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select name,log_mode from v$database;
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archive log list£»(¸Ã·½·¨ÐèÒªas sysdba)
SQL> archive log list
Database log mode ¡¡¡¡¡¡¡¡¡¡¡¡No Archive Mode
Automatic archival¡¡¡¡¡¡¡¡¡¡¡¡Disabled
Archive destination¡¡¡¡¡¡¡¡¡¡ /export/home/oracle/product/8.1.7/dbs/arch
Oldest online log sequence ¡¡ 28613
Current log sequence¡¡¡¡¡¡¡¡¡¡28615
SQL> SELECT NAME,LOG_MODE from V$DATABASE;
NAME¡¡¡¡¡¡¡¡LOG_MODE
--------¡¡¡¡------------
BIGSUN¡¡¡¡¡¡NOARCHIVELOG
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1. SQL> alter system set log_archive_dest_1='location=/oracle/oracle10g/log/archive_log';
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SQL>alter system set log_archive_dest_2='location=/oracle/oracle10g/log2/archive_log';
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SQL> shutdown immediate
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SQL> startup mount;
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SQL> alter database archivelog;
5¡¢´ò¿ªÊý¾Ý¿â£¬²éѯ£º
SQL> alter database open;
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SQL> alter system set log_archive_max_processes = 5;
SQL> alter system set log_archive_format = "archive_%t_%s_%r.log" scope=spfile;
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1£¬sqlplus "/ as sysdba" ÔÚDOSÃüÁîÐÐÏÂÔËÐнøÈëSQL¹ÜÀíÔ±²Ù×÷¿ØÖÆÌ¨¡£
2£¬shutdown immediate;  ¹Ø±ÕORACLEÊý¾Ý¿â¡£
3£¬startup mount;       Æô¶¯Êý¾Ý¿âµ½mount״̬
4£¬alter database archivelog£¨noarchivelog£©; ÆôÓ㨽ûÖ¹£©¹éµµÄ£Ê½¡£
5£¬alter database open;  ´ò¿ªÊý¾Ý¿â¡£
6£¬archive log list; ²é¿´ÊÇ·ñ¿ªÆôÁ˹鵵ģʽ
7£¬archive log start£¨stop£©;   ¿ªÆô£¨Í£Ö¹£©¹éµµÄ£Ê½¡£
8, alter system switch logfile; --Ç¿ÖÆÏµÍ³½øÐÐÈÕÖ¾Çл»£¬¿ÉÂíÉϹ۲쵽¹éµµÈÕÖ¾µ


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Oracle ±í¿Õ¼ä»ù±¾²Ù×÷

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select tablespace_name, file_name, sum(bytes)/1024/1024 table_size from dba_data_files group by tablespace_name,file_name;
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CREATE TABLESPACE data01 DATAFILE '/oracle/oradata/db/DATA01.dbf' SIZE 500M;
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