[20191113]oracle共享连接模式端口2.txt
--//昨天的测试链接：http://blog.itpub.net/267265/viewspace-2663651/=>[20191112]oracle共享连接模式端口.txt
--//链接里面还提到http://www.usn-it.de/index.php/2008/11/10/oracle-how-to-stop-a-mts-dispatcher-process/
--//可以执行如下，kill D000进程，自己也测试看看。
--//alter system shutdown immediate 'D000';
1.环境:
SYS@book> @ ver1
PORT_STRING VERSION BANNER
------------------------------ -------------- --------------------------------------------------------------------------------
x86_64/Linux 2.4.xx 11.2.0.4.0 Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
SYS@book> show parameter dispatchers
NAME TYPE VALUE
--------------- ------- -------------------------------------
dispatchers string (PROTOCOL=TCP) (SERVICE=book,bookXDB)
max_dispatchers integer
SYS@book> create pfile='/tmp/@.ora' from spfile;
File created.
--//保存1份pfile参数文件.
# netstat -tunlp | egrep "Active|Proto|ora_[ds]"
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 :::38229 :::* LISTEN 36466/ora_d000_book
udp 0 0 ::1:57385 :::* 36466/ora_d000_book
udp 0 0 ::1:11314 :::* 36468/ora_s000_book
2.kill d000:
SYS@book> alter system shutdown immediate 'D000';
System altered.
--//alert.log出现:
Wed Nov 13 08:34:13 2019
idle dispatcher 'D000' terminated, pid = (19, 1)
# netstat -tunlp | egrep "Active|Proto|ora_[ds]"
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
udp 0 0 ::1:11314 :::* 36468/ora_s000_book
# ps -ef | grep ora_[sd]000
oracle 36468 1 0 08:33 ? 00:00:00 ora_s000_book
--//ora_d000_book进程消失.等了N久也没有出现.
>sqlplus scott/book@192.168.100.78:1521/book
SCOTT@192.168.100.78:1521/book> @ spid
SID SERIAL# PROCESS SERVER SPID PID P_SERIAL# C50
---------- ---------- ------------------------ --------- -------------------- ------- ---------- -------------------------------------------------
267 3 7652:8308 DEDICATED 36540 19 3 alter system kill session '267,3' immediate;
--//可以发现这个时候登录选择的是DEDICATED模式.注意我这里配置book支持2种服务模式.
d:\tools\sqltemp>sqlplus -s -l scott/book@192.168.100.78:1521/book:SHARED
ERROR:
ORA-12520: TNS:listener could not find available handler for requested type of
server
SP2-0751: Unable to connect to Oracle. Exiting SQL*Plus
SYS@book> alter system shutdown immediate 'S000';
alter system shutdown immediate 'S000'
*
ERROR at line 1:
ORA-00127: dispatcher S000 does not exist
--//我以前的做法是kill ora_s000_book进程.
SYS@book> alter system set dispatchers='(PROTOCOL=TCP) (SERVICE=book,bookXDB)' scope=memory;
System altered.
# netstat -tunlp | egrep "Active|Proto|ora_[ds]"
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 :::53018 :::* LISTEN 36624/ora_d000_book
udp 0 0 ::1:51280 :::* 36624/ora_d000_book
udp 0 0 ::1:11314 :::* 36468/ora_s000_book
--//对比前面的测试监听端口发生了变化.
# ps -ef | grep ora_[sd]000
oracle 36468 1 0 08:33 ? 00:00:00 ora_s000_book
oracle 36624 1 0 08:44 ? 00:00:00 ora_d000_book
d:\tools\sqltemp>sqlplus -s -l scott/book@192.168.100.78:1521/book
@ spid
SID SERIAL# PROCESS SERVER SPID PID P_SERIAL# C50
---------- ---------- ------------------------ --------- -------------------- ------- ---------- --------------------------------------------------
281 7 7772:4532 SHARED 36468 20 1 alter system kill session '281,7' immediate;
--//可以发现这个时候登录选择的是SHARED模式.
--//换一句话讲这个修改dispatchers生效不需要重启服务.
3. 修改dispatchers参数:
alter system set dispatchers=
'(address=(partial=true)(protocol=tcp)(host=192.168.100.78)(port=30000))(dispatchers=1)(SERVICE=book,bookXDB)',
'(address=(partial=true)(protocol=tcp)(host=192.168.100.78)(port=30005))(dispatchers=1)(SERVICE=book,bookXDB)'
scope=memory sid='*';
--//注:scope=memory.
