS NO NO HIGH LOB YES
TICKETS SCRNIMG STS_OTHER CACHEREADS NO NO HIGH LOB YES
2、DBMS_SPACE
這是另一個Oracle古老支持包，它的SPACE_USAGE存儲過程提供關於BasicFile和SecureFile LOB的空間利用率，我在TRBTKT.PKG_SECUREFILES包中引入了兩個存儲過程：CALC_SPACE_BASICFILES和CALC_SPACE_SECUREFILES。但遺憾的是，這個功能只能在啓用了自動段空間管理(ASSM)的表空間上使用，而且，它也不會考慮任何BasicFile LOB塊的空間利用率，在清單5中，我對錶TRBTKT.TICKETS和TRBTKT.SECURE_TICKETS分別調用了這些存儲過程，並返回了相應的輸出。
清單5 確定BasicFile和SecureFile LOB的空間利用率
SET SERVEROUTPUT ON
-- BasicFile存儲利用率:
BEGIN
trbtkt.pkg_securefiles.calc_space_basicfiles (
ownname => 'TRBTKT'
,tabname => 'SECURE_TICKETS'
,colname => 'DOCUMENT'
,partname => 'STS_OPEN'
);
trbtkt.pkg_securefiles.calc_space_basicfiles (
ownname => 'TRBTKT'
,tabname => 'SECURE_TICKETS'
,colname => 'DOCUMENT'
,partname => 'STS_PENDING'
);
trbtkt.pkg_securefiles.calc_space_basicfiles (
ownname => 'TRBTKT'
,tabname => 'SECURE_TICKETS'
,colname => 'DOCUMENT'
,partname => 'STS_CLOSED'
);
trbtkt.pkg_securefiles.calc_space_basicfiles (
ownname => 'TRBTKT'
,tabname => 'SECURE_TICKETS'
,colname => 'DOCUMENT'
,partname => 'STS_OTHER'
);
trbtkt.pkg_securefiles.calc_space_basicfiles (
ownname => 'TRBTKT'
,tabname => 'SECURE_TICKETS'
,colname => 'SCRNIMG'
,partname => 'STS_OPEN'
);
trbtkt.pkg_securefiles.calc_space_basicfiles (
ownname => 'TRBTKT'
,tabname => 'SECURE_TICKETS'
,colname => 'SCRNIMG'
,partname => 'STS_PENDING'
);
trbtkt.pkg_securefiles.calc_space_basicfiles (
ownname => 'TRBTKT'
,tabname => 'SECURE_TICKETS'
,colname => 'SCRNIMG'
,partname => 'STS_CLOSED'
);
trbtkt.pkg_securefiles.calc_space_basicfiles (
ownname => 'TRBTKT'
,tabname => 'SECURE_TICKETS'
,colname => 'SCRNIMG'
,partname => 'STS_OTHER'
);
END;
/
============================================================
Space Usage for BasicFile LOB TRBTKT.SECURE_TICKETS.DOCUMENT
Partition Name: STS_OPEN
------------------------------------------------------------
Full Blocks: 123 KB: .96
Unformatted Blocks: 379 KB: 2.96
Total Blocks: 123 Total KB: .96
============================================================
============================================================
Space Usage for BasicFile LOB TRBTKT.SECURE_TICKETS.DOCUMENT
Partition Name: STS_PENDING
------------------------------------------------------------
Full Blocks: 20 KB: .16
Unformatted Blocks: 482 KB: 3.77
Total Blocks: 20 Total KB: .16
============================================================
============================================================
Space Usage for BasicFile LOB TRBTKT.SECURE_TICKETS.DOCUMENT
Partition Name: STS_CLOSED
------------------------------------------------------------
Full Blocks: 37 KB: .29
Unformatted Blocks: 465 KB: 3.63
Total Blocks: 37 Total KB: .29
============================================================
============================================================
Space Usage for BasicFile LOB TRBTKT.SECURE_TICKETS.DOCUMENT
Partition Name: STS_OTHER
------------------------------------------------------------
Full Blocks: 0 KB: 0
Unformatted Blocks: 0 KB: 0
Total Blocks: 0 Total KB: 0
============================================================
============================================================
Space Usage for BasicFile LOB TRBTKT.SECURE_TICKETS.SCRNIMG
Partition Name: STS_OPEN
------------------------------------------------------------
Full Blocks: 420 KB: 3.28
Unformatted Blocks: 82 KB: .64
Total Blocks: 420 Total KB: 3.28
============================================================
============================================================
Space Usage for BasicFile LOB TRBTKT.SECURE_TICKETS.SCRNIMG
Partition Name: STS_PENDING
