Oracle 参数文件介绍
Oracle数据库启动以后，通过select * from v$parameter这个语句可以查看到Oracle数据库使用的所有参数。对于Oracle的参数文件，分
Oracle数据库启动以后，通过select * from v$parameter这个语句可以查看到Oracle数据库使用的所有参数。
对于Oracle的参数文件，分为spfile 二进制文件和pfile 文本文件，现在的数据库一般都是使用spfile二进制文件作为启动Oracle的参数文件。对于spfile和pfile之间的区别：
1 spfile是二进制文件（可以通过 string spfileorcl.ora进行二进制的文件查看），不可以使用文本编辑器修改，只能在sqlplus中使用命令动态修改参数。对于pfile是文本文件，可以直接使用文本编辑器进行修改，，重启数据库后生效
2 spfile必须存储在服务端，一般是在$Oracle_HOME/dbs目录下面，对于pfile则是可以存储在客户端，可以通过客户端的pfile启动数据库
3 spfile 和pfile之间可以动态转化 在sql命令下（不管是否已近启动数据库实例）
通过pfile创建spfile create pfile=’/u01/app/Oracle/dbs/spfileorcl.ora’ from pfile=’/u01/app/Oracle/dbs/initorcl.ora’(或者使用 create spfile from pfile)
4 如果启动数据库start 不指定参数文件（如果sid是orcl），则会在$Oracle_HOME/dbs 目录下依次寻找参数文件 spfileorcl.ora>initorcl.ora
5 我们可以指定参数文件来启动数据库(这里只能通过pfile文件，不能是spfile文件)
startup pfile='/u01/app/Oracle/dbs/init.ora'（使用pfile文件）
6 对于参数文件中没有指定的参数，均是采取相关参数的默认值
Oracle 表的创建 及相关参数
从参数取值看Oracle OMF特性
Oracle 10g的隐含参数_complex_view_merging引发的性能问题
Oracle 11g RAC 中几个重要参数的解释
Oracle开启归档模式及其相关参数
本文永久更新链接地址：
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
Detailed tutorial on establishing a database connection using MySQLi in PHP
Jun 04, 2024 pm 01:42 PM
How to use MySQLi to establish a database connection in PHP: Include MySQLi extension (require_once) Create connection function (functionconnect_to_db) Call connection function ($conn=connect_to_db()) Execute query ($result=$conn->query()) Close connection ( $conn->close())
iOS 18 adds a new 'Recovered' album function to retrieve lost or damaged photos
Jul 18, 2024 am 05:48 AM
Apple's latest releases of iOS18, iPadOS18 and macOS Sequoia systems have added an important feature to the Photos application, designed to help users easily recover photos and videos lost or damaged due to various reasons. The new feature introduces an album called "Recovered" in the Tools section of the Photos app that will automatically appear when a user has pictures or videos on their device that are not part of their photo library. The emergence of the "Recovered" album provides a solution for photos and videos lost due to database corruption, the camera application not saving to the photo library correctly, or a third-party application managing the photo library. Users only need a few simple steps
How does Go WebSocket integrate with databases?
Jun 05, 2024 pm 03:18 PM
How to integrate GoWebSocket with a database: Set up a database connection: Use the database/sql package to connect to the database. Store WebSocket messages to the database: Use the INSERT statement to insert the message into the database. Retrieve WebSocket messages from the database: Use the SELECT statement to retrieve messages from the database.
How to handle database connection errors in PHP
Jun 05, 2024 pm 02:16 PM
To handle database connection errors in PHP, you can use the following steps: Use mysqli_connect_errno() to obtain the error code. Use mysqli_connect_error() to get the error message. By capturing and logging these error messages, database connection issues can be easily identified and resolved, ensuring the smooth running of your application.
How to use database callback functions in Golang?
Jun 03, 2024 pm 02:20 PM
Using the database callback function in Golang can achieve: executing custom code after the specified database operation is completed. Add custom behavior through separate functions without writing additional code. Callback functions are available for insert, update, delete, and query operations. You must use the sql.Exec, sql.QueryRow, or sql.Query function to use the callback function.
How to handle database connections and operations using C++?
Jun 01, 2024 pm 07:24 PM
Use the DataAccessObjects (DAO) library in C++ to connect and operate the database, including establishing database connections, executing SQL queries, inserting new records and updating existing records. The specific steps are: 1. Include necessary library statements; 2. Open the database file; 3. Create a Recordset object to execute SQL queries or manipulate data; 4. Traverse the results or update records according to specific needs.
Top 10 global digital currency trading apps recommended (2025 currency trading software ranking)
Mar 12, 2025 pm 05:48 PM
This article recommends the top ten digital currency trading apps in the world, including Binance, OKX, Huobi Global, Coinbase, Kraken, Gate.io, KuCoin, Bitfinex, Gemini and Bitstamp. These platforms have their own characteristics in terms of transaction pair quantity, transaction speed, security, compliance, user experience, etc. For example, Binance is known for its high transaction speed and extensive services, while Coinbase is more suitable for novices. Choosing a platform that suits you requires comprehensive consideration of your own needs and risk tolerance. Learn about the world's mainstream digital currency trading platforms to help you conduct digital asset trading safely and efficiently.
How to install and register the btc trading app?
Feb 21, 2025 pm 07:09 PM
This article will provide a detailed introduction to how to install and register a Bitcoin trading application. The Bitcoin trading app allows users to manage and trade cryptocurrencies such as Bitcoin. The article guides users through the installation and registration process step by step, including downloading applications, creating accounts, performing identity verification, and first deposit. The goal of the article is to provide beginners with clear and easy-to-understand guidelines to help them easily enter the world of Bitcoin trading.
