1.专有模式
dedicated server: shared_servers=0
新建一个连接，产生一个新的server prrocess,oracle<sid>
使用dbca创建数据库，选择专有模式，shred_servers=1,有s000,d000进程
SQL> show parameter shared_servers
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
max_shared_servers integer
shared_servers integer 1
SQL> show parameter dispatcher
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
dispatchers string (PROTOCOL=TCP) (SERVICE=ORCLXDB)
max_dispatchers integer
[[email protected] ~]$ ps -ef | grep s00
oracle 4888 1 0 16:25 ? 00:00:00 ora_s000_ORCL
[[email protected] ~]$ ps -ef | grep d00
oracle 4886 1 0 16:25 ? 00:00:00 ora_d000_ORCL
2.共享模式
shared server: shared_servers>0
新建一个连接，不产生新的server process,使用已有的s00n,d00n
连接多，时间短
即使数据库工作在共享模式,其本地连接也是专有的.
SQL> alter system set shared_servers=5 scope=both;
System altered.
SQL> alter system set dispatchers = "(protocol=tcp)(dispatchers=5)(protocol=ipc)(dispatchers=1)" scope=both;
System altered.
SQL> alter system set max_dispatchers=10 scope=both;
System altered.
SQL> show parameter shared_servers
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
max_shared_servers integer
shared_servers integer 5
SQL> show parameter dispatcher
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
dispatchers string (PROTOCOL=TCP) (SERVICE=ORCLXDB), (protocol=tcp)(dispatchers=5)(protocol=ipc)(dispatchers=1)
max_dispatchers integer 10
[[email protected] ~]$ ps -ef | grep s00
oracle 4183 1 0 20:31 ? 00:00:00 ora_s000_ORCL
oracle 4741 1 0 20:50 ? 00:00:00 ora_s001_ORCL
oracle 4743 1 0 20:50 ? 00:00:00 ora_s002_ORCL
oracle 4745 1 0 20:50 ? 00:00:00 ora_s003_ORCL
oracle 4747 1 0 20:50 ? 00:00:00 ora_s004_ORCL
[[email protected] ~]$ ps -ef | grep d00
oracle 4181 1 0 20:31 ? 00:00:00 ora_d000_ORCL
oracle 4764 1 0 20:50 ? 00:00:00 ora_d001_ORCL
客户端
$ORACLE_HOME/network/admin/tnsnames.ora
－－－－－－－－－－－－－－－－－－－－－－－－－
ORCL =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.88)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = SHARED)
(SERVICE_NAME = orcl)
)
)
--将Server改为共享模式，此时缺省为共享，新建连接，不产生oracle<sid>进程
--当Server为共享模式，客户端设为专有，仍为专有连接
转载于:https://blog.51cto.com/lbxwang/847332