oracle技术之提高短连接性能方法测试
创建测试脚本
通过在三个会话中同时执行test_login.sh脚本,模拟当数据库多个短连接情况性能
[oracle@xifenfei tmp]$ more test_login.sh
#!/bin/bash
echo "start login database `date`*********" >>/tmp/test_1.log
e=2000
for((i=1;i<=$e;i=i+1))
do
/tmp/login_oracle.sh
done
echo "end login database `date`*********" >>/tmp/test_1.log
[oracle@xifenfei tmp]$ more login_oracle.sh
#!/bin/bash
sqlplus chf/xifenfei@ORA11G_P</dev/null
select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual;
exit
XFF
--ORA11G_P根据不同的测试情景指定不同名称
情况1:一个监听情况下
start login database Tue May 1 18:03:32 CST 2012*********
start login database Tue May 1 18:03:35 CST 2012*********
start login database Tue May 1 18:03:37 CST 2012*********
end login database Tue May 1 18:08:20 CST 2012*********
end login database Tue May 1 18:08:25 CST 2012*********
end login database Tue May 1 18:08:26 CST 2012*********
--计算2000个会话登录/查询/推出时间
4:48
4:40
4:49
情况2:三个监听,客户端配置tns负载均衡
--监听配置
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.10)(PORT = 1521))
)
)
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = ora11g)
(ORACLE_HOME = /u01/oracle/oracle/product/11.2.0/db_1)
(SID_NAME = ora11g)
)
)
ADR_BASE_LISTENER = /u01/oracle
LISTENER1 =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.10)(PORT = 1522))
)
)
SID_LIST_LISTENER1 =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = ora11g)
(ORACLE_HOME = /u01/oracle/oracle/product/11.2.0/db_1)
(SID_NAME = ora11g)
)
)
ADR_BASE_LISTENER1 = /u01/oracle
LISTENER2 =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.10)(PORT = 1523))
)
)
SID_LIST_LISTENER2 =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = ora11g)
(ORACLE_HOME = /u01/oracle/oracle/product/11.2.0/db_1)
(SID_NAME = ora11g)
)
)
ADR_BASE_LISTENER2 = /u01/oracle
--tns配置
ORA11G_M =
(DESCRIPTION =
(LOAD_BALANCE=ON)
(FAILOVER=ON)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.10)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.10)(PORT = 1522))
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.10)(PORT = 1523))
(LOAD_BALANCE = yes)
)
(CONNECT_DATA =
(SERVER=DEDICATED)
(SERVICE_NAME = ora11g)
)
)
--测试结果
start login database Tue May 1 17:51:45 CST 2012*********
start login database Tue May 1 17:51:49 CST 2012*********
start login database Tue May 1 17:51:51 CST 2012*********
end login database Tue May 1 17:55:58 CST 2012*********
end login database Tue May 1 17:56:06 CST 2012*********
end login database Tue May 1 17:56:09 CST 2012*********
--计算2000个会话登录/查询/推出时间
4:13
4:17
4:18
情况2:使用常驻连接池DRCP(11g新特性)
--启动默认DRCP
SQL> exec dbms_connection_pool.start_pool();
PL/SQL procedure successfully completed.
--tns配置
ORA11G_P =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.10)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER=POOLED) --注意
(SERVICE_NAME = ora11g)
)
)
--执行结果
start login database Tue May 1 18:19:58 CST 2012*********
start login database Tue May 1 18:20:01 CST 2012*********
start login database Tue May 1 18:20:03 CST 2012*********
end login database Tue May 1 18:23:16 CST 2012*********
end login database Tue May 1 18:23:19 CST 2012*********
end login database Tue May 1 18:23:21 CST 2012*********
--计算2000个会话登录/查询/推出时间
3:16
3:18
3:19
总结
如果在数据库短连接过程中发现监听是瓶颈的时候,可以考虑使用多个监听+tns 负载均衡,从一定程度上缓解监听瓶颈.如果是11g数据库可以考虑使用其心功能DRCP,从而很大程度上提高短连接过程中数据库的效率.因为DRCP还属于11g的新功能稳定性不知道如何?使用该功能前,请一定要做好相关测试工作.如有可能还是建议从应用层面尽可能的使用长连接,提高数据库会话效率.
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