------------------------------------------------------------
Full Blocks: 66 KB: .52
Unformatted Blocks: 436 KB: 3.41
Total Blocks: 66 Total KB: .52
============================================================
============================================================
Space Usage for BasicFile LOB TRBTKT.SECURE_TICKETS.SCRNIMG
Partition Name: STS_CLOSED
------------------------------------------------------------
Full Blocks: 144 KB: 1.13
Unformatted Blocks: 358 KB: 2.8
Total Blocks: 144 Total KB: 1.13
============================================================
============================================================
Space Usage for BasicFile LOB TRBTKT.SECURE_TICKETS.SCRNIMG
Partition Name: STS_OTHER
------------------------------------------------------------
Full Blocks: 0 KB: 0
Unformatted Blocks: 0 KB: 0
Total Blocks: 0 Total KB: 0
============================================================
-- SecureFile存儲利用率:
BEGIN
trbtkt.pkg_securefiles.calc_space_securefiles (
ownname => 'TRBTKT'
,tabname => 'TICKETS'
,colname => 'DOCUMENT'
,partname => 'STS_OPEN'
);
trbtkt.pkg_securefiles.calc_space_securefiles (
ownname => 'TRBTKT'
,tabname => 'TICKETS'
,colname => 'DOCUMENT'
,partname => 'STS_PENDING'
);
trbtkt.pkg_securefiles.calc_space_securefiles (
ownname => 'TRBTKT'
,tabname => 'TICKETS'
,colname => 'DOCUMENT'
,partname => 'STS_CLOSED'
);
trbtkt.pkg_securefiles.calc_space_securefiles (
ownname => 'TRBTKT'
,tabname => 'TICKETS'
,colname => 'DOCUMENT'
,partname => 'STS_OTHER'
);
trbtkt.pkg_securefiles.calc_space_securefiles (
ownname => 'TRBTKT'
,tabname => 'TICKETS'
,colname => 'SCRNIMG'
,partname => 'STS_OPEN'
);
trbtkt.pkg_securefiles.calc_space_securefiles (
ownname => 'TRBTKT'
,tabname => 'TICKETS'
,colname => 'SCRNIMG'
,partname => 'STS_PENDING'
);
trbtkt.pkg_securefiles.calc_space_securefiles (
ownname => 'TRBTKT'
,tabname => 'TICKETS'
,colname => 'SCRNIMG'
,partname => 'STS_CLOSED'
);
trbtkt.pkg_securefiles.calc_space_securefiles (
ownname => 'TRBTKT'
,tabname => 'TICKETS'
,colname => 'SCRNIMG'
,partname => 'STS_OTHER'
);
END;
/
============================================================
Space Usage for SecureFile LOB TRBTKT.TICKETS.DOCUMENT
Partition Name: STS_OPEN
------------------------------------------------------------
Segment Blocks: 1024 KB: 8192
Used Blocks: 124 KB: 992
Expired Blocks: 882 KB: 7056
Unexpired Blocks: 0 KB: 0
============================================================
============================================================
Space Usage for SecureFile LOB TRBTKT.TICKETS.DOCUMENT
Partition Name: STS_PENDING
------------------------------------------------------------
Segment Blocks: 1024 KB: 8192
Used Blocks: 21 KB: 168
Expired Blocks: 985 KB: 7880
Unexpired Blocks: 0 KB: 0
============================================================
============================================================
Space Usage for SecureFile LOB TRBTKT.TICKETS.DOCUMENT
Partition Name: STS_CLOSED
------------------------------------------------------------
Segment Blocks: 1024 KB: 8192
Used Blocks: 13 KB: 104
Expired Blocks: 993 KB: 7944
Unexpired Blocks: 0 KB: 0
============================================================
============================================================
Space Usage for SecureFile LOB TRBTKT.TICKETS.DOCUMENT
Partition Name: STS_OTHER
------------------------------------------------------------
Segment Blocks: 512 KB: 4096
Used Blocks: 501 KB: 4008
Expired Blocks: 0 KB: 0
Unexpired Blocks: 0 KB: 0
============================================================
