oracle数据库修改连接数

最近在用weblogic部署项目，同时用的是oracle数据库，然后今天遇到一个问题：多个用户连接数据库连接不成功，有时提示被锁住，经检查发现一方面weblogic控制台中数据源的连接池配置没有配置足够的容量，另一方面是oracle数据库没有配足够的连接数

1.weblogic控制台修改如下

2.通过cmd命令修改数据库连接数并重启数据库

C:\Users\Administrator>sqlplus sys/sys@192.168.13.211/oanet as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on 星期四 2月 9 11:57:01 2017

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

ERROR:
ORA-12560: TNS: 协议适配器错误

请输入用户名:
ERROR:
ORA-12560: TNS: 协议适配器错误

请输入用户名:
ERROR:
ORA-12560: TNS: 协议适配器错误

SP2-0157: 在 3 次尝试之后无法连接到 ORACLE, 退出 SQL*Plus

C:\Users\Administrator>d:

D:\>cd app

D:\app>cd Administrator

D:\app\Administrator>cd product

D:\app\Administrator\product>cd 11.2.0

D:\app\Administrator\product\11.2.0>cd dbhome_1

D:\app\Administrator\product\11.2.0\dbhome_1>cd BIN

D:\app\Administrator\product\11.2.0\dbhome_1\BIN>sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on 星期四 2月 9 11:57:25 2017

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

连接到:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> show parameter processes

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
aq_tm_processes                      integer     1
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     150
SQL> select count(*) from v$process;

  COUNT(*)
----------
        85

SQL> show parameter session

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
java_max_sessionspace_size           integer     0
java_soft_sessionspace_limit         integer     0
license_max_sessions                 integer     0
license_sessions_warning             integer     0
session_cached_cursors               integer     50
session_max_open_files               integer     10
sessions                             integer     248
shared_server_sessions               integer

SQL> select count(*) from v$session;

  COUNT(*)
----------
        82

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

系统已更改。

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

系统已更改。

SQL> shutdown immediate
数据库已经关闭。
已经卸载数据库。
ORACLE 例程已经关闭。
SQL> startup
ORACLE 例程已经启动。

Total System Global Area 1352876032 bytes
Fixed Size                  2281056 bytes
Variable Size             922747296 bytes
Database Buffers          419430400 bytes
Redo Buffers                8417280 bytes
数据库装载完毕。
数据库已经打开。
SQL>

修改linux系统下的oracle数据库连接数：
[oracle@localhost ~]$ sqlplus /nolog

SQL*Plus: Release 11.2.0.4.0 Production on Fri May 5 10:26:24 2017

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

SQL> conn /as sysdba
????
SQL> show parameter session

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
java_max_sessionspace_size           integer     0
java_soft_sessionspace_limit         integer     0
license_max_sessions                 integer     0
license_sessions_warning             integer     0
session_cached_cursors               integer     50
session_max_open_files               integer     10
sessions                             integer     248
shared_server_sessions               integer
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     150
processor_group_name                 string
SQL> alter system set processes=400 scope=spfile;                                                                    

??????

SQL> alter system set sessions=450 scope=spfile;

??????

SQL> show parametersession
SP2-0735: ??? SHOW ???? "parameters..."
SQL> shutdown immediate;
????????
????????
ORACLE ???????
SQL> startup
ORACLE ???????

Total System Global Area  784998400 bytes
Fixed Size                  2257352 bytes
Variable Size             599789112 bytes
Database Buffers          176160768 bytes
Redo Buffers                6791168 bytes
????????
????????
SQL>