【练习】修改参数

1.用户进程数（修改process=300，重启库后查询）满足300个并发会话

SQL> alter system set processes=300 scope=spfile;

System altered.

SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup
ORACLE instance started.

Total System Global Area  830930944 bytes
Fixed Size                  2257800 bytes
Variable Size             591400056 bytes
Database Buffers          230686720 bytes
Redo Buffers                6586368 bytes
Database mounted.
Database opened.
SQL> show parameter process;

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
aq_tm_processes                      integer     1
cell_offload_processing              boolean     TRUE
db_writer_processes                  integer     1
gcs_server_processes                 integer     0
global_txn_processes                 integer     1
job_queue_processes                  integer     1000
log_archive_max_processes            integer     4
processes                            integer     300
processor_group_name                 string

2.诊断目录位置 (diagnostic_dest)在/u01/app/oracle。

SQL> show parameter diagnostic_dest;

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
diagnostic_dest                      string      /u01/app/oracle

 3.关闭内存自动管理，设置SGA,PGA分别自动管理，SGA=500,PGA=200

SQL> alter system set sga_target=500M scope=spfile;

System altered.
SQL>alter system set pga_aggregate_target=200 scope=spfile;

System altered.

SQL> alter system set memory_target=0 scope=spfile;

System altered.

4.修改参数db_domain为us.oracle.cn

SQL> show parameter domain 

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
db_domain                            string
SQL> alter system set db_domain='us.oracle.cn' scope=spfile;

System altered.

5.90分钟内，避免出现ORA-01555错误

SQL> show parameter undo

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
undo_management                      string      AUTO
undo_retention                       integer     900
undo_tablespace                      string      UNDOTBS1
SQL> alter system set undo_retention = 5400;

System altered.

SQL> show parameter undo;

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
undo_management                      string      AUTO
undo_retention                       integer     5400
undo_tablespace                      string      UNDOTBS1

6.开启审计，OS

SQL> show parameter audit_trail

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
audit_trail                          string      DB
SQL> alter system set audit_trail = os scope=spfile;

System altered.