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'''';
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;
4.change the storage setting sql> alter tablespace app_data minimum extent 2m; sql> alter tablespace app_data default storage(initial 2m next 2m maxextents 999);
5.taking tablespace offline or online sql> alter tablespace app_data offline; sql> alter tablespace app_data online;
6.read_only tablespace sql> alter tablespace app_data read only|write;
7.droping tablespace sql> drop tablespace app_data including contents;
8.enableing automatic extension of data files sql> alter tablespace app_data add datafile ''''c:\oracle\oradata\app_data01.dbf'''' size 200m sql> autoextend on next 10m maxsize 500m;
9.change the size fo data files manually sql> alter database datafile ''''c:\oracle\oradata\app_data.dbf'''' resize 200m;
10.Moving data files: alter tablespace sql> alter tablespace app_data rename datafile ''''c:\oracle\oradata\app_data.dbf'''' sql> to ''''c:\oracle\app_data.dbf'''';
11.moving data files:alter database sql> alter database rename file ''''c:\oracle\oradata\app_data.dbf'''' sql> to ''''c:\oracle\app_data.dbf'''';