发现有的时候，EBS会报连接数不足的问题
发现有的时候，EBS会报连接数不足的问题。所以尝试着提高了processes和sessions，EBS安装完之后，数据库init参数processes默认为200,sessions默认为400.这里我把DB的processes和sessions提高到了500和1000。processes = 500 # Max. no. of users x 2
sessions = 1000 # 2 X processes
修改完之后，重启DB，参数就会生效。
addbctl.sh stop
addbctl.sh start
查看参数设置
show parameter processes
show parameter sessions
关于Processes和sessions parameters,init.ora有相关描述
#########
#
# Processes and sessions parameters
#
# A database process can be associated with one or more database
# sessions. For all technology stack components other than Oracle
# Forms, there is a one-to-one mapping between sessions and processes.
#
# For Forms processes, there will be one database session per
# open form, with a minimum of two sessions per Forms user (one
# for the navigator form, and one for the active form).
#
# The sessions parameter should be set to twice the value of the
# processes parameter.
#
#########
另外如何查询当下数据的连接数和最大连接数
1.--当前的连接数
2.select count(*) from v$process;3.--设置的最大连接数（默认值为200） 4.select value from v$parameter where name = 'processes';5.------------------------------------------------ 6.--查看当前的session使用情况 7.SELECTCount(*) FROM v$session;8.或
9.SELECT username, machine, program, status, COUNT (machine) AS10.FROM v$session11.GROUP BY username, machine, program, status12.ORDER BY machine;13.--查看系统最大session数 14.select value from v$parameter where name = 'sessions';
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