Enabling Database 12c in write mode

SQL> select name, open_mode from v$pdbs;

NAME OPEN_MODE
—————————— ———-
PDB$SEED READ ONLY
PDBORCL MOUNTED

SQL> alter pluggable database PDBORCL open;

Pluggable database altered.

SQL> select name, open_mode from v$pdbs;

NAME OPEN_MODE
—————————— ———-
PDB$SEED READ ONLY
PDBORCL READ WRITE

#.

> alter system set session_cached_cursors=100 scope=spfile;
> alter system set processes=500 scope=spfile;
> shutdown immediate;
> startup;
> alter system set aq_tm_processes=1 scope=both;
> alter system set open_cursors=800 scope=both;