alter session set container=PDB$SEED;
select file_name from dba_data_files;

FILE_NAME
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/orcl1/pdbseed/system01.dbf
/u01/app/oracle/oradata/orcl1/pdbseed/sysaux01.dbf
/u01/app/oracle/oradata/orcl1/pdbseed/undotbs01.dbf

conn / as sysdba
create pluggable database pdb2
  admin user pdb_mgr identified by oracle
  file_name_convert=('/u01/app/oracle/oradata/orcl1/pdbseed','/u01/app/oracle/oradata/orcl1/pdb2');

alter pluggable database pdb2 open;
show pdbs

    CON_ID CON_NAME                       OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
         2 PDB$SEED                       READ ONLY  NO
         3 PDB1                           READ WRITE NO
         4 PDB2                           READ WRITE NO

# 创建密码文件
orapwd file=$ORACLE_HOME/dbs/orapworcl1 password=oracle force=y format=12

# 创建参数文件
vi spfileorcl1.ora
#---------------------------------------------------
db_name=orcl1
sga_target=2048M
db_create_file_dest='/u01/app/oracle/oradata/orcl1'
enable_pluggable_database=true
#---------------------------------------------------

# 创建所需目录
mkdir -p /u01/app/oracle/oradata/orcl1

uname –a
cat /etc/redhat-release
grep MemTotal /proc/meminfo
grep SwapTotal /proc/meminfo
df -hT

gdb --args /u01/mysql/bin/mysqld
#--------------------------------------------------------------------------------
GNU gdb (GDB) Red Hat Enterprise Linux (7.2-90.el6)
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /u01/mysql/bin/mysqld...done.
(gdb) b mysqld_main   # 设置断点
Breakpoint 1 at 0x58c0e4: file /u01/mysql-5.6.35/sql/mysqld.cc, line 5245.
(gdb) r   # 运行
Starting program: /u01/mysql/bin/mysqld 
[Thread debugging using libthread_db enabled]

Breakpoint 1, mysqld_main (argc=1, argv=0x7fffffffe668) at /u01/mysql-5.6.35/sql/mysqld.cc:5245
5245    {
Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.192.el6.x86_64 keyutils-libs-1.4-5.0.1.el6.x86_64 
krb5-libs-1.10.3-57.el6.x86_64 libcom_err-1.42.8-1.0.2.el6.x86_64 libgcc-4.4.7-17.el6.x86_64 
libselinux-2.0.94-7.el6.x86_64  libstdc++-4.4.7-17.el6.x86_64 nss-softokn-freebl-3.14.3-23.el6_7.x86_64 
openssl-1.0.1e-48.el6.x86_64 zlib-1.2.3-29.el6.x86_64
(gdb) n   # 向下
5250      my_progname= argv[0];
(gdb) n
5254      if (my_init())                 // init my_sys library & pthreads
(gdb) s   # 看源码位置
my_init () at /u01/mysql-5.6.35/mysys/my_init.c:69
69        if (my_init_done)
(gdb) n
74        my_umask= 0660;                       /* Default umask for new files */
(gdb) n
75        my_umask_dir= 0700;                   /* Default umask for new directories */
#--------------------------------------------------------------------------------