14September 2020

Everything You Need To Learn About Oracle Database Server Architecture

In the modern situation database management system has become a critical thing used by both small and large-scale enterprises. The foremost reason for the constant usage of the data management system is for a systematic exchange of information and data. Conventional approaches are not relevant anymore. This is why modern data management systems have gained utmost popularity. Oracle database software and technologies have come out as the best solution for this. To know more about this the students can take Oracle Assignment Help online from the experts at BookMyEssay.

Today, in this blog, we are going to introduce you to the Oracle Database Server Architecture. If you are not already familiar with it then read further.

An Introduction To Oracle Database Server Architecture

When we talk about Oracle Database Server Architecture, it has three main structures: memory structures, storage structures, and process structures. A fundamental Oracle database system comprises of a database instance and oracle database. There are both logical and physical structure in database and these are separate. Due to which, the physical data storage can be handled affecting the logical storage structure access.

The instance includes background processes and memory structures linked with that particular instance. Every time an instance is started, a shared memory space which is known as the System Global Area (SGA) is allotted, and at the same time, the background processes are begun. Processes can be considered as functions that run in the computers’ memory.

A process can be interpreted as a “thread of control” or a tool in an operating system. This is capable to run a sequence of steps. After beginning a database instance, the Oracle software links the instance with a particular physical database, and this entire process is known as mounting the database. The database becomes prepared to be opened which makes it accessible to authorized users. If you want to learn more about its connection to database instance then consider taking assignment assistance in Hang Kong from the experts.

How Oracle Database Memory Structures Work?

Oracle Database formulates and utilizes memory structures for multiple purposes. For instance; data being distributed with users, memory reserves program code being executed, and separate data fields for every related user. There are two primary memory structures connected with an instance:

System Global Area (SGA): A group of allotted memory structures is called SGA elements. It includes data and control information for a single Oracle Database instance. The SGA is shared through all background processes and servers. Models of data collected in the SGA involve shared SQL areas and cached data blocks. SGA includes:

  • Shared Pool
  • Large Pool
  • Database Buffer Cache
  • Java Pool
  • Fixed SGA
  • Redo Log Buffer
  • Stream Pool

Program Global Areas (PGA): Memory areas that include control and data information for background process and server. A Program Global Areas is a non-shared concept built by Oracle Database. These are created while a background process and the server starts working. Access to the Program Global Areas is restricted to the server process. Every background process and server process has its Program Global Areas. 

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