When setting up an Oracle database, you should see such an option in the database creation assistant wizard, which is the way the database connection mode is used. In Oracle9i or 10g, you can see that there are two connection modes, one is called dedicated server connection dedicated server , the other is called shared server connection shared server. Let's talk about the differences between the two connection methods. The dedicated server mode means that every time you access Oracle, the Listener of the Oracle server will get the access request, and then create a new process for the access to serve. Therefore, for each client access, a new process will be generated to serve, which is a kind of one-to-one mapping relationship. A very important feature of this connection mode is that UGA user global domain is stored in PGA process global domain. This feature also shows that the current user's memory space is allocated according to the process.
Dedicated Server Processes
Just for myself (Shared server vs Dedicated)
Tags: Database. You must only make sure that the file has adequate protection and it is up to the local administrator and the client do not open a session using the local administrator account. Alternatively, you can put the tnsnames. Note that Oracle does not support this procedure. But it will work.
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The shared server architecture enables a database server to allow many user processes to share very few server processes, so the number of users that can be supported is increased. With shared server, many user processes connect to a dispatcher. The dispatcher directs multiple incoming network session requests to a common queue. An idle shared server process from a shared pool of server processes picks up a request from the queue. This means a small pool of server processes can serve a large number of clients. Shared memory resources for dispatchers, virtual circuits, and shared servers are preconfigured to allow the enabling of shared servers at runtime. In configurations in which client load is causing a strain on memory and other system resources, database administrators can remedy load issues by starting shared server resources. You configure a protocol address with one of the following attributes:. You want to configure one or more of the optional dispatcher attributes:. After setting this parameter, you do not need to restart the instance.