Oracle常用命令_日志管理

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