--//修改前:
# netstat -tunlp | egrep "Active|Proto|ora_[ds]"
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 :::53018 :::* LISTEN 36624/ora_d000_book
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
udp 0 0 ::1:51280 :::* 36624/ora_d000_book
udp 0 0 ::1:11314 :::* 36468/ora_s000_book
--//修改后:
# netstat -tunlp | egrep "Active|Proto|ora_[ds]"
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 192.168.100.78:30005 0.0.0.0:* LISTEN 36678/ora_d002_book
tcp 0 0 192.168.100.78:30000 0.0.0.0:* LISTEN 36676/ora_d001_book
tcp 0 0 :::53018 :::* LISTEN 36624/ora_d000_book
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
udp 0 0 ::1:40457 :::* 36678/ora_d002_book
udp 0 0 ::1:51280 :::* 36624/ora_d000_book
udp 0 0 ::1:64603 :::* 36676/ora_d001_book
udp 0 0 ::1:11314 :::* 36468/ora_s000_book
--//注意下划线的端口没有变化.
SYS@book> show parameter dispatchers
NAME TYPE VALUE
---------------- --------- ----------------------------------------------------------------------------------------------------
dispatchers string (PROTOCOL=TCP) (SERVICE=book,bookXDB), (address=(partial=true)(protocol=tcp)(host=192.168.100.78)(po
rt=30000))(dispatchers=1)(SERVICE=book,bookXDB), (address=(partial=true)(protocol=tcp)(host=192.168.
100.78)(port=30005))(dispatchers=1)(SERVICE=book,bookXDB)
max_dispatchers integer
--//有时候真心觉得oracle真变态,它是在原来基础上追加了参数dispatchers的内容.
SYS@book> show spparameter dispatchers
SID NAME TYPE VALUE
-------- --------------- -------- --------------------------------------
* dispatchers string (PROTOCOL=TCP) (SERVICE=book,bookXDB)
* max_dispatchers integer
--//继续测试:
alter system set dispatchers=
'(address=(partial=true)(protocol=tcp)(host=192.168.100.78)(port=30000))(dispatchers=1)(SERVICE=book,bookXDB)',
'(address=(partial=true)(protocol=tcp)(host=192.168.100.78)(port=30005))(dispatchers=1)(SERVICE=book,bookXDB)'
scope=both sid='*';
--//注:scope=both
SYS@book> show parameter dispatchers
NAME TYPE VALUE
---------------- ------- ----------------------------------------------------------------------------------------------------
dispatchers string (PROTOCOL=TCP) (SERVICE=book,bookXDB), (address=(partial=true)(protocol=tcp)(host=192.168.100.78)(po
rt=30000))(dispatchers=1)(SERVICE=book,bookXDB), (address=(partial=true)(protocol=tcp)(host=192.168.
100.78)(port=30005))(dispatchers=1)(SERVICE=book,bookXDB)
max_dispatchers integer
SYS@book> show spparameter dispatchers
SID NAME TYPE VALUE
-------- ---------------- -------- ----------------------------------------------------------------------------------------------------
* dispatchers string (PROTOCOL=TCP) (SERVICE=book,bookXDB)
* dispatchers string (address=(partial=true)(protocol=tcp)(host=192.168.100.78)(port=30000))(dispatchers=1)(SERVICE=book,bookXDB)
* dispatchers string (address=(partial=true)(protocol=tcp)(host=192.168.100.78)(port=30005))(dispatchers=1)(SERVICE=book,bookXDB)
* max_dispatchers integer
--//可以发现这样修改实际上是追加内容.oracle有时候难以理解.
4.连接测试:
d:\tools\sqltemp>sqlplus -s -l scott/book@192.168.100.78:30000/book @spid
SID SERIAL# PROCESS SERVER SPID PID P_SERIAL# C50
---------- ---------- ------------------------ --------- -------------------- ------- ---------- --------------------------------------------------
281 11 9076:7200 SHARED 36468 20 1 alter system kill session '281,11' immediate;
--//SERVER=SHARED,spid=36468
# ps -ef | grep 3646[8]
oracle 36468 1 0 08:33 ? 00:00:00 ora_s000_book
--//sqlplus scott/book@192.168.100.78:30005/book 也是ok的.
5.收尾还原:
--//略.
--//参考链接:http://blog.itpub.net/267265/viewspace-2663651/=>[20191112]oracle共享连接模式端口.txt
6.总结:
--//不需要重启参数dispatchers就能生效.
--//修改dispatchers参数,内容在原来基础上追加