处理Oracle 监听文件listener.log

   如果连接时候变得较慢 查看oracle日志记录，可能是因为此文件太大，超过2g，
需要定期清理，（如果多用户，记得用root，可能没权限）

查看listener.log？

find / -name listener.log

经查看，竟然高达2g得日志数据，由于一些老旧的os不支持2gb以上的文件，故当listener.log文件
超过2gb时，会出现无法处理新的连接，新的操作系统虽然不会出现这个问题，但我们依然需要对其
进行定期处理清理。

listener log日志文件处理

[oracle@localhost home]$ lsnrctl
lsnrctl> set log_status off
connecting to (description=(address=(protocol=ipc)(key=extproc1521)))
listener parameter "log_status" set to off
the command completed successfully
lsnrctl> show log_status
connecting to (description=(address=(protocol=ipc)(key=extproc1521)))
listener parameter "log_status" set to off
the command completed successfully
lsnrctl> exit
[oracle@localhost home]$ find -name listener.log
home/oracle/app/oracle/diag/tnslsnr/localhost/listener/trace/listener.log
[oracle@localhost ~]$ cd /home/oracle/app/oracle/diag/tnslsnr/localhost/listener/trace/
[oracle@localhost trace]$ mv listener.log listener.log.20191127
[oracle@localhost trace]$ ls
listener.log.20191127  ora_2617_140154513196800.trc
[oracle@localhost trace]$ lsnrctl
lsnrctl> set log_status on
connecting to (description=(address=(protocol=ipc)(key=extproc1521)))
listener parameter "log_status" set to on
the command completed successfully
lsnrctl> show log_status 
connecting to (description=(address=(protocol=ipc)(key=extproc1521)))
listener parameter "log_status" set to on
the command completed successfully
lsnrctl> reload
connecting to (description=(address=(protocol=ipc)(key=extproc1521)))
the command completed successfully
lsnrctl> exit
[oracle@localhost trace]$

[oracle@localhost home]$ lsnrctl
lsnrctl> set log_status off
lsnrctl> show log_status
lsnrctl> exit
[oracle@localhost home]$ find -name listener.log
[oracle@localhost trace]$ mv listener.log listener.log.20191127
lsnrctl> set log_status on
lsnrctl> reload

我们通过重命名日志文件之后，会自动生成一个新的listener.log文件。当然也可以进行清空处理，可以先
copy一下备份，然后进行清空处理。