We discovered that our Oracle 12c database was taking up a large amount of disk space with archive logs, so I figured out how to delete the files, but I'm unable to disable archive logging. We don't have an in-house DBA, so I'm trying to figure this out myself. From lots of Googling, it's my understanding that I need to do the following:
sqlplus / as sysdba shutdown immediate startup mount alter database noarchivelog; alter database open;
I've got two problems though. I can't do the "sqlplus / as sysdba", it complains about "ORA-12560: TNS:protocol adapter error" unless I specify the SID, even though it the environment variable is defined. Also, when I do the shutdown, I get "ORA-12514: TNS:listener does not currently know of service requested in connect descriptor" and it disconnects me from Oracle.
C:\Users\administrator.MYDOMAIN>set oracle_sid=orcm C:\Users\administrator.MYDOMAIN>sqlplus /nolog SQL*Plus: Release 126.96.36.199.0 Production on Mon Feb 5 11:11:33 2018 Copyright (c) 1982, 2014, Oracle. All rights reserved. SQL> connect / as sysdba ERROR: ORA-12560: TNS:protocol adapter error SQL> connect sys/password@orcm as sysdba Connected. SQL> SQL> SQL> archive log list; Database log mode Archive Mode Automatic archival Enabled Archive destination E:\app\oracle\product\12.1.0\dbhome_1\RDBMS Oldest online log sequence 6869 Next log sequence to archive 6871 Current log sequence 6871 SQL> shutdown immediate Database closed. Database dismounted. ORACLE instance shut down. ERROR: ORA-12514: TNS:listener does not currently know of service requested in connect descriptor Warning: You are no longer connected to ORACLE. SQL>
Any assistance would be greatly appreciated.