What is Oracle architecture with diagram?
There are three major structures in Oracle Database server architecture: memory structures, process structures, and storage structures. A basic Oracle database system consists of an Oracle database and a database instance. The database consists of both physical structures and logical structures.
What architecture does Oracle use?
An Oracle Real Application Clusters (Oracle RAC) database architecture consists of multiple instances that run on separate server machines. All of them share the same database. The cluster of server machines appear as a single server on one end, and end users and applications on the other end.
What are the components of SGA?
The SGA contains the following data structures: Database buffer cache….Automatically Managed SGA Components
- The shared pool (for SQL and PL/SQL execution)
- The Java pool (for Java execution state)
- The large pool (for large allocations such as RMAN backup buffers)
- The buffer cache.
- The Streams pool.
What are the three 3 major components of Oracle database?
A Database Instance is an interface between client applications (users) and the database. An Oracle instance consists of three main parts: System Global Area (SGA), Program Global Area (PGA), and background processes.
What is difference between Oracle and SQL?
Oracle is owned by Oracle Corporation and can run on a wide variety of platforms such as Windows, Linux, Solaris, HP-UX, and OS-X. Oracle supports PL/SQL and SQL language to write queries to access data from its database. SQL Server is owned by Microsoft and can only be used on the Windows platform.
What is difference between SGA and PGA in Oracle?
The SGA is a group of shared memory structures, known as SGA components, that contain data and control information for one Oracle Database instance. A PGA is a nonshared memory region that contains data and control information exclusively for use by an Oracle process.
What is the architecture of an Oracle Server?
The architecture includes physical components, memory components, processes, and logical structures. The figure shown above details the Oracle architecture. Oracle server: An Oracle server includes an Oracle Instance and an Oracle database.
What kind of SGA does Oracle 11g use?
Early versions of Oracle used a Static SGA. This meant that if modifications to memory management were required, the database had to be shutdown, modifications were made to the init.ora parameter file, and then the database had to be restarted. Oracle 11g uses a Dynamic SGA.
What makes up the physical layer of the Oracle Database?
The Oracle database has a logical layer and a physical layer. The physical layer consists of the files that reside on the disk; the components of the logical layer map the data to these physical components. One or more datafiles–Datafiles store the information contained in the database.
What is Automatic Storage Management ( ASM ) in Oracle 10g?
Automatic Storage Management (ASM): Oracle recommended storage option which is optimized for cluster file system for Oracle database files introduced in Oracle 10g.
