Oracle Database 联机日志文件管理
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查询联机日志文件 SQL> col member for a50 SQL> select group#,status,type,member from v$logfile; GROUP# Status TS Type MEMBER ---------- --------- --------------- -------------------------------------------------- 3 ONLINE /u01/app/oracle/oradata/king/redo03.log 2 ONLINE /u01/app/oracle/oradata/king/redo02.log 1 ONLINE /u01/app/oracle/oradata/king/redo01.log
查询联机日志组 SQL> select group#,sequence#,members,bytes,status,archived from v$log; GROUP# SEQUENCE# MEMBERS BYTES Status ARCHIVED ---------- ---------- ---------- ---------- --------- --------- 1 4 1 52428800 INACTIVE YES 2 5 1 52428800 INACTIVE YES 3 6 1 52428800 CURRENT NO
删除联机日志组
SQL> alter database drop logfile group 1;
SQL> host rm -rf /u01/app/oracle/oradata/king/redo01.log
创建联机日志组
SQL> alter database add logfile group 1
('/u01/app/oracle/oradata/king/redo01a.log','/u01/app/oracle/oradata/king/redo01b.log')
size 50M;SQL> alter database drop logfile group 2;
SQL> host rm -rf /u01/app/oracle/oradata/king/redo02.log
SQL> alter database add logfile group 2
('/u01/app/oracle/oradata/king/redo02a.log','/u01/app/oracle/oradata/king/redo02b.log')
size 50M;SQL> alter system switch logfile; SQL> alter system checkpoint;
SQL> alter database drop logfile group 3;
SQL> host rm -rf /u01/app/oracle/oradata/king/redo03.log
SQL> alter database add logfile group 3
('/u01/app/oracle/oradata/king/redo03a.log','/u01/app/oracle/oradata/king/redo03b.log')
size 50M;SQL> select group#,status,type,member from v$logfile; GROUP# Status TS Type MEMBER ---------- --------- --------------- -------------------------------------------------- 3 ONLINE /u01/app/oracle/oradata/king/redo03a.log 2 ONLINE /u01/app/oracle/oradata/king/redo02a.log 1 ONLINE /u01/app/oracle/oradata/king/redo01a.log 1 ONLINE /u01/app/oracle/oradata/king/redo01b.log 2 ONLINE /u01/app/oracle/oradata/king/redo02b.log 3 ONLINE /u01/app/oracle/oradata/king/redo03b.log
SQL> select group#,sequence#,members,bytes,status,archived from v$log; GROUP# SEQUENCE# MEMBERS BYTES Status ARCHIVED ---------- ---------- ---------- ---------- --------- --------- 1 7 2 52428800 CURRENT NO 2 0 2 52428800 UNUSED YES 3 0 2 52428800 UNUSED YES
在日志组中增加联机日志文件 SQL> alter database add logfile member '/u01/app/oracle/oradata/king/redo01c.log' to group 1, '/u01/app/oracle/oradata/king/redo02c.log' to group 2, '/u01/app/oracle/oradata/king/redo03c.log' to group 3;
SQL> select group#,status,type,member from v$logfile; GROUP# Status TS Type MEMBER ---------- --------- --------------- -------------------------------------------------- 3 ONLINE /u01/app/oracle/oradata/king/redo03a.log 2 ONLINE /u01/app/oracle/oradata/king/redo02a.log 1 ONLINE /u01/app/oracle/oradata/king/redo01a.log 1 ONLINE /u01/app/oracle/oradata/king/redo01b.log 2 ONLINE /u01/app/oracle/oradata/king/redo02b.log 3 ONLINE /u01/app/oracle/oradata/king/redo03b.log 1 INVALID ONLINE /u01/app/oracle/oradata/king/redo01c.log 2 INVALID ONLINE /u01/app/oracle/oradata/king/redo02c.log 3 INVALID ONLINE /u01/app/oracle/oradata/king/redo03c.log
SQL> select group#,sequence#,members,bytes,status,archived from v$log; GROUP# SEQUENCE# MEMBERS BYTES Status ARCHIVED ---------- ---------- ---------- ---------- --------- --------- 1 7 3 52428800 CURRENT NO 2 0 3 52428800 UNUSED YES 3 0 3 52428800 UNUSED YES
删除日志组中的联机日志文件 SQL> alter database drop logfile member '/u01/app/oracle/oradata/king/redo02c.log'; SQL> host rm -rf /u01/app/oracle/oradata/king/redo02c.log
SQL> alter database drop logfile member '/u01/app/oracle/oradata/king/redo03c.log'; SQL> host rm -rf /u01/app/oracle/oradata/king/redo03c.log
SQL> alter system switch logfile; SQL> alter system checkpoint;
SQL> alter database drop logfile member '/u01/app/oracle/oradata/king/redo01c.log'; SQL> host rm -rf /u01/app/oracle/oradata/king/redo01c.log
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