How to configurate system for two database under one server

Question

Hi Friends,
I installed abd created A database by oracle 10GR4 in window 32 bit 2003.
it works.
Then i created other B database by DBCA under this server.
When I shutdown immediate database.
it works well. But I can not startup mount ot startup A database again,
I got below message as
SQL> startup mount;
ORA-24324: service handle not initialized
ORA-01041: internal error. hostdef extension doesn't exist
SQL> startup;
ORA-24324: service handle not initialized
ORA-01041: internal error. hostdef extension doesn't exist
SQL> startup;
ORA-24324: service handle not initialized
ORA-01041: internal error. hostdef extension doesn't exist
From EM, I saw as
A listen Status Up
LISTENER
Oracle Home          
C:\oracle\product\10.2.0\db_1\BIN
Location          
C:\oracle\product\10.2.0\db_1\BIN\network\admin
BUT agent connect Status          
Failed
Details          ORA-12505: TNS:listener does not currently know of SID given in connect descriptor (DBD ERROR: OCIServerAttach)
A database instance down
Host     salerpt.net
Port 1521
SID SALERPT
Oracle Home C:\oracle\product\10.2.0\db_1\BIN
Also I try to connect as
SQL> connect sys/salel@salerpt as sysdba;
ERROR:
ORA-12514: TNS:listener does not currently know of service requested in connect
descriptor
Form EM, I saw listen start up.
Then I stop it. then restart it
I can saw B db listen and can not see A db listen.
also
I saw that other B database works.
My listen info as***************
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\oracle\product\10.2.0\db_1\BIN)
(PROGRAM = extproc)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(ADDRESS = (PROTOCOL = TCP)(HOST = SALERPT.NET)(PORT = 1521))
I check physical, two database use one common bin directory .
I do not have any experience to handle two database under one oracle server.
How to check and configurate DB server system?
Thanks for help.
Edited by: user589812 on Jan 4, 2009 8:17 AM

Answer 1

Jim,
Before starting the database A, did you set ORACLE_SID=A from command line? You can run as many instances you want from single server provided you enough memory, processing power. Also try starting your instances usign window services and check and post some lines from alert.log for database A.
tnsnames.ora entry
DATABASE_A =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = salesrpt.net)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = DATABASE_A)
DATABASE_B =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = salesrpt.net)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = DATABASE_B)
  )Regards
Edited by: OrionNet on Jan 5, 2009 10:55 AM