标签：follow tle oracl class etl size alter ref members
修改Oracle重做日志文件大小
创建新的日志组1 删除旧的日志组0（旧的日志组状态需要是INACTIVE） 创建新的日志组2，组名为旧的日志组0的组名
删除日志组1
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具体操作步骤：
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1. 创建3个新的日志组
ALTER DATABASE ADD LOGFILE GROUP 4 (‘/u01/app/oracle/oradata/orcl/redo06.log‘) SIZE 500M; ALTER DATABASE ADD LOGFILE GROUP 5 (‘/u01/app/oracle/oradata/orcl/redo05.log‘) SIZE 500M; ALTER DATABASE ADD LOGFILE GROUP 6 (‘/u01/app/oracle/oradata/orcl/redo06.log‘) SIZE 500M;
查看日志组
select * from v$logfile;
2.切换当前日志到新的日志组
alter system switch logfile; alter system switch logfile; alter system switch logfile;
切到要删除为INCACTIVE才行
select group#,sequence#,bytes,members,status from v$log;
GROUP# SEQUENCE# BYTES MEMBERS STATUS
---------- ---------- ---------- ---------- ----------------
1 139 52428800 1 INACTIVE
2 137 52428800 1 INACTIVE
3 138 52428800 1 INACTIVE
4 140 524288000 1 ACTIVE
5 141 524288000 1 CURRENT
6 136 524288000 1 INACTIVE
3. 删除旧的日志组
alter database drop logfile group 1;
Database altered.
4. 查看是否删除了日志组
select group#,sequence#,bytes,members,status from v$log;
GROUP# SEQUENCE# BYTES MEMBERS STATUS
---------- ---------- ---------- ---------- ----------------
4 140 524288000 1 INACTIVE
5 141 524288000 1 CURRENT
6 136 524288000 1 INACTIVE
5. 操作系统删除原日志组1、2、3中的文件
[oracle@oracle122 log]$ cd /u01/app/oracle/oradata/orcl [oracle@oracle122 orcl]$ pwd /u01/app/oracle/oradata/orcl [oracle@oracle122 orcl]$ ls control01.ctl example01.dbf redo01.log redo02.log redo03.log redo04.log redo05.log redo06.log sysaux01.dbf system01.dbf temp01.dbf undotbs01.dbf users01.dbf [oracle@oracle122 orcl]$ rm -rf redo01.log [oracle@oracle122 orcl]$ rm -rf redo02.log [oracle@oracle122 orcl]$ rm -rf redo03.log
6. 重建日志组 1、2、3
ALTER DATABASE ADD LOGFILE GROUP 1 (‘/u01/app/oracle/oradata/orcl/redo01.log‘) SIZE 500M; ALTER DATABASE ADD LOGFILE GROUP 2 (‘/u01/app/oracle/oradata/orcl/redo02.log‘) SIZE 500M; ALTER DATABASE ADD LOGFILE GROUP 3 (‘/u01/app/oracle/oradata/orcl/redo03.log‘) SIZE 500M;
7. 删除中间过渡用的日志组4、5、6 ，在删除时查询select group#,sequence#,bytes,members,status from v$log; 删除组是否为INACTIVE，如果不是INACTIVE 就要执行alter system switch logfile;
查询看一下
select group#,sequence#,bytes,members,status from v$log;
GROUP# SEQUENCE# BYTES MEMBERS STATUS
---------- ---------- ---------- ---------- ----------------
1 148 524288000 1 CURRENT
2 143 524288000 1 INACTIVE
3 144 524288000 1 INACTIVE
4 146 524288000 1 INACTIVE
5 147 524288000 1 INACTIVE
6 145 524288000 1 INACTIVE
SQL> alter database drop logfile group 4; Database altered. SQL> alter database drop logfile group 5; Database altered. SQL> alter database drop logfile group 6; Database altered.
8. 到操作系统删除组4、5、6
[oracle@oracle122 orcl]$ rm -rf redo04.log [oracle@oracle122 orcl]$ rm -rf redo05.log [oracle@oracle122 orcl]$ rm -rf redo06.log
9. 备份当前最新的控制文件
alter database backup controlfile to trace resetlogs ;
标签：follow tle oracl class etl size alter ref members
原文地址：https://www.cnblogs.com/DBA-Ivan/p/9962805.html
