Oracle starts a certain
number of each based on the initialization parameter SHARED_SERVERS that specifies
the minimum number of shared servers. Oracle can start additional shared
servers up to the value of an optionally specified initialization parameter MAX_
SHARED_SERVERS. If Oracle starts additional processes to handle a heavier request
load and the load dies down again, Oracle gradually reduces the number of processes
to the floor specified by SHARED_SERVERS.
Accessing a Database | 75
The following steps show how establishing a connection and using shared server
processes differ from using a dedicated server process:
1. The client contacts the Listener over the network.
2. The Listener detects an incoming request and, based on the Oracle Net configuration,
determines that it is for a multithreaded server. Instead of handing the
client off to a dedicated server, the Listener hands the client off to a dispatcher
for the network protocol the client is using.
3. The Listener introduces the client and the dispatcher by letting each know the
other??™s network address.
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