Oracle is a very popular relational database management system that is widely used in enterprises. For first-time users of Oracle, installation and configuration is one of the processes that must be mastered. During the installation of Oracle, the size of physical memory directly affects the performance and reliability of the database. Therefore, in order to ensure the stable operation of Oracle services, you must understand how to configure physical memory.
1. How to check physical memory?
Before installing Oracle, you need to check how much physical memory your system has. In the operating system, you can check the physical memory through the following command:
$ free -m
or
$ cat /proc/meminfo
Both of the above two methods can obtain the physical memory information of the system. Among them, the free -m
command will display a summary of memory usage, as shown below:
total used free shared buffers cached Mem: 7983 3697 4285 0 60 1766 -/+ buffers/cache: 1870 6113 Swap: 7993 0 7993
In the above information, total
represents the size of physical memory in units of Megabyte (MB).
2. The physical memory size required by Oracle services
Before installing Oracle, you need to understand the physical memory size required by different versions of Oracle services. The following is the physical memory size required for Oracle 11g releases:
- Oracle Standard Edition One and Standard Edition: 1GB
- Oracle Standard Edition Two: 2GB
- Oracle Enterprise Edition :2GB
For 64-bit operating systems, the Oracle service requires an additional 500MB of physical memory.
In addition, when choosing the installation type, you also need to consider the size of physical memory. If you choose the typical installation mode, the required physical memory size will be larger. Therefore, before installing Oracle, the physical memory of the system needs to be evaluated.
3. How to configure physical memory?
After evaluating the system's physical memory and Oracle service needs, the next step is to configure the physical memory. First, you need to ensure that the size of the swap partition (swap) in the system is large enough. Oracle's installation program automatically checks and sets the appropriate swap partition size. Generally speaking, the size of the swap partition should be twice the physical memory.
After the swap partition size has been set, you need to allocate appropriate physical memory for the Oracle service. For 32-bit operating systems, the maximum limit of user space is 4GB, so the physical memory size of the Oracle service cannot exceed 4GB. However, in actual operation, some space needs to be reserved for the operating system and other applications. Therefore, the physical memory size of the Oracle service can be set between 1.5GB and 2GB.
For 64-bit operating systems, Oracle services can use more physical memory. However, you also need to reserve some space for the operating system and other applications. Therefore, the physical memory size of the Oracle service can be set between 3GB and 4GB.
4. The impact of physical memory size
The size of physical memory will affect the performance and reliability of Oracle. If the system's physical memory is too small, the performance of Oracle services will be severely affected. At this time, Oracle may issue an out-of-memory error message, causing the service to become unavailable. Therefore, when installing Oracle, you need to ensure that the physical memory of the system is large enough to ensure the normal operation of Oracle services.
When installing Oracle services, the size of physical memory is a very important parameter. If you accidentally set the wrong physical memory size, it may cause unstable performance of the entire system. Therefore, before installation, it is necessary to evaluate the physical memory of the system and set the physical memory size according to actual needs to ensure the best performance and reliability of Oracle services.
The above is the detailed content of How to configure physical memory in oracle. For more information, please follow other related articles on the PHP Chinese website!

Oracle has a profound impact in the fields of data management and enterprise applications. Its database is known for its reliability, scalability and security, and is widely used in industries such as finance, medical care and government. Oracle's influence has also expanded to middleware and cloud computing fields such as WebLogicServer and OracleCloudInfrastructure (OCI), providing innovative solutions. Despite the competition in the open source database and cloud computing market, Oracle maintains its leading position through continuous innovation.

Oracle's mission is to "help people see the value of data", and its core values include: 1) Customer first, 2) Integrity, 3) Innovation, and 4) Teamwork. These values guide Oracle's strategic decision-making and business innovation in the market.

Oracle Database is a relational database management system that supports SQL and object relational models to provide data security and high availability. 1. The core functions of Oracle database include data storage, retrieval, security and backup and recovery. 2. Its working principle involves multi-layer storage structure, MVCC mechanism and optimizer. 3. Basic usages include creating tables, inserting and querying data; advanced usages involve stored procedures and triggers. 4. Performance optimization strategies include the use of indexes, optimized SQL statements and memory management.

In addition to database management, Oracle software is also used in JavaEE applications, data grids and high-performance computing. 1. OracleWebLogicServer is used to deploy and manage JavaEE applications. 2. OracleCoherence provides high-performance data storage and caching services. 3. OracleExadata is used for high performance computing. These tools allow Oracle to play a more diversified role in the enterprise IT architecture.

Oracle is not only a database company, but also a leader in cloud computing and ERP systems. 1. Oracle provides comprehensive solutions from database to cloud services and ERP systems. 2. OracleCloud challenges AWS and Azure, providing IaaS, PaaS and SaaS services. 3. Oracle's ERP systems such as E-BusinessSuite and FusionApplications help enterprises optimize operations.

Oracle software applications in the real world include e-commerce platforms and manufacturing. 1) On e-commerce platforms, OracleDatabase is used to store and query user information. 2) In manufacturing, OracleE-BusinessSuite is used to optimize inventory and production planning.

The reason why Oracle software shines in multiple fields is its powerful application and customized solutions. 1) Oracle provides comprehensive solutions from database management to ERP, CRM, SCM, 2) its solutions can be customized according to industry characteristics such as finance, medical care, manufacturing, etc. 3) Successful cases include Citibank, Mayo Clinic and Toyota, 4) The advantages lie in comprehensiveness, customization and scalability, but challenges include complexity, cost and integration issues.

Choosing MySQL or Oracle depends on project requirements: 1. MySQL is suitable for small and medium-sized applications and Internet projects because of its open source, free and ease of use; 2. Oracle is suitable for core business systems of large enterprises because of its powerful, stable and advanced functions, but at a high cost.


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

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function
