oracle dump

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1、DUMP出控制文件
alter system (session) set events 'immediate trace name controlf level 10'

（oracle 控制文件备份

1、将控制文件备份为二进制文件

SQL>alter database backup controlfile to 'i:\oracle\backup\control.bkp';

2、将控制文件备份为文本文件(备份到oracle\base\admin\sid\udump目录下的跟踪文件中，将在跟踪文件中生成一个SQL脚本)

SQL>alter database backup controlfile to trace;

3、通过spfile生成pfile文件备份控制文件

SQL>create pfile='/pfile_backup.ora' from spfile='/home/oracle/product/10.2.0/db_1/dbs/spfileSID.ora';

)

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2、DUMP出日志文件分析
alter system dump logfile logfilename;

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3、DUMP出日志文件头分析
alter session set events 'immediate trace name REDOHDR level 10'

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4、DUMP出LIBRARY CACHE
alter system (session) set events 'immediate trace name library_cache level 10'

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5、 DUMP出share_pool
alter system (session) set events 'immediate trace name heapdump level 10'

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6、DUMP出所有数据文件头
alter system (session) set events 'immediate trace name file_hdrs level 10';

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7、DUMP出数据文件（只能是alter system）

alter system dump datafile n block m
如
select file_id,block_id,blocks from dba_extents where segment_name='EMPLOYEES'
FILE_ID BLOCK_ID BLOCKS
---------- ---------- ----------
5 81 8

SQL>; alter system dump datafile 5 block 81;

System altered.
另外是做很具体的针对某行所在的BLOCK 并DUMP出来研究，可以用如下方法

1、取BLOCK号
select dbms_rowid.rowid_block_number(rowid) from wdjk1999;

DBMS_ROWID.ROWID_BLOCK_NUMBER(ROWID)
78

2、取文件号
select file_id from dba_data_files where tablespace_name='WDJK1999'

FILE_ID

----------
16

SQL>; alter system dump datafile 16 block 78;

System altered.

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8、DUMP出索引
SQL> select object_id from dba_objects where object_name=upper('index_name');
　　
OBJECT_ID
----------
70591
SQL> ALTER SESSION SET EVENTS 'immediate trace name TREEDUMP level 70591';

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9、DUMP出回滚段信息
select xidusn,xidslot,xidsqn,ubafil,ubablk,ubasqn,ubarec from v$transaction;

XIDUSN XIDSLOT XIDSQN UBAFIL UBABLK UBASQN UBAREC
---------- ---------- ---------- ---------- ---------- ---------- ----------
1 31 442 2 21 242 52
dump对应的undo block
SYS@ning>alter system dump datafile 2 block 21;
System altered.

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10、 DUMP出系统状态分析 (只能是SYSTEM)
alter system set events 'immediate trace name systemdate level 10'

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11、 DUMP出分析进程状态分析
alter session set events 'immediate trace name PROCESSSTATE level 10'

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