查看存储过程,查看死锁进程语句,查询表占的空间,数据库连接

摘要: 查看存储过程,查看死锁进程语句,查询表占的空间,数据库连接

-- 查看数据库的存储过程
select * from user_procedures ;

-- 获得所有的表名称
select * from user_tab_comments ;
-- 查看数据库的存储过程
select * from user_procedures ;
-- 查看存储过程的内容
select text from user_source where name = 'GETCOMCODE' ;

-- 查所有的表
select * from user_tables ;
-- 查所有的索引
select * from user_indexs ;

查询用户表的索引(非聚集索引):
select * from user_indexes
where uniqueness = 'NONUNIQUE '
查询用户表的主键(聚集索引):
select * from user_indexes
where uniqueness = 'UNIQUE '

--查找死锁的进程：
SELECT s.username,
l.OBJECT_ID,
l.SESSION_ID,
s.SERIAL#,
l.ORACLE_USERNAME,
l.OS_USER_NAME,
l.PROCESS
FROM V$LOCKED_OBJECT l, V$SESSION S
WHERE l.SESSION_ID = S.SID;

--查询发生死锁的select语句

select sql_text
from v$sql
where hash_value in
(select sql_hash_value
from v$session
where sid in (select session_id from v$locked_object))

--kill掉这个死锁的进程：
alter system kill session 'sid,serial#';

select t2.username,t2.sid,t2.serial#,t2.logon_time,t3.sql_text
from v$locked_object t1,v$session t2,v$sqltext t3
where t1.session_id=t2.sid
and t2.sql_address=t3.address --and t3.sql_text like 'update%'
order by t2.logon_time;

--查询锁表语句
SELECT l.session_id sid, s.serial#, l.locked_mode,l.oracle_username,

　　l.os_user_name,s.machine, s.terminal, o.object_name, s.logon_time

　　FROM v$locked_object l, all_objects o, v$session s

　　WHERE l.object_id = o.object_id

　　AND l.session_id = s.sid

　　ORDER BY sid, s.serial# ;

数据库io最大的sql

-查看内存 free -m
-查看CPU使用情况top
-查看磁盘空间使用率 df -h

--查看数据库连接数。

select num_rows * avg_row_len
from user_tables
where table_name = 'SAREALPAYFEE'

select count() from v$session;
select count() from v$process;
select value from v$parameter where name ='processes';
select count(*) from v$session where status='ACTIVE';