查看存储过程,查看死锁进程语句,查询表占的空间,数据库链接

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

-- 得到全部的表名称 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' ;

-- 查全部的表 select * from user_tables ; -- 查全部的索引 select * from user_indexs ;

查询用户表的索引(非汇集索引): select * from user_indexes where uniqueness = 'NONUNIQUE ' 查询用户表的主键(汇集索引): 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使用状况top -查看磁盘空间使用率 df -h

--查看数据库链接数。

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';