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深圳建站公司推荐,如何利用ps做网站,wordpress安装不上,七星互联免费主机需要定时kill非inactive session，一种做法是通过编写脚本or脚本定时运行,从而实现该功能;另外一种方法是通过设置profile中的idle_time来实现该功能,但是这其中有两个细节问题需要注意：1.v$session.statusSNIPED最好做清理，2.未提交事务超时可…

需要定时kill非inactive session，一种做法是通过编写脚本or脚本定时运行,从而实现该功能;另外一种方法是通过设置profile中的idle_time来实现该功能,但是这其中有两个细节问题需要注意：1.v$session.status=SNIPED最好做清理，2.未提交事务超时可能强制回滚
使用ORACLE PROFILE准备

SQL> CREATE PROFILE KILLIDLE LIMIT IDLE_TIME 1;

Profile created.

SQL> select * from dba_profiles where profile='KILLIDLE';

PROFILE RESOURCE_NAME RESOURCE LIMIT

------------------------------ -------------------------------- -------- ------------

KILLIDLE COMPOSITE_LIMIT KERNEL DEFAULT

KILLIDLE SESSIONS_PER_USER KERNEL DEFAULT

KILLIDLE CPU_PER_SESSION KERNEL DEFAULT

KILLIDLE CPU_PER_CALL KERNEL DEFAULT

KILLIDLE LOGICAL_READS_PER_SESSION KERNEL DEFAULT

KILLIDLE LOGICAL_READS_PER_CALL KERNEL DEFAULT

KILLIDLE IDLE_TIME KERNEL 1

KILLIDLE CONNECT_TIME KERNEL DEFAULT

KILLIDLE PRIVATE_SGA KERNEL DEFAULT

KILLIDLE FAILED_LOGIN_ATTEMPTS PASSWORD DEFAULT

KILLIDLE PASSWORD_LIFE_TIME PASSWORD DEFAULT

KILLIDLE PASSWORD_REUSE_TIME PASSWORD DEFAULT

KILLIDLE PASSWORD_REUSE_MAX PASSWORD DEFAULT

KILLIDLE PASSWORD_VERIFY_FUNCTION PASSWORD DEFAULT

KILLIDLE PASSWORD_LOCK_TIME PASSWORD DEFAULT

KILLIDLE PASSWORD_GRACE_TIME PASSWORD DEFAULT

16 rows selected.

SQL> ALTER USER CHF PROFILE KILLIDLE;

User altered.

SQL> SELECT USERNAME,PROFILE FROM DBA_USERS where username='CHF';

USERNAME PROFILE

------------------------------ ------------------------------

CHF KILLIDLE

SQL> SHOW PARAMETER resource_limit

NAME TYPE VALUE

------------------------------------ ----------- ---------------

resource_limit boolean FALSE

SQL> ALTER SYSTEM SET resource_limit=TRUE;

System altered.

如果要profile生效,需要修改resource_limit=true,IDLE_TIME单位为分钟

测试IDLE_TIME

--session 1

SQL> show user;

USER is "CHF"

SQL> select * from t_xifenfei;

ID

----------

1

--删除一条记录

SQL> delete from t_xifenfei;

1 row deleted.

--查询sid

SQL> select sid from v$mystat where rownum=1;

SID

----------

20

--开始不操作该会话时间

SQL> select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual;

TO_CHAR(SYSDATE,'YY

-------------------

2013-02-12 22:30:02

--session 2

SQL> show user;

USER is "SYS"

--查询时间

SQL> select status,to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from v$session where sid=20;

STATUS TO_CHAR(SYSDATE,'YY

-------- -------------------

INACTIVE 2013-02-12 22:31:00

--session 1

SQL> select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual;

select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual

*

ERROR at line 1:

ORA-02396: exceeded maximum idle time, please connect again

----已经报会话超时

--session 2

SQL> select status,to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from v$session where sid=20;

STATUS TO_CHAR(SYSDATE,'YY

-------- -------------------

SNIPED 2013-02-12 22:34:40

----会话状态为sniped

--session 1

SQL> conn chf/xifenfei

Connected.

SQL> select * from t_xifenfei;

ID

----------

1

----事务回滚

SNIPED – An inactive session that has exceeded some configured limits (for example, resource limits specified for the resource manager consumer group or idle_time specified in the user’s profile). Such sessions will not be allowed to become active again.
因为SNIPED的session只有当该session的终端发一个连接信息给数据库，然后终端才会终止连接，如果该客户端一直不发送类似访问，则该连接一直存在，数据库就很可能因为会话数目超过了数据库参数配置从而出现了ORA-00018错误，业务不能正常运行.出现该问题可以通过如下脚本kill -9 pid解决

kill SNIPED session 脚本

#!/bin/sh

tmpfile=/tmp/.kill_sniped

sqlplus system/manager <<EOF

spool $tmpfile

select p.spid from v\$process p,v\$session s

where s.paddr=p.addr

and s.status='SNIPED';

spool off

EOF

for x in `cat $tmpfile | grep "^[0123456789]"`

do

kill -9 $x