Figure4-1, "Oracle Database Dedicated Server Processes"illustrateshow dedicated server processes work. In this diagram two user processes areconnected to the database through dedicated server processes. Ingeneral, it is better to be connected through a dispatcher and use ashared server process. This...
OCM考试大纲中有Configure the database instance to support shared server connections 一栏,那今天就来配置一下Oracle shared server。 由上图可知,shared server进程主要通过disipatch进程进行派发,此进程起到了类似中间件的作用。采用shared server模式,可以最大程度的减少主机用户进程数(也就意味着shared server模式比...
在v$session里面,其SERVER的状态一般为SHARED和NONE, 为SHARED时,表示当前会话正在执行SQL语句,其占用共享服务器进程,会话的STATUS状态为ACTIVE;当会话状态STATUS处于INACITVE时,它的SERVER字段值一般为NONE,意味着此时并没有共享服务器进程服务该会话,这个详细请见v$session中server为none与shared值解析这篇博客。但是最近...
Ingeneral, it is better to be connected through a dispatcher and use ashared server process. This is illustrated inFigure4-2, "Oracle Database Shared Server Processes". A shared serverprocess can be more efficient because it keeps the number of processes requiredfor the running instance low. ...
我们知道当ORACLE数据库启用共享服务器模式时,通过共享服务器模式连接到数据库的会话是有一些特征的。在v$session里面,其SERVER的状态一般为SHARED和NONE, 为SHARED时,表示当前会话正在执行SQL语句,其占用共享服务器进程,会话的STATUS状态为ACTIVE;当会话状态STATUS处于INACITVE时,它的SERVER字段值一般为NONE,意味着此时并...
（2）Asharedserverprocess,whichcanservicemultipleuserprocesses Oracle创建Serverprocess来处理userprocesses连接实例的的请求。serverprocess分两种：dedicatedserverprocess和sharedserverprocess。 Yourdatabaseisalwaysenabledtoallowdedicatedserverprocesses,butyoumustspecificallyconfigureandenablesharedserverbysettingoneormore...
In a shared server environment, adispatcher process (Dnnn)directs multiple incoming network session requests to a pool ofshared server processes (Snnn). You can create multiple dispatcher processes for a single database instance. TheOracle Net Listenerprocess establishes a connection to the dispatcher...
1、shared server 使用与配置Dedicated Server Process客户端连接只需建立一次 tcp : 但根据在实际实验时看到的现象, dedicated server process 并不是 listener 的子进程,如下所示:$ ps -ef | grep oracleoracle 3242 3201 0 03:52 pts/000:00:00 sqlplus (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq) ...
LOCAL SERVERThe command completed successfully 现在我们要设置一下共享服务器,这里我们只要设置DISPATCHERS参数:sys@GT10G> alter system set DISPATCHERS = "(PROTOCOL=TCP)(DISPATCHERS=3)(PROTOCOL=IPC)(DISPATCHERS=1)"; System altered. 我们首先从监听状态和信息来看下前后的不同:[oracle@test ~]$ lsnrctl...
shared server使用与配置 Dedicated Server Process 客户端连接只需建立一次tcp: 但根据在实际实验时看到的现象,dedicated server process并不是listener的子进程,如下所示: $ ps -ef | grep oracle oracle 3242 3201 0 03:52 pts/0 00:00:00 sqlplus (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))...