ORA-12519: TNS:no appropriate service handler f...
2013-05-30 00:00
99 查看
有时候连得上数据库,有时候又连不上.
可能是数据库上当前的连接数目已经超过了它能够处理的最大值.
select
count
(
*
)
from
v$process
--
当前的连接数
select
value
from
v$parameter
where
name
=
'
processes
'
--
数据库允许的最大连接数
修改最大连接数:
alter
system
set
processes
=
300
scope
=
spfile;
重启数据库:
shutdown
immediate;
startup;
--
查看当前有哪些用户正在使用数据
SELECT
osuser, a.username,cpu_time
/
executions
/
1000000
||
'
s
'
, sql_fulltext,machine
from
v$session a, v$sqlarea b
where
a.sql_address
=
b.address
order
by
cpu_time
/
executions
desc
;
可能是数据库上当前的连接数目已经超过了它能够处理的最大值.
select
count
(
*
)
from
v$process
--
当前的连接数
select
value
from
v$parameter
where
name
=
'
processes
'
--
数据库允许的最大连接数
修改最大连接数:
alter
system
set
processes
=
300
scope
=
spfile;
重启数据库:
shutdown
immediate;
startup;
--
查看当前有哪些用户正在使用数据
SELECT
osuser, a.username,cpu_time
/
executions
/
1000000
||
'
s
'
, sql_fulltext,machine
from
v$session a, v$sqlarea b
where
a.sql_address
=
b.address
order
by
cpu_time
/
executions
desc
;
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