============================================================
Space Usage for SecureFile LOB TRBTKT.TICKETS.SCRNIMG
Partition Name: STS_OPEN
------------------------------------------------------------
Segment Blocks: 2560 KB: 20480
Used Blocks: 405 KB: 3240
Expired Blocks: 2134 KB: 17072
Unexpired Blocks: 0 KB: 0
============================================================
============================================================
Space Usage for SecureFile LOB TRBTKT.TICKETS.SCRNIMG
Partition Name: STS_PENDING
------------------------------------------------------------
Segment Blocks: 1024 KB: 8192
Used Blocks: 62 KB: 496
Expired Blocks: 944 KB: 7552
Unexpired Blocks: 0 KB: 0
============================================================
============================================================
Space Usage for SecureFile LOB TRBTKT.TICKETS.SCRNIMG
Partition Name: STS_CLOSED
------------------------------------------------------------
Segment Blocks: 1024 KB: 8192
Used Blocks: 142 KB: 1136
Expired Blocks: 864 KB: 6912
Unexpired Blocks: 0 KB: 0
============================================================
============================================================
Space Usage for SecureFile LOB TRBTKT.TICKETS.SCRNIMG
Partition Name: STS_OTHER
------------------------------------------------------------
Segment Blocks: 512 KB: 4096
Used Blocks: 501 KB: 4008
Expired Blocks: 0 KB: 0
Unexpired Blocks: 0 KB: 0
============================================================
SET SERVEROUTPUT ON
修改SecureFile屬性
當我創建TRBTKT.SECURE_TICKETS表時，你可能注意到我爲每個LOB列在它們對應的分區中執行壓縮和重複刪除，重要的是我還使用了ALTER TABLE語句進行修正，另外，如果需要的話，我還可以在每個LOB獨立的分區上應用改變到SecureFile LOB。清單6中的代碼顯示了4個修改TRBTKT.TICKETS表的SecureFile LOB屬性的例子，注意這個表現在已經用清單3中的代碼和TRBTKT.SECURE_TICKETS表執行了交換，我也從DBA_PART_LOBS創建了一個報告顯示在修改這些LOB屬性前後的狀態，結果輸出如報告2所示。
清單6 管理SecureFile LOB屬性
SQL> ALTER TABLE TRBTKT.TICKETS
SQL> MODIFY LOB(DOCUMENT) (NOCOMPRESS);
Table altered.
SQL> ALTER TABLE TRBTKT.TICKETS
SQL> MODIFY LOB(SCRNIMG) (KEEP_DUPLICATES);
Table altered.
SQL> ALTER TABLE TRBTKT.TICKETS
SQL> MODIFY PARTITION STS_PENDING LOB(SCRNIMG) (COMPRESS HIGH);
Table altered.
SQL> ALTER TABLE TRBTKT.TICKETS
SQL> MODIFY PARTITION STS_PENDING LOB(DOCUMENT) (DEDUPLICATE);
Table altered.
報告2 修改許多SecureFile LOB後查詢DBA_LOB_PARTITIONS返回的結果
BasicFile and SecureFile LOB Partitions
(from DBA_LOB_PARTITIONS)
Stored in Stored DeDupli-
Table Column Partition Cacheing In Row Encrypted Compressed cated SecureFile
---------------- ------------ ------------ ---------- ---------- ---------- ---------- --------
SECURE_TICKETS DOCUMENT STS_OTHER NO YES NONE NONE NONE NO
SECURE_TICKETS DOCUMENT STS_CLOSED NO YES NONE NONE NONE NO
SECURE_TICKETS DOCUMENT STS_OPEN NO YES NONE NONE NONE NO
SECURE_TICKETS DOCUMENT STS_PENDING NO YES NONE NONE NONE NO
SECURE_TICKETS SCRNIMG STS_OTHER NO YES NONE NONE NONE NO
SECURE_TICKETS SCRNIMG STS_CLOSED NO YES NONE NONE NONE NO
SECURE_TICKETS SCRNIMG STS_PENDING NO YES NONE NONE NONE NO
SECURE_TICKETS SCRNIMG STS_OPEN NO YES NONE NONE NONE NO
TICKETS DOCUMENT STS_OTHER YES NO NO NO LOB YES
TICKETS DOCUMENT STS_PENDING YES NO NO NO LOB YES
TICKETS DOCUMENT STS_CLOSED YES NO NO NO LOB YES
TICKETS DOCUMENT STS_OPEN YES NO NO NO NO YES
TICKETS SCRNIMG STS_PENDING CACHEREADS NO NO HIGH NO YES
TICKETS SCRNIMG STS_OPEN CACHEREADS NO NO MEDIUM NO YES
TICKETS SCRNIMG STS_CLOSED CACHEREADS NO NO HIGH NO YES
TICKETS SCRNIMG STS_OTHER CACHEREADS NO NO HIGH NO YES
最後，請記住任何對LOB屬性進行修改都只會影響到新創建的LOB或新修改的LOB，例如，將列TRBTKT.SECURE_TICKETS.SCRNIMG的壓縮方法從COMPRESS修改爲NOCOMPRESS不會影響到現有的LOB條目。