Oracle Linux: HugePages What It Is... and What It Is Not... (Doc ID 361323.1)

Last updated on OCTOBER 11, 2022

Applies to:

Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Cloud Schema Service - Version N/A and later
Linux x86
Linux on IBM Z
IBM S/390 Based Linux (31-bit)
IBM: Linux on POWER Big Endian Systems
Linux x86-64
Linux Itanium

Purpose

This document describes the HugePages feature in the Linux kernel available for 32-bit and 64-bit architectures. There has been some confusion among the terms and uses related to HugePages. This document should clarify the misconceptions about the feature.

Scope

Information in this document is useful for Linux system administrators and Oracle database administrators working with system administrators.

This document covers information about HugePages concept that applies to very large memory (VLM) (>= 4GB) systems for 32-bit and 64-bit architectures including some configuration information and references.