windows server 2008 oracle 11.02.04
需要先建数据库,再配置Net Configuration Assistant
【链接】oracle入门很简单:四、本地Net服务名配置
http://blog.csdn.net/j958703732/article/details/10901571
“imp kang/[email protected]/ORACLE file="C:\daochu.dmp"full=y ignore=y”
create tablespace OracleTest logging datafile ‘C:\oracle\product\10.2.0\oradata\ORCLTEST\OracleTest.dbf‘ size 32m autoextend on next 32m
SQL:
1. 查看当前的数据库连接数
select count(*) fromv$process
select count(*) from v$process where program=‘Oracle.EXE(SHAD)’;
2. 查看数据库允许的最大连接数
select value from v$parameter where name =‘processes‘
3. 查看当前有哪些用户正在使用数据
SELECT osuser, a.username,cpu_time/executions/1000000||‘s‘,b.sql_text,machine
from v$session a, v$sqlareab
where a.sql_address =b.address order by cpu_time/executionsdesc;
4. 查看当前的session连接数
select count(*) fromv$session
5. 查看并发连接数
select count(*) from v$session where status=‘ACTIVE‘
命令:
1. 查看最大连接数
show parameter processes
2. 修改最大连接数
alter system set processes = 300 scope = spfile;
3. 重启数据库
shutdown immediate;
startup;