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所在平台: Udemy |
课程主页: https://www.udemy.com/course/sap-application-memory-management/
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课程名称：S4HANA系统中的内存管理及面试问题 课程概述：SAP内存管理是一种内存管理系统，旨在优化ABAP系统中的内存使用，从而确保系统的高性能。用户登录到ABAP系统的应用服务器实例时，便会打开一个用户会话。用户在会话内向应用服务器ABAP发送请求，随之启动的ABAP程序由多个工作进程执行。每个用户会话会分配一个独立的内存区域。 在用户会话（内部会话）中运行ABAP程序时，工作进程会分配包含用户数据（用户上下文）和程序数据的内存。根据数据类型，内存会被分配到不同的内存区域。SAP内存管理负责决定何时以及以何种顺序分配特定的内存区域，分配顺序取决于工作进程的类型（对话或非对话）和基础操作系统。 工作进程：应用服务器ABAP（AS ABAP）处理来自多个前端的请求。每个AS实例都有一个调度器，将收集到的请求转发给相关的工作进程进行处理。工作进程随后执行请求（ABAP程序）。用户可以决定在ABAP系统中可以运行多少种类的工作进程。 SAP内存管理区分以下工作进程类型： - 对话工作进程 - 非对话工作进程（后台、更新、打印） 本课程将深入探讨SAP内存管理的功能及其在ABAP系统中的应用，同时提供与内存管理相关的面试问题，帮助学习者更好地准备职业发展和技术评估。
SAP Memory Management is a memory management system that enables optimal use of the memory in your ABAP system and therefore ensures high performance.Functions of SAP Memory ManagementWhen a user logs on to an application server instance (AS instance) in the ABAP system, a user session is opened. Within a session, the user sends a request to Application Server ABAP (AS ABAP). An ABAP program is started that is executed by multiple work processes. A separate memory area is assigned to each user session.To run an ABAP program within a user session (internal session), the work process allocates memory, which contains user data (user context), as well as program data. Depending on the type of data, it is located in different memory areas. SAP Memory Management decides when and in what order a work process allocates specific memory areas. The order of memory allocation depends on the work process type (dialog or non-dialog) and on the underlying operating system.Work ProcessesAn Application Server ABAP (AS ABAP) processes requests from many front ends. Each AS instance has a dispatcher, which forwards the collected requests to the relevant work processes for processing. The work processes then execute the requests (ABAP programs).NoteYou can decide how many work processes of the different types can run in your ABAP system.SAP Memory Management differentiates between the following work process types:Dialog work processesNon-dialog work processes (background, update, spool)
