linux下oracle lsnrctl启动慢的解决方式
今天启动很久没动的oracle时发现启动监听的速度超级慢，以下为启动信息。
oracle@tomato:~$ lsnrctl start
LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 14-FEB-2011 16:15:04
Copyright (c) 1991, 2005, Oracle. All rights reserved.
Starting /opt/oracle/product/db/bin/tnslsnr: please wait...
TNSLSNR for Linux: Version 10.2.0.1.0 - Production
System parameter file is /opt/oracle/product/db/network/admin/listener.ora
Log messages written to /opt/oracle/product/db/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1521)))
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=127.0.0.1)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date 14-FEB-2011 16:15:04
Uptime 0 days 0 hr. 3 min. 55 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /opt/oracle/product/db/network/admin/listener.ora
Listener Log File /opt/oracle/product/db/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
从上面的启动信息可以看出，启动监听消耗了3分55秒，天阿，这么久。。。
如果你也遇到了和我一样的问题，那么你不妨试试以下的解决方法：
1.首先查看oracle的listener.ora和tnsnames.ora文件。
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /opt/oracle/product/db)
(PROGRAM = extproc)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
)
)
上面红色的标记代表oracle解析时的HOST（oracle监听启动慢，是因为需要逐个匹配/etc/hosts中的配置）
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