oracle日志管理常用命令

1.forcing log switches

sql> alter system switch logfile;

2.forcing checkpoints

sql> alter system checkpoint;

3.adding online redo log groups

sql> alter database add logfile [group 4] 
sql> ('/disk3/log4a.rdo','/disk4/log4b.rdo') size 1m;

4.adding online redo log members

sql> alter database add logfile member 
sql> '/disk3/log1b.rdo' to group 1, 
sql> '/disk4/log2b.rdo' to group 2;

5.changes the name of the online redo logfile

sql> alter database rename file 'c:/oracle/oradata/oradb/redo01.log' 
sql> to 'c:/oracle/oradata/redo01.log';

6.drop online redo log groups

sql> alter database drop logfile group 3;

7.drop online redo log members

sql> alter database drop logfile member 'c:/oracle/oradata/redo01.log';

8.clearing online redo log files

sql> alter database clear [unarchived] logfile 'c:/oracle/log2a.rdo';

9.using logminer analyzing redo logfiles

in the init.ora specify utl_file_dir = ' ' 
sql> execute dbms_logmnr_d.build('oradb.ora','c:\oracle\oradb\log'); 
sql> execute dbms_logmnr_add_logfile('c:\oracle\oradata\oradb\redo01.log', dbms_logmnr.new); 
sql> execute dbms_logmnr.add_logfile('c:\oracle\oradata\oradb\redo02.log', dbms_logmnr.addfile); 
sql> execute dbms_logmnr.start_logmnr(dictfilename=>'c:\oracle\oradb\log\oradb.ora'); 
sql> select * from v$logmnr_contents(v$logmnr_dictionary,v$logmnr_parameters v$logmnr_logs); 
sql> execute dbms_logmnr.end_logmnr;