[20200115]监听中没有xdb服务.txt

--//链接http://www.itpub.net/thread-2123866-1-1.html的问题，查看监听状态发现没有XDB的服务。

--//问题的原因是对方没有配置shared_servers＝0.通过测试说明：

1.环境：

SYS@book> @ ver1

PORT_STRING                    VERSION        BANNER

------------------------------ -------------- --------------------------------------------------------------------------------

x86_64/Linux 2.4.xx            11.2.0.4.0     Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

SYS@book> show parameter dispatchers

NAME            TYPE    VALUE

--------------- ------- -------------------------------------

dispatchers     string  (PROTOCOL=TCP) (SERVICE=book,bookXDB)

max_dispatchers integer

--//执行lsnrctl status，可以发现bookXDB存在。这步略。

...

Service "bookXDB" has 1 instance(s).

Instance "book", status READY, has 1 handler(s) for this service...

The command completed successfully

2.测试：

SYS@book> alter system set shared_servers=0;

System altered.

SYS@book> shutdown immediate ;

Database closed.

Database dismounted.

ORACLE instance shut down.

SYS@book> startup

ORACLE instance started.

Total System Global Area  643084288 bytes

Fixed Size                  2255872 bytes

Variable Size             205521920 bytes

Database Buffers          427819008 bytes

Redo Buffers                7487488 bytes

Database mounted.

Database opened.

SYS@book> alter system register ;

System altered.

$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 15-JAN-2020 11:14:20

Copyright (c) 1991, 2013, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(ARGV0=LLLLLL)(HOST=0.0.0.0)(PORT=1521)(ARGV0=KKKKK)))

STATUS of the LISTENER

------------------------

Alias                     LISTENER

Version                   TNSLSNR for Linux: Version 11.2.0.4.0 - Production

Start Date                23-DEC-2019 15:52:01

Uptime                    22 days 19 hr. 22 min. 19 sec

Trace Level               off

Security                  ON: Local OS Authentication

SNMP                      OFF

Listener Parameter File   /u01/app/oracle/product/11.2.0.4/dbhome_1/network/admin/listener.ora

Listener Log File         /u01/app/oracle/product/11.2.0.4/dbhome_1/network/log/listener.log

Listening Endpoints Summary...

(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=1521)))

(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))

Services Summary...

Service "BOOKSHARE" has 1 instance(s).

Instance "book", status READY, has 1 handler(s) for this service...

Service "booK" has 2 instance(s).

Instance "book", status UNKNOWN, has 1 handler(s) for this service...

Instance "book", status READY, has 1 handler(s) for this service...

The command completed successfully

--//可以发现bookXDB服务名不存在。