-SERVICE_NAMES = INSTANCE_NAME + DB_DOMAIN
-GLOBAL DATABASE NAME should be same as SERVICE_NAMES
-If system ts is LMT then temporary tablespace is required.
-if system ts is lmt then no dmt can be created in db.
-When system ts is LMT then undo tbs is also must.
-1 tbs can have max 1022 dbfs.
-1 database can have max 65533 dbfs.
-1 db can have unlimited tbs. but max dbf per db is 65533 so max 65533 tbs allowed.
-autoextend on is not good for UNDO and TEMP files.
-extent mgmt local will replace all manual extent parameters.
-segment space mgmt auto will ignore pctfree, pctused, freelists, freelist groups.
-the min extent size for LMT with autoallocate is 64K
-bigfile tbs are always LMT.
-temp tbs are by default LMT with uniform size 1M
-lsnrctl services listener_testdb will give all db service listing and cumulative information for how many connections are made, rejected for that dbservice from that listener.
– dynamic service registration of database services to listener is there since oracle 8i.