Listener ( lsnrctl ) - stop and start just one instance

Question

Hey all. I hava a Oracle 9.2 installed over a Linux Red Hat 4.0 64 bits server.
Some Virtual Machines will connect in some databases installed in my Oracle server. My listener has one instance for each database like this:
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = VM01)
(ORACLE_HOME = /opt/oracle/product/9.2.0)
(SID_NAME = VM01)
(SID_DESC =
(GLOBAL_DBNAME = VM02)
(ORACLE_HOME = /opt/oracle/product/9.2.0)
(SID_NAME = VM02)
(SID_DESC =
(GLOBAL_DBNAME = VM03)
(ORACLE_HOME = /opt/oracle/product/9.2.0)
(SID_NAME = VM03)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = VM01))
(ADDRESS = (PROTOCOL = IPC)(KEY = VM02))
(ADDRESS = (PROTOCOL = IPC)(KEY = VM03))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = lab2)(PORT = 1521))
And my tnsnames:
VM03 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = lab2)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = VM03)
VM02 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = lab2)(PORT = 1521))
(CONNECT_DATA =
(SID = VM02)
VM01 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = lab2)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = VM01)
I need to start and stop just one instance (VM01 or VM02 or VM03). I really can't stop all instances when I need to stop just one. And more if i have to create another instance i will have to stop the listener... and i can't because other people are using your instance...
Do you know how to help me?
Thanksssssss

Answer 1

You still use listener.ora, just create 3 listeners, one for each instance:
listener.ora:
LISTENER_VM01 =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(HOST = lab2)(KEY = VM01))
(ADDRESS = (PROTOCOL = TCP)(HOST = lab2)(PORT = 1521))
SID_LIST_LISTENER_VM01 =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = VM01)
(ORACLE_HOME = /opt/oracle/product/9.2.0)
(SID_NAME = VM01)
LISTENER_VM02 =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(HOST = lab2)(KEY = VM02))
(ADDRESS = (PROTOCOL = TCP)(HOST = lab2)(PORT = 1522))
SID_LIST_LISTENER_VM02 =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = VM02)
(ORACLE_HOME = /opt/oracle/product/9.2.0)
(SID_NAME = VM02)
LISTENER_VM03 =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(HOST = lab2)(KEY = VM03))
(ADDRESS = (PROTOCOL = TCP)(HOST = lab2)(PORT = 1523))
SID_LIST_LISTENER_VM03 =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = VM03)
(ORACLE_HOME = /opt/oracle/product/9.2.0)
(SID_NAME = VM03)
Then, when you need to stop the connections to only one instance, you stop the corresponding listener:
lsnrctl stop listener_vm02
lsnrctl start listener_vm02
For each instance you need to configure the parameter local_listener:
sys@VM01> alter system set local_listener=listener_vm01;
sys@VM02> alter system set local_listener=listener_vm02;
sys@VM03> alter system set local_listener=listener_vm03;
And register in tnsnames.ora:
listener_vm01=
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=lab2)(PORT=1521)))
listener_vm02=
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=lab2)(PORT=1522)))
listener_vm03=
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=lab2)(PORT=1523)))
It's a recommended configuration for the flexibility it provides,it requires a different port for each listener, but you don't need to edit the listener.ora file each time you need to stop the connectivity to only one instance.