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Memory Management under UNIXLocate this document in the navigation structure

Use

The memory management system is automatically activated and configured using your entries during the installation or the upgrade.

Prerequisites

Before you install or upgrade the SAP system, ensure that the host system(s) on which the SAP application server is set up fulfill all the requirements, particularly regarding main memory and swap space.

For more information see the Implementation Guide (http://service.sap.com/instguidesInformation published on SAP site) under Hardware and Software Requirements, and in section Swap Space Requirements.

Integration
Activities

Configuring the Memory Management System

The memory management system is preconfigured in the course of the installation/upgrade procedure. The installation/upgrade program requires information about the host system and sets the memory management parameters for each procedure either to the default values or to the values corresponding to the input. This preconfiguration is valid for the host system on which you perform the installation, and for the server you set up during the installation.

Also see the section Configuration for UNIX.

Checking the Operation of the Memory Management System and Setting Parameters

For more information, see the following section of documentation:

Monitoring the Memory Management System

Profile Parameters of Memory Management

More Information

The table below summarizes important SAP notes on memory management.

Note Number

Description

Operating system

546361 Information published on SAP site

FAQ: Memory problems on NT / Windows 2000

Windows

146289 Information published on SAP site

Recommended Parameters for 64 Bit SAP Kernel

All

386605 Information published on SAP site

SAP Memory Management for Linux (32 Bit)

Linux

941735 Information published on SAP site

SAP Memory Management for 64 Bit Linux Systems

Linux

172747 Information published on SAP site

HP-UX Operating System Kernel Parameters

HP-UX

789477 Information published on SAP site

Large extended memory on AIX (64-Bit) as of Kernel 6.20

AIX

174882 Information published on SAP site

Shared memory segment shortage in AIX

AIX

425207 Information published on SAP site

SAP Memory Management, Current Parameter Ranges

All

807929 Information published on SAP site

Memory Protection and Performance

All

117907 Information published on SAP site

Display of SAP Memory Usage in SM04 and ST02

All

127871 Information published on SAP site

Apparent differences in memory consumption display

All

110172 Information published on SAP site

Windows: transactions with high memory requirement

Windows

0146528 Information published on SAP site

Configuration of R/3 on hosts with a large amount of RAM

UNIX