papering - 博客园

2016年12月24日

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION To understand the structure of the linear address, you need to know tha 阅读全文

posted @ 2016-12-24 23:23 papering 阅读(244) 评论(0) 推荐(0)

学习之道-从求和起-求和曲线面积瞬时速率极限微积分---求和由高解低已知到未知高阶到低阶连续自然数的K次方之和

摘要：数学分析张筑生阅读全文

posted @ 2016-12-24 23:18 papering 阅读(290) 评论(0) 推荐(0)

p::first-line { text-transform: uppercase }

摘要： https://www.w3.org/TR/css3-selectors/ Note that the length of the first line depends on a number of factors, including the width of the page, the font 阅读全文

posted @ 2016-12-24 20:17 papering 阅读(494) 评论(0) 推荐(0)

运行环境配置实践 lnmp node 升级版本安装mysql8.0

摘要：小结： 1） a. [mysqld] 打开/etc/my.cnf配置文件添加skip_grant_tables 一行，然后保存退出 mysql忘记密码如何重置密码，以及修改root密码的三种方法 - 云+社区 - 腾讯云 https://cloud.tencent.com/developer/ar 阅读全文

posted @ 2016-12-24 19:09 papering 阅读(229) 评论(0) 推荐(0)

w win cmd VS broswer

摘要： php -f Fetch data from db , use php without any bugs to analyse the data and read and write db, without the render of the broswer php shell VS browser 阅读全文

posted @ 2016-12-24 18:51 papering 阅读(178) 评论(0) 推荐(0)

<?php set_time_limit(10);

摘要： w Fatal error: Maximum execution time of 10 seconds exceeded in ...\w_fun.php on line ... http://us2.php.net/manual/en/function.set-time-limit.php boo 阅读全文

posted @ 2016-12-24 17:50 papering 阅读(265) 评论(0) 推荐(0)

Translation Lookaside Buffer

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION In principle, then, every virtual memory reference can cause two physic 阅读全文

posted @ 2016-12-24 11:24 papering 阅读(442) 评论(0) 推荐(0)

Virtual Memory PAGE TABLE STRUCTURE

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION The basic mechanism for reading a word from memory involves the transla 阅读全文

posted @ 2016-12-24 11:00 papering 阅读(592) 评论(0) 推荐(0)

Virtual Memory DEMAND PAGING - The avoidance of thrashing was a major research area in the 1970s and led to a vari- ety of complex but effective algorithms.

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION With the use of paging, truly effective multiprogramming systems came i 阅读全文

posted @ 2016-12-24 09:19 papering 阅读(300) 评论(0) 推荐(0)

Paging

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION Both unequal fixed-size and variable-size partitions are inefficient in 阅读全文

posted @ 2016-12-24 06:05 papering 阅读(208) 评论(0) 推荐(0)

Swapping

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION Referring back to Figure 8.11, we have discussed three types of queues: 阅读全文

posted @ 2016-12-24 05:40 papering 阅读(776) 评论(0) 推荐(0)

Partitioning

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION The simplest scheme for partitioning available memory is to use fixed-s 阅读全文

posted @ 2016-12-24 05:15 papering 阅读(269) 评论(0) 推荐(0)

2016年12月23日

Stationary point

摘要： https://en.wikipedia.org/wiki/Stationary_point https://zh.wikipedia.org/wiki/驻点阅读全文

posted @ 2016-12-23 22:42 papering 阅读(355) 评论(0) 推荐(0)

Memory Allocation in the MySQL Server

摘要： https://dev.mysql.com/doc/internals/en/memory-allocation-mysql-server.html MySQL Internals Manual / Memory Allocation / Memory Allocation in the MySQL 阅读全文

posted @ 2016-12-23 20:02 papering 阅读(275) 评论(0) 推荐(0)

the OS maintains a number of queues

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION To do its job, the OS maintains a number of queues. Each queue is simpl 阅读全文

posted @ 2016-12-23 19:57 papering 阅读(270) 评论(0) 推荐(0)

matches field ID value 17.9.1 The LABEL element

摘要： https://www.w3.org/TR/html401/interact/forms.html#edef-LABEL 阅读全文

posted @ 2016-12-23 18:36 papering 阅读(428) 评论(0) 推荐(0)

corresponding SQLSTATE values general error

摘要： http://dev.mysql.com/doc/refman/5.7/en/error-messages-server.html B.3 Server Error Codes and Messages MySQL programs have access to several types of e 阅读全文

posted @ 2016-12-23 16:01 papering 阅读(328) 评论(0) 推荐(0)

