oracle 会话 死锁 执行sql 执行job的方法

//根据用户分组会话
select t.USERNAME,count(*) from v$session t group by t.USERNAME
//查找某一用户正在执行的sql_id值
select * from v$session t where t.USERNAME = 'BUDGET' and t.SQL_ID is not null
//查找对应sql_id的对应sql语句
select m.SQL_TEXT from v$session t , v$sqlarea m where t.USERNAME ='BUDGET' and t.sql_id = m.SQL_ID
//
select * from v$sqlarea t where t.SQL_ID = 'g92sy7kwt6mrq'
//查询死锁对象
select * from v$locked_object

1、修改Oracle最大连接数的方法

a、以sysdba身份登陆PL/SQL 或者 Worksheet
b、查询目前连接数
show parameter processes;
c、更改系统连接数
alter system set processes=1000 scope=spfile;
d、创建pfile
create pfile from spfile;
e、重启Oracle服务或重启Oracle服务器
2、查询Oracle游标使用情况的方法
select * from v$open_cursor where user_name = 'TRAFFIC'；
3、查询Oracle会话的方法
select * from v$session

杀掉会话：

方法一：SQL> SELECT pid,spid FROM V$PROCESS WHERE ADDR IN (SELECT PADDR FROM V$SESSION where username ='SYS');

PID SPID

---------- ------------

17 13657

ps -ef |grep 13657

kill -9 13657

方法二：

SQL> SELECT sid,serial# FROM V$SESSION WHERE sid in (SELECT distinct sid FROM V$MYSTAT);

SID SERIAL#

---------- ----------

1637 13894

alter system disconnect session '1637,13894' immediate;

执行这句会提示：ora-00031：标记要终止的会话。。。但是其实执行成功了。

如果用pl/sql登陆客户端那边会提示：ora-00028:您的会话已经被终止。

查看正在执行sql进度：

SELECT SE.SID,OPNAME,TRUNC(SOFAR / TOTALWORK * 100, 2) || '%' AS PCT_WORK,ELAPSED_SECONDS ELAPSED,ROUND(ELAPSED_SECONDS * (TOTALWORK - SOFAR) / SOFAR) REMAIN_TIME,SQL_TEXT

FROM V$SESSION_LONGOPS SL, V$SQLAREA SA, V$SESSION SE

WHERE SL.SQL_HASH_VALUE = SA.HASH_VALUE AND SL.SID = SE.SID AND SOFAR != TOTALWORK

ORDER BY START_TIME

SELECT a.tablespace_name "表空间名",round(total/1024/1024/1024,4) 表空间大小Gb,round(free/1024/1024/1024,4) 表空间剩余大小Gb,

round((total-free)/1024/1024/1024,4) 表空间使用大小Gb,ROUND((total-free)/total,4)*100 "使用率 %"

FROM (SELECT tablespace_name,SUM(bytes) free FROM DBA_FREE_SPACE

GROUP BY tablespace_name ) a,

(SELECT tablespace_name,SUM(bytes) total FROM DBA_DATA_FILES GROUP BY tablespace_name) b

WHERE a.tablespace_name=b.tablespace_name order by 5 desc

强制停止oracle正在执行的job：

1、查看所有job;

select * from dba_jobs;

2、查看正在运行的job;

select * from dba_jobs_running;

3、根据sid查出对应的session;

select SID,SERIAL# from V$Session where SID='&SID';

4、kill对应的session;

alter system kill session '&SID,&SERIAL';

5、将job置为broken;

exec dbms_job.broken('&JOB',true);

6、sysdba用户权限删除job;

delete from dba_jobs where JOB='&JOB';

---实在无奈时启动数据库