32-bit system loaded with more than 4G of memory

Source: Internet
Author: User

1. The maximum addressable space on a 32-bit platform is 4GB, and if you want to use more than 4GB of memory, you must use the Intel PAE (Physical Address Extension) mode, PAE on the Windows NT platform requires only/PAE to boot. ini, and for RHEL5, The default installation mode is not allowed to detect more than 4GB of memory, so you need to install the Kenel-pae suite after the kernel is installed.

The hardware of the 2.x86 platform supports the Level two page table, and Intel Perium Pro supports both PAE and three-level page tables, allowing maximum system addressing to 36 bits, which is within 64GB. But the system process is always running with a virtual address, and on a 32-bit machine, a process can never access more than 4G of bytes. Kenel can only be pieced together to calculate a memory address greater than 4G.

In the Linux Kenel configuration item has high memmory support, if the memory is less than or equal to 1G select "Off", greater than 4g, select "64G"

32-bit system loaded with more than 4G of memory

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.