Oracle 监听器日志配置与管理

Oracle 监听器日志配置与管理

　 Oracle 监听器是一个服务器端程序，用于监听所有来自客户端的请求，并为其提供 数据库服务。因此对监听器的管理与维护相当重要。

　　本文主要描述对Oracle监听器日志文件的配置与管理。

　　一、监听器日志特性

　　1、监听器日志是一个纯文本文件，通常位于$ORACLE_HOME/network/log目录下，与sqlnet.log日志文件处于同一路径

　　2、其缺省的文件名为listener.log。对于非缺省的监听器，则产生的日志文件通常为listenername.log

　　3、该文件缺省由监听器自动创建，当日志文件丢失时或不存在时，会自动重新创建一个同名的文件，与alert_<SID>.log文件类似

　　4、该文件的尺寸会不断自动增长，当尺寸过大时或不便于阅读时，考虑将其备份

　　5、Oracle监听器在运行时不允许对日志文件做删除，重命名操作

　　6、可以设置日志状态为ON或OFF来实现启用或关闭日志

　　二、设置日志文件目录及路径

　　1、设置日志文件目录的两种方法

lsnrctl SET LOG_DIRECTORY directory         LSNRCTL> SET LOG_DIRECTORY /usr/oracle/admin/log

　　2、设置日志文件的两种方法

lsnrctl SET LOG_FILE file_name          LSNRCTL> SET LOG_FILE file_name

　　3、设置日志的状态

lsnrctl SET LOG_STATUS {on | off}  LSNRCTL> SET LOG_STATUS {on | off}

　　4、演示设置

　　a）切换到日志目录查看日志文件

[oracle@test ~]$ cd $ORACLE_HOME/network/log     [oracle@test log]$ ls -hltr  total 348K  -rw-r--r--  1 oracle oinstall 305K Apr  6 05:30 listener.log  -rw-r--r--  1 oracle oinstall  26K Jun 27 01:52 listener_demo92.log

　　b）查看当前监听器的状态

 [oracle@test log]$ lsnrctl status listener_demo92
           
 LSNRCTL for Linux: Version 9.2.0.8.0 - Production on 27-JUN-2011 01:54:31
           
 Copyright (c) 1991, 2006, Oracle Corporation.  All rights reserved.
           
 Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=test)(PORT=1521)))
 STATUS of the LISTENER
 ------------------------
 Alias                     listener_demo92
 Version                   TNSLSNR for Linux: Version 9.2.0.8.0 - Production
 Start Date                27-JUN-2011 01:52:18
 Uptime                    0 days 0 hr. 2 min. 13 sec
 Trace Level               off
 Security                  ON
 SNMP                      OFF
 Listener Parameter File   /oracle/92/network/admin/listener.ora
 Listener Log File         /oracle/92/network/log/listener_demo92.log
 Listening Endpoints Summary...
 (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=test)(PORT=1521)))
 (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC)))
 Services Summary...
 Service "demo92" has 1 instance(s).
              Instance "demo92", status READY, has 1 handler(s) for this service...
            The command completed successfully       
      

　c）设置监听器目录及日志文件

LSNRCTL> set current_listener listener_demo92                                  Current Listener is listener_demo92                                            LSNRCTL> set password                                                          Password:                                                                      The command completed successfully                                             LSNRCTL> set log_directory /home/oracle/log                                    Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=test)(PORT=1521)))     listener_demo92 parameter "log_directory" set to /home/oracle/log              The command completed successfully                                             LSNRCTL> set log_file listener_test.log                                        Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=test)(PORT=1521)))     listener_demo92 parameter "log_file" set to listener_test.log                  The command completed successfully                                             LSNRCTL> set log_status on                                                     Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=test)(PORT=1521)))     listener_demo92 parameter "log_status" set to ON                               The command completed successfully                                             LSNRCTL> save_config                                                           Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=test)(PORT=1521)))     Saved listener_demo92 configuration parameters.                                Listener Parameter File   /oracle/92/network/admin/listener.ora                Old Parameter File   /oracle/92/network/admin/listener.bak                     The command completed successfully                                             LSNRCTL> exit

　　d）查看新路径下产生的日志文件

[oracle@test admin]$ cd /home/oracle/log                                                              [oracle@test log]$ ls -hltr                                                                           total 16K                                                                                             -rw-r--r--  1 oracle oinstall  41 Jun 27 02:11 listener_demo92.log  -->设置目录之后生成的             -rw-r--r--  1 oracle oinstall 113 Jun 27 02:12 listener_test.log    -->设置日志文件名之后的新日志文件                                                                                                       [oracle@test log]$ ls -hltr    -->隔段时间查看，原来的日志文件不再增长，使用设定的日志文件名记录日志  total 16K                                                                                             -rw-r--r--  1 oracle oinstall   41 Jun 27 02:11 listener_demo92.log                                   -rw-r--r--  1 oracle oinstall 1.3K Jun 27 02:17 listener_test.log

　　e）查看listener.ora配置文件的变化

[oracle@test admin]$ more listener.ora            
#----ADDED BY TNSLSNR 27-JUN-2011 02:12:37---     
LOG_DIRECTORY_listener_demo92 = /home/oracle/log  
LOG_FILE_listener_demo92 = listener_test.log      
LOGGING_listener_demo92 = ON                      
#--------------------------------------------     

三、日志文件的备份与重命名

　　通常情况下，需要停止监听器来对日志文件进行备份，下面使用不停止监听的情况下对日志文件重命名以实现备份

　　1、Windows平台的处理

C:\>cd \oracle\ora92\network\log     -->切换到监听器日志文件所在目录                                         C:\oracle\ora92\network\log> lsnrctl set log_status off -->暂停或脱机记录日志文件                            C:\oracle\ora92\network\log> rename listener.log listener.old -->重命名日志文件，一般加上日期                C:\oracle\ora92\network\log> lsnrctl set log_status on -->联机监听器日志文件，会自动重新创建一个新的日志文件

　　2、Unix/Linux平台的处理

$ lsnrctl set log_status off                                                                             $ mv listener.log listener.old -->另一种方法，cp listener.log /log/bak/. 然后 cp /dev/null >listener.log $ lsnrctl set log_status on

　　3、演示Linux平台下重命名日志文件

[oracle@test ~]$ cd /home/oracle/log                                                    [oracle@test log]$ lsnrctl set log_status off  -->如果存在密码，应使用LSNRCTL界面来完成                                                                                         LSNRCTL for Linux: Version 9.2.0.8.0 - Production on 27-JUN-2011 02:41:09                                                                                                       Copyright (c) 1991, 2006, Oracle Corporation.  All rights reserved.                                                                                                             Connecting to (ADDRESS=(PROTOCOL=tcp)(PORT=1521))                                       LISTENER parameter "log_status" set to OFF                                              The command completed successfully                                                      [oracle@test log]$ mv listener_test.log listener_test.old                               [oracle@test log]$ lsnrctl set log_status on                                                                                                                                    LSNRCTL for Linux: Version 9.2.0.8.0 - Production on 27-JUN-2011 02:41:31                                                                                                       Copyright (c) 1991, 2006, Oracle Corporation.  All rights reserved.                                                                                                             Connecting to (ADDRESS=(PROTOCOL=tcp)(PORT=1521))                                       LISTENER parameter "log_status" set to ON                                               The command completed successfully