实时查看tomcat并发连接数netstat -na | grep ESTAB | grep 8080 | wc -l

怎样查看oracle当前的连接数

SQL> select count(*) from v$session #当前的连接数 SQL> Select count(*) from v$session where status='ACTIVE' #并发连接数 SQL> select value from v$parameter where name = 'processes' --数据库允许的最大连接数 SQL> show parameter processes #最大连接  SQL> select username,count(username) from v$session where username is not null group by username; #查看不同用户的连接数

#修改最大连接数: alter system set processes = 300 scope = spfile;

#重启数据库: shutdown immediate; startup;

--查看当前有哪些用户正在使用数据 SELECT osuser, a.username,cpu_time/executions/1000000||'s', sql_fulltext,machine  from v$session a, v$sqlarea b where a.sql_address =b.address order by cpu_time/executions desc;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 Oracle日志查看