1、查看已存在的进程数
SQL> select count(*) from v$process;
COUNT(*)
----------
293
2、查看数据库配置的进程数量
SQL> select value from v$parameter where name = ’processes’;
VALUE
--------------------------------------------------------------------------------
300
SQL>
3、根据实际情况更改进程数
alter system set processes=500 scope=spfile;
需重启数据库
或
ps -ef|grep $ORACLE_SID|grep -v grep| grep LOCAL=NO| awk ’{print $2}’| xargs kill -9
该方法会把已连接的用户也给kill，要小心使用。需要自己知道在干什么，不然小心使用。
===================
select count(*) from v$session
Select count(*) from v$session where status='ACTIVE'
show parameter processes
select count(*) from v$process;
select value from v$parameter where name = 'processes';
alter system set processes=500 scope=spfile;
=============================================
1 创建表空间
CREATE TABLESPACE CPORTAL LOGGING DATAFILE '/dev/raw/raw1' SIZE 30000M REUSE EXTENT MANAGEMENT LOCAL
2 创建用户
CREATE USER CPORTAL PROFILE DEFAULT IDENTIFIED BY CPORTAL DEFAULT
TABLESPACE CPORTAL TEMPORARY TABLESPACE TEMP ACCOUNT UNLOCK;
GRANT CONNECT TO CPORTAL;
GRANT RESOURCE TO CPORTAL;
3 参数修改
ALTER SYSTEM SET sga_target = 1000M SCOPE=SPFILE;
ALTER SYSTEM SET pga_aggregate_target = 200M SCOPE=SPFILE;
ALTER SYSTEM SET OPEN_CURSORS=500 SCOPE=SPFILE;
ALTER SYSTEM SET processes=200 SCOPE=SPFILE;
ALTER SYSTEM SET remote_login_passwordfile = NONE SCOPE=SPFILE;
create pfile from spfile;
-- ==============================================================
-- Modify the other oracle parameter! --
-- ==============================================================
ALTER DATABASE TEMPFILE '/opt/oracle/oradata/cportal/temp01.dbf' RESIZE 1024M;
ALTER DATABASE DATAFILE '/opt/oracle/oradata/cportal/undotbs01.dbf' RESIZE 1024M;
ALTER DATABASE DATAFILE '/opt/oracle/oradata/cportal/undotbs01.dbf' AUTOEXTEND ON MAXSIZE 10240M
4 查看表空间名称和大小
select t.tablespace_name,round(sum(bytes/(1024*1024)),0) ts_size from dba_tablespaces t dba_data_files d
where t.tablespace_name = d.tablespace_name
group by t.tablespace_name;
5 查看表空间的使用情况
select sum(bytes)/(1024*1024) as free_space,tablespace_name
from dba_free_space
group by tablespace_name;
6、查看表空间物理文件的名称及大小
select tablespace_name, file_id, file_name,
round(bytes/(1024*1024),0) total_space
from dba_data_files
order by tablespace_name;
7、查看数据库库对象
select owner, object_type, status, count(*) count# from all_objects group by owner, object_type, status;
8、查看控制文件
select name from v$controlfile；
9、查看日志文件
select member from v$logfile；
10 .结束用户会话
alter system kill session 'SID,SERIAL#';
select sid,serial#,username,program,machine,status from v$session;
