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$$ LOB PARTITION SECUREFILE SYS_LOB_P200 SECUREFILES
TICKETS TABLE PARTITION ASSM STS_PENDING USERS
TICKETS TABLE PARTITION ASSM STS_OTHER USERS
TICKETS TABLE PARTITION ASSM STS_OPEN USERS
TICKETS TABLE PARTITION ASSM STS_CLOSED USERS
TICKETS_PK_IDX INDEX ASSM USERS
BasicFile和SecureFile LOB元数据
(来自DBA_LOBS)
Stored Encryp- Compre- DeDupli- Secure Parti-
Table Column Segment Tablespace Logging Cacheing In Row tion ssion cation File? tioned
-------------- ---------- -------------------------- ------------ -------- ---------- ------- ------- ------- -------- ------- -------
SECURE_TICKETS DOCUMENT SYS_LOB0000072118C00005$$ 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分区LOB默认设置
(来自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分区
(来自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
这是另一个Oracle古老支持包，它的SPACE_USAGE存储过程提供关于BasicFile和SecureFile LOB的空间利用率，我在TRBTKT.PKG_SECUREFILES包中引入了两个存储过程：CALC_SPACE_BASICFILES和CALC_SPACE_SECUREFILES。但遗憾的是，这个功能只能在启用了自动段空间管理(ASSM)的表空间上使用，而且，它也不会考虑任何BasicFile LOB块的空间利用率，在清单5中，我对表TRBTKT.TICKETS和TRBTKT.SECURE_TICKETS分别调用了这些存储过程，并返回了相应的输出。
清单5 确定BasicFile和SecureFile LOB的空间利用率
SET SERVEROUTPUT ON
-- BasicFile存储利用率:
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存储利用率:
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属性
当我创建TRBTKT.SECURE_TICKETS表时，你可能注意到我为每个LOB列在它们对应的分区中执行压缩和重复删除，重要的是我还使用了ALTER TABLE语句进行修正，另外，如果需要的话，我还可以在每个LOB独立的分区上应用改变到SecureFile LOB。清单6中的代码显示了4个修改TRBTKT.TICKETS表的SecureFile LOB属性的例子，注意这个表现在已经用清单3中的代码和TRBTKT.SECURE_TICKETS表执行了交换，我也从DBA_PART_LOBS创建了一个报告显示在修改这些LOB属性前后的状态，结果输出如报告2所示。
清单6 管理SecureFile LOB属性
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.
报告2 修改许多SecureFile LOB后查询DBA_LOB_PARTITIONS返回的结果
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
最后，请记住任何对LOB属性进行修改都只会影响到新创建的LOB或新修改的LOB，例如，将列TRBTKT.SECURE_TICKETS.SCRNIMG的压缩方法从COMPRESS修改为NOCOMPRESS不会影响到现有的LOB条目。
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