resetlogs报错 ORA-00392
1、报错查看
SQL> alter database open resetlogs upgrade;
alter database open resetlogs upgrade
*
ERROR at line 1:
ORA-00392: log 3 of thread 1 is being cleared, operation not allowed
ORA-00312: online log 3 thread 1: '/u01/oradata/orcl/redo03.log'
2、查看当前日志组状态
SQL> select group#,bytes/1024/1024||'M',status from v$log;
GROUP# BYTES/1024/1024||'M' STATUS
---------- ----------------------------------------- ----------------
1 50M CLEARING
3 50M CLEARING_CURRENT
2 50M CLEARING
3、clear 日志组
SQL> alter database clear logfile group 1;
Database altered.
SQL> alter database clear logfile group 2;
Database altered.
SQL> alter database clear logfile group 3;
Database altered.
SQL> select group#,bytes/1024/1024||'M',status from v$log;
GROUP# BYTES/1024/1024||'M' STATUS
---------- ----------------------------------------- ----------------
1 50M UNUSED
3 50M CURRENT
2 50M UNUSED
4、验证是否报错
alter database open resetlogs upgrade;
注意：
执行这条sql的日志文件的物理变化，那就是执行之前目录中还没有日志文件，执行之后，日志文件自动创建
5、日志组合日志文件之间的关系
SQL> select GROUP#,STATUS,TYPE,MEMBER from v$logfile;
GROUP# STATUS TYPE MEMBER
------ ---------- ---------- ------------------------------
1 ONLINE /u01/oradata/orcl/redo01.log
2 ONLINE /u01/oradata/orcl/redo02.log
3 ONLINE /u01/oradata/orcl/redo03.log
此时每个group组中都有一个member成员
1：每个日志组至少有一个成员，成员之间的关系是镜像关系
2：每个数据库中至少有两个组来回switch切换
6、日志管理（常用）
1：切换日志：alter system switch logfile
2：添加一个日志组
SQL> alter database add logfile group 4 '/u01/oradata/orcl/redo04.log' size 20m;
SQL> select GROUP#,STATUS,TYPE,MEMBER from v$logfile;
GROUP# STATUS TYPE MEMBER
------ ---------- ---------- ------------------------------
1 ONLINE /u01/oradata/orcl/redo01.log
2 ONLINE /u01/oradata/orcl/redo02.log
3 ONLINE /u01/oradata/orcl/redo03.log
4 ONLINE /u01/oradata/orcl/redo04.log
注意：如果没有制定组号，数据库会在创建时自动添加当前最大组号加1
3：添加一个成员
SQL> alter database add logfile member '/u01/oradata/orcl/redo04a.log' to group 4;
SQL> select GROUP#,STATUS,TYPE,MEMBER from v$logfile;
GROUP# STATUS TYPE MEMBER
------ ---------- ---------- ------------------------------
1 ONLINE /u01/oradata/orcl/redo01.log
2 ONLINE /u01/oradata/orcl/redo02.log
3 ONLINE /u01/oradata/orcl/redo03.log
4 ONLINE /u01/oradata/orcl/redo04.log
4 INVALID ONLINE /u01/oradata/orcl/redo04a.log
注意：
1）添加成员不指定大小，镜像关系会自动设置相同大小
2）添加之后处于invalid非正常状态，需要不停的切换日志才能变成正常状态
4：删除一个成员
SQL> alter database drop logfile member '/u01/oradata/orcl/redo04.log';
注意：
1）CURRENT状态不能删除,先切换再删除 alter system switch logfile;
2）ACTIVE有时候能删，有时候不能删，如果删除报错，只能等
5：删除一个日志组
SQL> alter database drop logfile group 3;
注意：
1）CURRENT状态不能删除,先切换再删除 alter system switch logfile;
2）ACTIVE有时候能删，有时候不能删，如果删除报错，只能等
6：清楚报废日志
SQL> alter database clear logfile group 4;
注意：
如果redo04.log文件报废，而且处于非CURRENT状态
