oracle 中 alert 报警日志过大的处理方法
数据库中的报警日志过大，导致无法打开阅读
[oracle@tran110 trace]$ du -sh alert_orcl.log
38M alert_orcl.log
对原来的报警日志改名进行备份
[oracle@tran110 trace]$ mv alert_orcl.log alert_orcl.log_bk_20151113
创建新的 alert 日志
[oracle@tran110 trace]$ touch alert_orcl.log alert_orcl.log
切换日志，查看新的日志文件能否正常写入信息
[oracle@tran110 ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.3.0 Production on Fri Nov 13 16:53:56 2015
Copyright (c) 1982, 2011, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> alter system switch logfile;
System altered.
查看日志的内容
[oracle@tran110 trace]$ tail -20 alert_orcl.log
Fri Nov 13 16:54:03 2015
Thread 1 advanced to log sequence 2912 (LGWR switch)
Current log# 2 seq# 2912 mem# 0: /u01/app/oracle/oradata/orcl/redo02.log
[oracle@tran110 trace]$ du -sh alert_orcl.log
38M alert_orcl.log
对原来的报警日志改名进行备份
[oracle@tran110 trace]$ mv alert_orcl.log alert_orcl.log_bk_20151113
创建新的 alert 日志
[oracle@tran110 trace]$ touch alert_orcl.log alert_orcl.log
切换日志，查看新的日志文件能否正常写入信息
[oracle@tran110 ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.3.0 Production on Fri Nov 13 16:53:56 2015
Copyright (c) 1982, 2011, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> alter system switch logfile;
System altered.
查看日志的内容
[oracle@tran110 trace]$ tail -20 alert_orcl.log
Fri Nov 13 16:54:03 2015
Thread 1 advanced to log sequence 2912 (LGWR switch)
Current log# 2 seq# 2912 mem# 0: /u01/app/oracle/oradata/orcl/redo02.log
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