1.查看现在的链接数
select count(*) from v$process --当前正在使用的
2.查看session的参数值
3.查看历史session
select to_char(SAMPLE_TIMe, 'yyyymmdd hh24:mi'),session_type,module,PROGRAM ,machine,
count(*)
from sys.GV_$ACTIVE_SESSION_HISTORY s
where SAMPLE_TIMe >=sysdate-30
and SAMPLE_TIMe < sysdate
and session_type<>'BACKGROUND'
group by to_char(SAMPLE_TIMe, 'yyyymmdd hh24:mi'),session_type,module,PROGRAM,machine
order by 1;
4. 查看procress参数值
show parameter processes
或
select value from v$parameter where name = 'processes' --数据库允许的最大连接数
5.执行语句
alter system set processes=1000 scope=spfile;
alter system set sessions=1105 scope=spfile;
6. 修改完成后重启数据库:
shutdown immediate; -- abort;
startup;