Oracle最大游标数控制

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* Oracle最大游标数控制 ******
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select * from v$session where username is not null

select username,count(username) from v$session where username is not null group by username --#查看不同用户的连接数

select count(*) from v$session --连接数

Select count(*) from v$session where status='ACTIVE'　--#并发连接数

show parameter processes --最大连接

alter system set processes = value scope = spfile;--重启数据库 #修改连接

show parameter open_cursors; --查看最大游标数

select count(*) from v$open_cursor; --查看当前游标数

select * from v$open_cursor;

SELECT * FROM V$OPEN_CURSOR O WHERE O.SID = (SELECT SID FROM (SELECT O.SID, OSUSER, MACHINE, COUNT(*) NUM_CURS
FROM V$OPEN_CURSOR O, V$SESSION S
WHERE O.SID=S.SID
GROUP BY O.SID, OSUSER, MACHINE
ORDER BY NUM_CURS DESC) T WHERE ROWNUM = 1);--查看最大回话跟着所有游标信息

select o.sid, osuser, machine, count(*) num_curs
from v$open_cursor o, v$session s
where user_name = 'LDDBA' and o.sid=s.sid
group by o.sid, osuser, machine
order by num_curs desc;

alter system set open_cursors=1000 scope=both; --修改Oracle最大游标数

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