ORA-00020:maximum number of processes 不能停机怎么办
最近刚换了工作,不过还好,还是老本行,数据库的运维工作。比较郁闷的就是摊上了升级,后台那个报错啊!先说一下ora-00020报错吧
最近刚换了工作,不过还好,还是老本行,数据库的运维工作。比较郁闷的就是摊上了升级,,后台那个报错啊!
先说一下ora-00020报错吧!大家都知道原因,就是进程数达到上限了。
select count(*) from v$process;
show parameter processes
两个值已经无限接近或相同了。
对停机要求不高的数据库来说非常容易,那就是修改一下参数processes的值就好了,具体流程如下:
alter system set processes=2000 scope=spfile;
shutdown immediate
startup
show parameter processes
查看值是否改变成功就好了,那么要是不能停机怎么办啊
我就比较悲剧的遇到了这种情况,还在郁闷中,不过为了系统的正常运行,还是做了一些工作,正常工作是祖宗啊!
查询一下现在的进程数:
select count(*) from v$session;
查看inactive的进程数量:
select count(*) from v$session where status='INACTIVE';
查看哪些用户下出现的INACTIVE最多
select username,count(*) from v$session where status='INACTIVE' group by username;
还好我的系统存在大量的INACTIVE 的连接,那就删呗,其实我也不知这样会不会对其他造成大的影响,和领导说明,不过还是决定删除。
declare cursor mycur is
select b.sid,b.serial# from v$session b where b.username= '用户名' and b.STATUS = 'INACTIVE';
begin
for cur in mycur
loop
execute immediate ( 'alter system kill session '''||cur.sid || ','|| cur.SERIAL# ||''' ');
end loop;
end;
小心哦!领导同意的情况下可以这样。
相关阅读:
Oracle ORA-01555 快照过旧 说明
ORA-01078 和 LRM-00109 报错解决方法
ORA-01555超长的Query Duration时间
ORA-00471 处理方法笔记
ORA-00314,redolog 损坏,或丢失处理方法
ORA-00257 归档日志过大导致无法存储的解决办法

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