https://techdifferences.com/difference-between-paging-and-segmentation-in-os.html how does paging solve the problem of external fragments? https://www.quora.com/How-external-fragmentation-is-possible-in-memory-management-using-Segmentation-scheme-in-…

COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION An SMP operating system manages processor and other computer resources so that the user perceives a single operating system controlling system resources. In fact, such a c…

The segmentation and paging mechanisms provide in the support a wide variety of approaches to memorymanagement. When segmentation and paging are combined, segments can be mapped to pages in several ways.To implement a flat (unsegmented) addressing en…

innodb 引擎 一.概述 InnoDB 是一个用的比较广泛的存储引擎,因为它支持事物和外键,还有不错的效率;我们先看看官方教程怎么说; 我们先读一下, 对于上面的文档, 对一个InnoDB的表首先它在磁盘上的呈现形式是一个 .frm 文件和一个 表空间文件, 对于InnoDB的表它的数据和索引是存放在表空间里面的.InnoDB的表空间是一个逻辑的单存储区域,这个区域由一个或多个文件组成,它的大小决定于文件系统的限制,我们可以把它放在不同的分区上,他还可以存放在裸分区上,突破文件系统的限制,提…

/**********************************************************************//** Looks for an unused segment inode on a segment inode page. @return segment inode index, or ULINT_UNDEFINED if not found */ static ulint fsp_seg_inode_page_find_free( /*======…

#define FSEG_ARR_OFFSET (FSEG_PAGE_DATA + FLST_NODE_SIZE) #define FSEG_PAGE_DATA FIL_PAGE_DATA #define FIL_PAGE_DATA 38 #define FLST_NODE_SIZE (2 * FIL_ADDR_SIZE) #define FIL_ADDR_SIZE 6 #define FSEG_INODE_SIZE \ (16 + 3 * FLST_BASE_NODE_SIZE \ + FSE…

Assembling a detailed and accurate history of the 80386, including a complete listing of all the "steppings" (revisions), when they were released, what "errata" (problems) each stepping suffered from, and which of those problems were f…

原文链接:https://openmaniak.com/iperf.php Iperf is a tool to measure the bandwidth and the quality of a network link. Jperf can be associated with Iperf to provide a graphical frontend written in Java. The network link is delimited by two hosts running I…

LINUX 和 WINDOWS 内核的区别 [声明:欢迎转载,转载请注明出自CU ACCESSORY http://linux.chinaunix.net/bbs/thread-1153868-1-1.html] 关于LINUX和WINDOWS的口水站已经很多了.本文企图从技术角度来比较下2个主流操作系统的异同.偏重于内核部分. 一.动机: 我最早是 WINDOWS 阵营的.在WINDOWS下写过2年多的驱动程序.后来由于学习需要,转投LINUX,一晃也快2年了.期间经历了很多曲折,也学到了很多…

一.前言 MySQL 提供的非常丰富的存储引擎种类供大家选择,有多种选择固然是好事,但是需要我们理解掌握的知识也会增加很多.本章将介绍最为常用的两种存储引擎进行针对性的优化建议. 二.MyISAM存储引擎优化 我们知道,MyISAM存储引擎是MySQL最为古老的存储引擎之一,也是最为流行的存储引擎之一.对于以读请求为主的非事务系统来说,MyISAM存储引擎由于其优异的性能表现及便利的维护管理方式无疑是大家最优先考虑的对象.这一节我们将通过分析MyISAM存储引擎的相关特性,来寻找提高MyISAM…