初學Oracle的朋友肯定對Controlfile控制文件中到底記錄了何種的信息記錄而感到好奇，實際上我們可以通過一個視圖v$controlfile_record_section來了解控制文件的信息片段： ?

SQL> select type, record_size, records_total from v$controlfile_record_section;TYPE                         RECORD_SIZE RECORDS_TOTAL
---------------------------- ----------- -------------
DATABASE                             316             1
CKPT PROGRESS                       8180            35
REDO THREAD                          256            32
REDO LOG                              72           192
DATAFILE                             520          1024
FILENAME                             524          4674
TABLESPACE                            68          1024
TEMPORARY FILENAME                    56          1024
RMAN CONFIGURATION                  1108            50
LOG HISTORY                           56           292
OFFLINE RANGE                        200          1063
ARCHIVED LOG                         584           136
BACKUP SET                            40          1227
BACKUP PIECE                         736          1000
BACKUP DATAFILE                      200          1063
BACKUP REDOLOG                        76           430
DATAFILE COPY                        736          1000
BACKUP CORRUPTION                     44          1115
COPY CORRUPTION                       40          1227
DELETED OBJECT                        20           818
PROXY COPY                           928          1004
BACKUP SPFILE                        124           131
DATABASE INCARNATION                  56           292
FLASHBACK LOG                         84          2048
RECOVERY DESTINATION                 180             1
INSTANCE SPACE RESERVATION            28          1055
REMOVABLE RECOVERY FILES              32          1000
RMAN STATUS                          116           141
THREAD INSTANCE NAME MAPPING          80            32
MTTR                                 100            32
DATAFILE HISTORY                     568            57
STANDBY DATABASE MATRIX              400            31
GUARANTEED RESTORE POINT             212          2048
RESTORE POINT                        212          2083
DATABASE BLOCK CORRUPTION             80          8384
ACM OPERATION                        104            64
FOREIGN ARCHIVED LOG                 604          1002v$controlfile_record_section 的數據實際來源于X$KCCRS內部表v$controlfile_record_section 視圖的定義select inst_id,decode(indx,0,'DATABASE',1,'CKPT PROGRESS',2,'REDO THREAD',3,'REDO LOG',4,'DATAFILE',5,'FILENAME',6,'TABLESPACE',7,'TEMPORARY FILENAME',8,'RMAN CONFIGURATION',9,'LOG HISTORY',10,'OFFLINE RANGE',11,'ARCHIVED LOG',12,'BACKUP SET',13,'BACKUP PIECE',14,'BACKUP DATAFILE',15,'BACKUP REDOLOG',16,'DATAFILE COPY',17,'BACKUP CORRUPTION',18,'COPY CORRUPTION',19,'DELETED OBJECT',20,'PROXY COPY',21,'BACKUP SPFILE',23,'DATABASE INCARNATION',24,'FLASHBACK LOG',25,'RECOVERY DESTINATION',26,'INSTANCE SPACE RESERVATION',27,'REMOVABLE RECOVERY FILES',28,'RMAN STATUS',29,'THREAD INSTANCE NAME MAPPING',30,'MTTR',31,'DATAFILE HISTORY',32,'STANDBY DATABASE MATRIX',33,'GUARANTEED RESTORE POINT',34,'RESTORE POINT',35,'DATABASE BLOCK CORRUPTION',36,'ACM OPERATION',37,'FOREIGN ARCHIVED LOG','UNKNOWN'),rsrsz,rsnum,rsnus,rsiol,rsilw,rsrlwfrom x$kccrswhere indx not in (22)

? 下表羅列出了controlfile 控制文件可能出現的數據庫各類文件的記錄，如數據文件記錄、文件名記錄、表空間記錄等： ?

31. Datafile History Record: (1 per dropped datafile)

本文轉自maclean_007 51CTO博客，原文鏈接:
http://blog.51cto.com/maclean/1278172