Skip to main content

What is SGA (Shared Global Area) in ORACLE Databae?

In the database management systems developed by the Oracle Corporation, the System Global Area (SGA) forms the part of the system memory (RAM) shared by all the processes belonging to a single Oracle database instance. The SGA contains all information necessary for the instance operation.
In general, the SGA consists of the following:
  • dictionary cache: information about data dictionary tables, such as information about account, datafile, segment, extent, table and privileges
  • redo log buffer: containing information about committed transactions that the database has not yet written to online redo log files
  • the buffer_cache or "database buffer cache": holds copies of data blocks read from datafiles
  • shared pool, the cache of parsed commonly used SQL statements, and also the data-dictionary cache containing tables, views and triggers
  • Java pool, for parsing Java statements.
  • large pool (including the User Global Area (UGA))
Labels:

Comments

Post a Comment

Popular posts from this blog

Exp/ Imp vs. ExpDP/ ImpDP in Oracle 10g

ORACLE Export (exp) vs Datapump (expdp)    ORACLE provides two external utilities to transfer database objects from one database to another database. Traditional exports (exp /imp) are introduced before 10g. Then from 10g, ORACLE introduced datapump (expdp / impdp) as an enhancement to traditional export utility. Traditional Export (exp/ imp) This is an ORACLE database external utility, which is used to transfer database objects from one database server to another database server. It allows transferring the database objects over different platforms, different hardware and software configurations. When an export command is executed on a database, database objects are extracted with their dependency objects. That means if it extracts a table, the dependences like indexes, comments, and grants are extracted and written into an export file (binary format dump file). Following is the command to export a full database, Cmd > exp userid=username/password@exportdb_...
Post a Comment
Read more

Hi! I'm Java...

Java is a computer programming language. It enables programmers to write computer instructions using English based commands, instead of having to write in numeric codes. It’s known as a “high-level” language because it can be read and written easily by humans. Like English, Java has a set of rules that determine how the instructions are written. These rules are known as its “syntax”. Once a program has been written, the high-level instructions are translated into numeric codes that computers can understand and execute. Who Created Java? In the early nineties, Java was created by a team led by James Gosling for Sun Microsystems. It was originally designed for use on digital mobile devices, such as cell phones. However, when Java 1.0 was released to the public in 1996, its main focus had shifted to use on the Internet. It provided more interactivity with users by giving developers a way to produce animated webpages . Over the years it has evolved as a successful language for ...
1 comment
Read more

Setting up OpenGL environment for Microsoft Visual C++

Hi Friends, before starting the setting up OpenGL environment, please do the following first: 1.       Install Microsoft Visual C++ 6.0 (Comes with Ms Visual Studio 6.0) 2.       Download the file called “opengl95.exe” and “glutdlls.zip” from internet. [Just open browser-> navigate http://www.google.com -> type upper mentioned file name and search -> you will definitely find the appropriate link to download.] 3.       Run opengl95.exe file and it will be extracted and will be generated some files. Copy those files and 4.       Extract the file “glutdlls.zip” and it will also generate some more files. 5.       Now, combine all extracted files from two sources (opengl95.exe and glutdlls.zip) and place in one location. Setting up OpenGL environment for Microsoft Visual C++ With any system, you can start with a C\C++ compiler and install ...
Post a Comment
Read more