在Oracle db 11gR2版本中启用 Oracle NUMA 支持
在Oracle db 11gR2版本中启用 Oracle NUMA 支持
参考原文：
Enable Oracle NUMA support with Oracle Server Version 11gR2 (文档 ID 864633.1)
适用于：
Oracle Database - Enterprise Edition - Version 11.2.0.1 and later
Oracle Database - Standard Edition - Version 11.2.0.1 and later
Information in this document applies to any platform.
Oracle on NUMA capable hardware
***Checked for relevance on 11-Mar-2013***
细节：
Oracle NUMA（Non Uniform Memory Architecture）support can be used with large SMP multiprocessor environments with NUMA hardware。
启用Oracle NUMA support 会有效的使用底层的NUMA硬件，并且可能提升db 性能。
Oracle NUMA support 需要 硬件，os，和 oracle db version 的正确组合。
从oracle db 11.2.0.1开始，默认Oracle NUMA support是被禁用的。
本文描述了Oracle db 11gR2情况下，Oracle NUMA support 的启用方法
Oracle db 11.2之前版本 的环境中，使用NUMA的建议和对NUMA的支持，请见mos文章：Note:759565.1
请小心启用 NUMA支持。请联系你的硬件供应商以获取你的硬件和操作系统有关NUMA兼容性的信息。
推荐：
Customers who have tuned their Database specifically for NUMA can continue to run with NUMA enabled with Oracle Server Version 11.2.0.1.
It is strongly recommended to customers who want to enable NUMA do sufficient testing before going into production.
行动：
oracle db 11.2中启用NUMA的步骤：
在一个NUMA兼容的环境中使用 oracle db 11.2时，默认Oracle 将不会检测硬件和os 的NUMA兼容性，也不会启用Oracle NUMA support
设置如下的隐含参数以启用NUMA support
_enable_NUMA_support=TRUE
除此之外，不需要其他的步骤。
_enable_NUMA_support 这个参数取代了 _enable_NUMA_optimization 这个参数。若是使用 _enable_NUMA_optimization参数来代替_enable_NUMA_support参数，在alert log中会有报警：
..._enable_NUMA_optimization is deprecated please use _enable_NUMA_support instead....
一旦在参数文件中设置了_enable_NUMA_support参数，并且oracle db 11.2 运行在NUMA兼容的环境中，那么数据库实例的alert日志将会有 NUMA support 已经被启用的反馈，并能显示何种NUMA配置被检测到。
举例，在a 8 NUMA domains Linux system with 48 cores:
...NUMA system found and support enabled (8 domains - 6,6,6,6,6,6,6,6)...
警告：
禁用或者启用会改变应用程序的性能
在生产环境启用NUMA support之前，，建议在测试环境中进行评估
当Oracle NUMA support被禁用时，操作系统和 硬件配置可能需要调整或者重新配置，请咨询你的硬件供应商以获取更多的信息
Oracle 11g 在RedHat Linux 5.8_x64平台的安装手册
Linux-6-64下安装Oracle 12C笔记
在CentOS 6.4下安装Oracle 11gR2(x64)
Oracle 11gR2 在VMWare虚拟机中安装步骤
Debian 下 安装 Oracle 11g XE R2
本文永久更新链接地址：
Explain the InnoDB Buffer Pool and its importance for performance.Apr 19, 2025 am 12:24 AMInnoDBBufferPool reduces disk I/O by caching data and indexing pages, improving database performance. Its working principle includes: 1. Data reading: Read data from BufferPool; 2. Data writing: After modifying the data, write to BufferPool and refresh it to disk regularly; 3. Cache management: Use the LRU algorithm to manage cache pages; 4. Reading mechanism: Load adjacent data pages in advance. By sizing the BufferPool and using multiple instances, database performance can be optimized.
MySQL vs. Other Programming Languages: A ComparisonApr 19, 2025 am 12:22 AMCompared with other programming languages, MySQL is mainly used to store and manage data, while other languages such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages have advantages in their respective fields such as data analytics, enterprise applications, and system programming.
Learning MySQL: A Step-by-Step Guide for New UsersApr 19, 2025 am 12:19 AMMySQL is worth learning because it is a powerful open source database management system suitable for data storage, management and analysis. 1) MySQL is a relational database that uses SQL to operate data and is suitable for structured data management. 2) The SQL language is the key to interacting with MySQL and supports CRUD operations. 3) The working principle of MySQL includes client/server architecture, storage engine and query optimizer. 4) Basic usage includes creating databases and tables, and advanced usage involves joining tables using JOIN. 5) Common errors include syntax errors and permission issues, and debugging skills include checking syntax and using EXPLAIN commands. 6) Performance optimization involves the use of indexes, optimization of SQL statements and regular maintenance of databases.
MySQL: Essential Skills for Beginners to MasterApr 18, 2025 am 12:24 AMMySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.
MySQL: Structured Data and Relational DatabasesApr 18, 2025 am 12:22 AMMySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.
MySQL: Key Features and Capabilities ExplainedApr 18, 2025 am 12:17 AMMySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.
The Purpose of SQL: Interacting with MySQL DatabasesApr 18, 2025 am 12:12 AMSQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.
MySQL for Beginners: Getting Started with Database ManagementApr 18, 2025 am 12:10 AMThe basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA
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
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
SublimeText3 Linux new version
SublimeText3 Linux latest version
Dreamweaver Mac version
Visual web development tools
ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment
SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
SublimeText3 Mac version
God-level code editing software (SublimeText3)
