Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production. ---->数据库版本信息
ORACLE_HOME:    /u01/app/oracle/product/12.2.0/dbhome_1 ---->数据库HOME
System name:    Linux   ------------------------------------>操作系统平台
Node name:      db12cr2 ------------------------------------>主机名
Release:        2.6.32-573.el6.x86_64 ---------------------->内核版本号
Version:        #1 SMP Wed Jul 1 18:23:37 EDT 2015 
Machine:        x86_64  ------------------------------------>64bit还是32bit.
Using parameter settings in server-side spfile /u01/app/oracle/product/12.2.0/dbhome_1/dbs/spfileorcl.ora
System parameters with non-default values:
  processes                = 320
  nls_language             = "AMERICAN"
  nls_territory            = "AMERICA"
  sga_target               = 560M
  control_files            = "/u01/app/oracle/oradata/orcl/control01.ctl"
  control_files            = "/u01/app/oracle/oradata/orcl/control02.ctl"
  db_block_size            = 8192
  compatible               = "12.2.0"
  db_files                 = 20
  undo_tablespace          = "UNDOTBS1"
  sec_case_sensitive_logon = TRUE