数据库ORA-12519: TNS:no appropriate service handler found
2016-10-19 00:00
621 查看
现象:oracle数据库 有人可以连上,有人不行,有时可以连上,有时候又报标题的错误信息。
cmd 下 输入sqlplus /nolog
sql> conn / as sysdba;
sql> select count(*) from v$process --当前的连接数
sql> select value from v$parameter where name = 'processes' --数据库允许的最大连接数
发现最大连接数是150 ,当前连接数是148, 所以会导致有人可以连上,有人不行,有时可以连上,有时候又报标题的错误信息。
解决方案:
修改最大连接数:
alter system set processes = 300 scope = spfile;
重启数据库:
shutdown immediate;
startup;
ps:
--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;
cmd 下 输入sqlplus /nolog
sql> conn / as sysdba;
sql> select count(*) from v$process --当前的连接数
sql> select value from v$parameter where name = 'processes' --数据库允许的最大连接数
发现最大连接数是150 ,当前连接数是148, 所以会导致有人可以连上,有人不行,有时可以连上,有时候又报标题的错误信息。
解决方案:
修改最大连接数:
alter system set processes = 300 scope = spfile;
重启数据库:
shutdown immediate;
startup;
ps:
--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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