Oracle11gR2设置连接数process与会话session值

近日构建的Web应用用户数量有所上升，后台总是打印无法打开数据库连接的错误信息；

000000a3 SystemOut     O 2016 9月 28 08:59:24,486 ERROR  -  msg:打开数据库出错.

经查询发现需要更改数据库的连接进程数，修改方法如下：

1、以管理员身份登录sqlplus

win+R，输入cmd，然后回车。

在命令行中输入：sqlplus / as sysdba

2、查看连接进程数量设置值

命令：show parameter processes;

3、查看会话数量设置值

命令：show parameter sessions;

4、修改连接进程数量设置值

命令：alter system set processes=5000 scope=spfile;

操作记录：

C:\Users\Administrator>sqlplus / as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on 星期三 9月 28 11:57:26 2016

Copyright (c) 1982, 2010, Oracle.  All rights reserved.

连接到:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> show parameter processes;

NAME                                 TYPE
------------------------------------ ----------------------
VALUE
------------------------------
aq_tm_processes                      integer
0
db_writer_processes                  integer
1
gcs_server_processes                 integer
0
global_txn_processes                 integer
1
job_queue_processes                  integer

NAME                                 TYPE
------------------------------------ ----------------------
VALUE
------------------------------
1000
log_archive_max_processes            integer
4
processes                            integer
150
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

NAME                                 TYPE
------------------------------------ ----------------------
VALUE
------------------------------
50
session_max_open_files               integer
10
sessions                             integer
248
shared_server_sessions               integer

SQL> alter system set processes=600 scope=spfile;

系统已更改。

操作结果：

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

NAME                                 TYPE
------------------------------------ ----------------------
VALUE
------------------------------
50
session_max_open_files               integer
10
sessions                             integer
924
shared_server_sessions               integer

SQL> show parameter processes;

NAME                                 TYPE
------------------------------------ ----------------------
VALUE
------------------------------
aq_tm_processes                      integer
0
db_writer_processes                  integer
1
gcs_server_processes                 integer
0
global_txn_processes                 integer
1
job_queue_processes                  integer

NAME                                 TYPE
------------------------------------ ----------------------
VALUE
------------------------------
1000
log_archive_max_processes            integer
4
processes                            integer
600
SQL>