1、查询Oracle并发数、会话数、连接数:
select count(*) from v$session #当前的连接数select count(*) from v$session where status='ACTIVE' #并发连接数select value from v$parameter where name = 'processes' #数据库允许的最大连接数show parameter processes #最大连接select username,count(username) from v$session where username is not null group by username; #查看不同用户的连接数
2、查询、修改最大连接数
alter system set processes = 300 scope = spfile;#注意:修改后需要重启数据库才能生效#通过控制台进入SQL窗口sqlplus / as sysdbashutdown immediate;startup;
3、查看oracle日志路径
select * from v$logfile;
4、查询最近所有的SQL操作
select * from v$sql;