Oracle

Oracle's memory configuration is closely related to Oracle performance. Configuration of memory is the configuration that most affects Oracle performance. Memory also directly affects the consumption of two other important resources: CPU and IO.

I would like to use the following two examples to make it easier to understand the difference between current pattern reading and consistent reading. Let me start with the following 2 examples of our discussion. CASE1: Hellodba.com>set time on 10

The Oracle Optimizer evaluates expressions whenever possible and converts a particular syntax structure to an equivalent structure, and this is because: • Either the resulting expression can have a faster speed than the source expression. • Either

After installing Oracle on the Linux,unix operating system, use the Sqlplus '/as sysdba ' command to log in to the Oracle database as SYSDBA, which has some security implications, The operating system administrator can also log Oracle users to the

Summary: Describes the characteristics and structure of the ADF and describes the process of developing the Java EE application using the ADF. Keywords: ADF ORACLE java EE MVC Introduction to the ADF The ADF (Application Development framework) is

Summary: This article begins with a detailed introduction to the concept of shared pool in Oracle and the memory structure included. It then provides an in-depth overview of Oracle's management mechanisms for shared pool. Finally, the paper

Non-Data guard patch installation tutorials refer to the [Oracle] cpu/psu patch installation tutorial, where Data Guard requires primary and standby to be patched at the same time, so the steps are more complex and the main steps are as follows:

An external table implementation process based on Oracle_datapump: First, create external tables and generate DMP files 1, create directory, you need to have create any directory permissions: CREATE DIRECTORY admin as '/oracle/admin '; 2, create

Use ORADBI to read multiple files stored in a BLOB field and restore to a specified path. Here's the complete code: // //READ_BLOBFILE.C-Read the blobfile example //cheungmine@gmail.com////Memory leak detection //Place the statement where needed

The use of bbed requires attention: 1, win under Oracle does not provide 2, with Oracle software release 3, Unix/linux under the use of the need for prior relink 4, Oracle initially used bbed to repair bad block, starting from 9i can be

In most cases, modifications to the primary database will be propagated to the physical standby database and applied without the need for additional operations on the physical standby side, except that, depending on the actual configuration, some

--Data table space capacity usage SELECT a.tablespace_name as "table space name", To_char (b.total/1024/1024,999999.99) | | M ' as ' total capacity ', To_char ((b.total-a.free)/1024/1024, ' 9999990d99 ') | | M ' as ' used capacity ', To_char

Oracle provides ref CURSOR, which enables the ability to pass result sets between programs, and can also implement bulk SQL using ref CURSOR to improve SQL performance. Use the Scott User's EMP table to implement the following test cases: Sql>

One, what is the Oracle character set An Oracle character set is a collection of symbols that are interpreted as a byte of data, having a size and a mutual containment relationship. ORACLE's support for the national language architecture allows you

This article describes 8 commonly used monitoring data shell scripts. First, we reviewed some of the UNIX commands commonly used by DBAs, and explained how to execute the DBA script regularly with Unix cron. Online also has good Many similar

As a user of an Oracle database, the export and import two commands are never unfamiliar, as they are the tools we often use for data backup and recovery. However, the Oracle character set problems that occur during the use of these two commands

A script to start and set up a trace example we can use script to trace stored procedures, of course, to understand the specific syntax of these stored procedures and parameters of the meaning of these syntax and parameter meaning please check

Oracle 10g R2 supports manually moving databases across platforms, even if these platforms have different mantissa formats (endian format). The mantissa format is related to byte ordering, which has two different formats, the large mantissa and the

Incomplete recovery is incomplete data recovery, incomplete recovery is the same in many ways as full recovery, they have the same basic set of commands, but some other commands are added without full recovery. There are many reasons for incomplete

Some time ago in a migration of data pump and exp, found that the difference in efficiency is quite large. Here is an example of a simple comparison. This article discusses the effect of parallelism on the export of data pumps. Write a few