OS환경 : Oracle Linux 7.6 (64bit)
DB 환경 : Oracle Database 19.10.0.0
방법 : 오라클 19c XDB service dispatcher 포트 변경 및 비활성화
dedicate mode 로 설치된 db에서
lsnrctl service 로 확인 시 나오는 xdb를 포트를 변경하거나 비활성화 하는 방법에 대해 설명함
리스너 상태 확인
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$ lsnrctl status
LSNRCTL for Linux: Version 19.0.0.0.0 - Production on 22-APR-2021 15:55:42
Copyright (c) 1991, 2020, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=ORACLE19)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 19.0.0.0.0 - Production
Start Date 09-MAR-2021 09:17:36
Uptime 44 days 6 hr. 38 min. 5 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /app/oracle/product/19.0.0/network/admin/listener.ora
Listener Log File /app/oracle/product/19.0.0/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ORACLE19)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
Services Summary...
Service "ORCL19" has 1 instance(s).
Instance "ORCL19", status READY, has 1 handler(s) for this service...
Service "ORCL19XDB" has 1 instance(s).
Instance "ORCL19", status READY, has 1 handler(s) for this service...
The command completed successfully
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리스너는 1521 포트를 사용중임
리스너 서비스 확인
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$ lsnrctl service
LSNRCTL for Linux: Version 19.0.0.0.0 - Production on 22-APR-2021 15:56:10
Copyright (c) 1991, 2020, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=ORACLE19)(PORT=1521)))
Services Summary...
Service "ORCL19" has 1 instance(s).
Instance "ORCL19", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Service "ORCL19XDB" has 1 instance(s).
Instance "ORCL19", status READY, has 1 handler(s) for this service...
Handler(s):
"D000" established:0 refused:0 current:0 max:1022 state:ready
DISPATCHER <machine: ORACLE19, pid: 3250>
(ADDRESS=(PROTOCOL=tcp)(HOST=ORACLE19)(PORT=16171))
The command completed successfully
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현재 XDB의 dispatcher가 16171 포트를 사용하고 있음
OS에서 사용포트 확인
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$ netstat -ntlp
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN -
tcp 0 0 192.168.122.1:53 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN -
tcp6 0 0 :::16171 :::* LISTEN 3250/ora_d000_ORCL1
tcp6 0 0 :::111 :::* LISTEN -
tcp6 0 0 :::1521 :::* LISTEN 8099/tnslsnr
tcp6 0 0 :::22 :::* LISTEN -
tcp6 0 0 ::1:631 :::* LISTEN -
tcp6 0 0 ::1:25 :::* LISTEN -
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dispatcher 파라미터 확인
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SQL> show parameter dispatchers
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
dispatchers string (PROTOCOL=TCP) (SERVICE=ORCL19
XDB)
max_dispatchers integer
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db 재기동 시 dispatcher 포트는 변경됨
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SQL> shutdown immediate
SQL> startup
SQL> alter system register;
$ lsnrctl service
LSNRCTL for Linux: Version 19.0.0.0.0 - Production on 22-APR-2021 16:10:09
Copyright (c) 1991, 2020, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=ORACLE19)(PORT=1521)))
Services Summary...
Service "ORCL19" has 1 instance(s).
Instance "ORCL19", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Service "ORCL19XDB" has 1 instance(s).
Instance "ORCL19", status READY, has 1 handler(s) for this service...
Handler(s):
"D000" established:0 refused:0 current:0 max:1022 state:ready
DISPATCHER <machine: ORACLE19, pid: 4669>
(ADDRESS=(PROTOCOL=tcp)(HOST=ORACLE19)(PORT=25523))
The command completed successfully
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dispatcher 파라미터 변경은 시도(포트 20000으로 고정)
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SQL> alter system set dispatchers="(address=(PROTOCOL=TCP) (SERVICE=ORCL19XDB) (PORT=20000))" scope=both;
System altered.
SQL> show parameter dispatchers
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
dispatchers string (PROTOCOL=TCP)(SERVICE=ORCL19X
DB), (address=(PROTOCOL=TCP) (
SERVICE=ORCL19XDB) (PORT=20000
))
max_dispatchers integer
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기존에 있던 (PROTOCOL=TCP)(SERVICE=ORCL19XDB) 가 변경되는게 아니라
신규로 (address=(PROTOCOL=TCP) (SERVICE=ORCL19XDB) (PORT=20000)) 이 추가됨
리스너 서비스 확인
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$ lsnrctl service
LSNRCTL for Linux: Version 19.0.0.0.0 - Production on 22-APR-2021 16:51:00
Copyright (c) 1991, 2020, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=ORACLE19)(PORT=1521)))
Services Summary...
Service "ORCL19" has 1 instance(s).
Instance "ORCL19", status READY, has 2 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
"D001" established:0 refused:0 current:0 max:1022 state:ready
DISPATCHER <machine: ORACLE19, pid: 7556>
(ADDRESS=(PROTOCOL=tcp)(HOST=ORACLE19)(PORT=20000))
Service "ORCL19XDB" has 1 instance(s).
Instance "ORCL19", status READY, has 1 handler(s) for this service...
Handler(s):
"D000" established:0 refused:0 current:0 max:1022 state:ready
DISPATCHER <machine: ORACLE19, pid: 7307>
(ADDRESS=(PROTOCOL=tcp)(HOST=ORACLE19)(PORT=25951))
The command completed successfully
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예상과는 다르게 ORCL19XDB의 PORT가 변경되는것이 아닌
ORCL19에 D001이 생기면서 포트가 20000으로 할당됨
XDB의 포트는 변경을 하지 못하는듯함
dispatcher 파라미터 변경 비활성화
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SQL> alter system set dispatchers='' scope=both;
System altered.
SQL>
SQL> show parameter dispatchers
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
dispatchers string
max_dispatchers integer
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리스너 서비스 확인
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$ lsnrctl service
LSNRCTL for Linux: Version 19.0.0.0.0 - Production on 22-APR-2021 16:52:29
Copyright (c) 1991, 2020, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=ORACLE19)(PORT=1521)))
Services Summary...
Service "ORCL19" has 1 instance(s).
Instance "ORCL19", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Service "ORCL19XDB" has 1 instance(s).
Instance "ORCL19", status READY, has 0 handler(s) for this service...
The command completed successfully
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ORCL19XDB 서비스가 사용하던 PORT가 없어짐
OS에서 사용포트 확인
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$ netstat -ntlp
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN -
tcp 0 0 192.168.122.1:53 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN -
tcp6 0 0 :::111 :::* LISTEN -
tcp6 0 0 :::8080 :::* LISTEN 4568/tnslsnr
tcp6 0 0 :::1521 :::* LISTEN 4568/tnslsnr
tcp6 0 0 :::22 :::* LISTEN -
tcp6 0 0 ::1:631 :::* LISTEN -
tcp6 0 0 ::1:25 :::* LISTEN -
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정상적으로 D000이 사용하던 포트가 제거됨
참조 : 2673196.1, 1552327.1
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