In order to build scalable applications, minimal connections should be used by the application, using a pre-spawned set of connections. DRCP works by creating a pool of dedicated servers which consist of a server foreground and a database session combined; a model that is referred to as pooled servers. Clients can connect and disconnect think PHP applications at will without the cost of creating a new server session - shared server removes the process creation cost but not the session creation cost. Upon a client request, the connection broker hands the client off to an available pooled server.
About Dedicated and Shared Server Processes
Implement both shared server and dedicated connections
Shared memory resources are preconfigured to allow the enabling of shared server at run time. You need not configure it by specifying parameters in your initialization parameter file, but you can do so if that better suits your environment. This section discusses how to enable shared server and how to set or alter shared server initialization parameters. It contains the following topics:. This is the only required parameter for using shared servers. Setting this parameter enables you to reserve user sessions for dedicated servers. This parameter can be ignored for now.
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All you need to know about Oracle Database licensing with VMware
Amazon EC2 Dedicated Hosts allow you to use your eligible software licenses from vendors such as Microsoft and Oracle on Amazon EC2, so that you get the flexibility and cost effectiveness of using your own licenses, but with the resiliency, simplicity and elasticity of AWS. An Amazon EC2 Dedicated Host is a physical server fully dedicated for your use, so you can help address corporate compliance requirements. In License Manager, you can specify your licensing terms for governing license usage, as well as your Dedicated Host management preferences for host allocation and host capacity utilization. Once setup, AWS takes care of these administrative tasks on your behalf, so that you can seamlessly launch virtual machines instances on Dedicated Hosts just like you would launch an EC2 instance with AWS provided licenses. This helps you to save money by leveraging your existing investments.
This chapter describes how to manage and monitor the processes of an Oracle Database instance and contains the following topics:. Oracle Database creates server processes to handle the requests of user processes connected to an instance. A server process can be either of the following:.