oracle database architecture pdf

instance opens the same database (which is implemented by the disk sharing technology) and needs to synchronize high-speed cache between these instances to ensure that multiple instances are completely consistent, they do not conflict with each other or even overwrite each other. The database instance name (instance_name) is used for external connections. To contact the

Architecture-related Optimization issues: The database is very large, the traffic is very high, the sharing pool is very small: so the shared pool can not store a lot of parsed SQL statements, resulting in a lot of hard parsing, so the database is very slow. This time to increase the sharing pool. If it is managed automatically, increase the size of the

This article has looked for an Oracle architecture diagram from the Internet for an overall description of Oracle 's Architecture 1oracle database mainly has data files Database instance composition. Users are linked to ser

What is the Oracle character set? How to view the database character set? Explains how to modify the character set of oracle.1. What is the Oracle character set? The Oracle character set is a collection of symbols for the interpretation of byte data. It can be divided into d

This paper is compiled from Oracle documentation Warehouse Builder 11g Architecture and components Oracle Warehouse Builder is an information integration tool that can transform data into high-quality information using an Oracle database. The

Tags: record red access shared pool includes global LOB data dictionary fromOracle Management: InstanceInstance RAC (real application cluster) Oracle working environment, one-to-manyInstance1 Instance2\ /Database SGA buffer shared pool share pools are used to cache execution plans for recently executed SQL statementsMain include: Library cache (Shared SQL zone) and data dictionary cache (

operating environment of Rman consists of several components:650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M01/70/97/wKioL1W52ebRnSAwAAB3xlvy-ZA465.gif "title=" RMAN Env.gif "alt=" Wkiol1w52ebrnsawaab3xlvy-za465.gif "/>1. Rman ClientA client program that performs Rman backup and recovery operations.2. Target DatabaseDatabases that you want to back up or restore.3. ChannelEach channel represents the data flow from the Oracle server process th

I. ORACLE Physical Architecture Principle Structure diagram Each part explains:PGA: Private memory area for use by the current initiating user only.Three effects The session information after the user logs in will be saved in the PGA. run the sort . Assuming there is not enough memory, Oracle will finish in the temporary tablespace

Before we formally begin to learn about Oracle architecture, let's start with a picture of the Oracle architecture with a preliminary grasp.650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M01/54/90/wKiom1SGfyHDTY-EAADqKkAddQM749.jpg "title=" Oracle overall diagram. jp

/orcl/orcl2/trace/orcl2_ora_15431.trc 2 Active problem Count 0 2 Active Incident Count 0 11 rows have been selected. Cdump: This directory contains core dumpsTrace: This directory dumps database alarm logs and trace files for foreground and background database processes.Alert: This directory stores XML alarm logs.HM: This directory stores health check output files.Incident: This directory stores t

The highly available architecture of the database is a relatively unfamiliar area for those of us who are developers of the application side, is built on the basis of a specific database product environment, need to be like DBA so the database products have enough knowledge to be involved, although not in depth, but ca

server architecture (that is, Oracle real-time application clusters), the database name and instance name are a one-to-numerous relationship. The database name and instance name together determine a single database in which multiple instances can be run without affecting ea

see how many places to change.1. Database2, Pojo3. DAO configuration file4. InterfaceYou may also want to modify the action and other places. And the configuration file is very easy to appear bug ...Anyway, I've had enough of this kind of day.Two-tier streamlined architectureLater into Hunan than the United technology after the company framework inspired by the transformation of a 2-tier architecture that uses SPRINGMVC and

Tags: reading notes Oracle DatabaseI. Oracle logical architecture DiagramIi. Composition of logical structureThe logical structure of the ORALCE includes1. Table Space2. Paragraph3. District4, BlockThe Oracle database consists of several table spaces, consisting of several s

choices for enterprises. Yu sicheng, vice president of Oracle and general manager of technology in Greater China Oracle Database 12c adopts a multi-tenant architecture. By separately managing data content in different tenants, the independence and security required between tenants can be ensured. While retaining the

Tags: instruction class update variable content private Area LOB permissionsPga-program Global AreaThe PGA memory area is private and not shared, and any operations initiated by the user against the database, whether queries or updates, are preprocessed in the region before entering the instance area (which is done by the SGA and the system daemon process).What are the main pretreatment?First, save the user's connection information, such as session pr

Label:The Oracle EBS R12 server-side file structure is as follows:The top level directory is divided into1) inst--– configuration information and other information related to the entire EBS instance (instance)2) DB ——-Primary storage DB layer Information3) Apps ——-primarily application-level information1) First look at the situation of Inst_top2) Look at the contents of the database again3) Finally the cont

Label:The database high-availability architecture is a relatively unfamiliar area for those of us who develop these applications, and it is an environment built on specific database products that requires sufficient knowledge of database products like DBAs to be involved, though not in depth, but can be learned through

Tags: standby oracle change recordDataguard provides two different ways to apply logs to the standby database: Redo apply (physical standby), SQL apply (logical standby).The main goal of DG is to protect database data from loss. Another goal is to provide a high degree of isolation between master and slave libraries.Physical Standby:Redo apply uses the method of

Engine implementation MySQL Two transactional storage engine: InnoDB, NDB Cluster Automatic submission of autocommit; The default is Autocommit mode, and if you do not explicitly start a transaction, each query is committed as a transaction, and you can enable =1 =on by using the autocommit variable, disable =0 =off (all queries are in one transaction until explicit commit Rollback) Start a new transaction at the end of the transaction and modify the variable to have no effect on the non-transa