控制变量法-初中物理-Nobel Lecture, December 12, 1929-php执行SET GLOBAL connect_timeout=2效果

摘要： Navicat 'ww' root账户用php、Navicat、\MySQL\bin\mysql.exe 执行阅读全文

posted @ 2016-12-23 15:41 papering 阅读(421) 评论(0) 推荐(0)

Allowed memory size Out of memory ini_set('memory_limit', '-1');

摘要： Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 51 bytes) Fatal error: Out of memory (allocated 1013186560) (tried to 阅读全文

posted @ 2016-12-23 14:45 papering 阅读(272) 评论(0) 推荐(0)

PROCESS STATES

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION To understand the operation of the short-term scheduler, we need to con 阅读全文

posted @ 2016-12-23 13:07 papering 阅读(302) 评论(0) 推荐(0)

I O memory 时时考虑

摘要： I O memory 时时考虑阅读全文

posted @ 2016-12-23 12:16 papering 阅读(132) 评论(0) 推荐(0)

IN()

摘要： High Performance My SQL, Third Edition Consider the followingWHERE clause: WHERE eye_color IN('brown','blue','hazel') AND hair_color IN('black','red', 阅读全文

posted @ 2016-12-23 12:14 papering 阅读(286) 评论(0) 推荐(0)

max_allowed_packet

摘要： MySQL :: MySQL 8.0 Reference Manual :: B.3.2.8 Packet Too Large B.3.2.8 Packet Too Large A communication packet is a single SQL statement sent to the 阅读全文

posted @ 2016-12-23 12:10 papering 阅读(176) 评论(0) 推荐(0)

LENGTH() CHAR_LENGTH()

摘要： http://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_length LENGTH(str) Returns the length of the string str, measured in bytes. A mu 阅读全文

posted @ 2016-12-23 12:06 papering 阅读(198) 评论(0) 推荐(0)

Rochester Memory Hardware Error Research Project

摘要： http://www.cs.rochester.edu/research/os/memerror/ 阅读全文

posted @ 2016-12-23 11:18 papering 阅读(171) 评论(0) 推荐(0)

A Realistic Evaluation of Memory Hardware Errors and Software System Susceptibility

摘要： http://www.cs.rochester.edu/~kshen/papers/usenix2010-li.pdf Abstract Memory hardware reliability is an indispensable part of whole-system dependabilit 阅读全文

posted @ 2016-12-23 11:16 papering 阅读(305) 评论(0) 推荐(0)

Calculate its MTBF assuming 2000 FITS for each DRAM

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION A common unit of measure for failure rates of electronic components is 阅读全文

posted @ 2016-12-23 10:06 papering 阅读(1034) 评论(0) 推荐(0)

the computer spends over 96% of its time waiting for I/O devices to finish transferring data

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION 阅读全文

posted @ 2016-12-23 09:01 papering 阅读(152) 评论(0) 推荐(0)

2016年12月22日

bat_action

摘要：实践： 1、将 xcopy /y /d "..\bizDdl\*dll" . 当前目前的父目录下的bizDdl目录中的全部dll后缀文件复制到当前目录注释： :: rmdir /s/q website 重命名 ren 旧名称新名称 xcopy /y /d configGITignore.ini 阅读全文

posted @ 2016-12-22 19:24 papering 阅读(324) 评论(0) 推荐(0)

Diode

摘要： Diode https://zh.wikipedia.org/wiki/真空管抽真空电子在于其放射过程中，因会与空气中之组成分子相撞而产生阻力，因此电子经由如空气之类的介质来移动的话，将会比在真空状态来的困难，所以若想轻松的达成电子放射之移动过程，需将产生电子放射及电子收集之各项元件，也就是灯丝阅读全文

posted @ 2016-12-22 14:13 papering 阅读(367) 评论(0) 推荐(0)

Nobel Lecture, December 12, 1929 Thermionic phenomena and the laws which govern them

摘要： http://www.nobelprize.org/nobel_prizes/physics/laureates/1928/richardson-lecture.pdf OWEN W. RICHARDSON Thermionic phenomena and the laws which govern 阅读全文

posted @ 2016-12-22 14:01 papering 阅读(301) 评论(0) 推荐(0)

Programming In hardware Programming in software

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION 阅读全文

posted @ 2016-12-22 12:24 papering 阅读(168) 评论(0) 推荐(0)

von Neumann architecture

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION 3.1 COMPUTER COMPONENTS As discussed in Chapter 2, virtually all contem 阅读全文

posted @ 2016-12-22 12:19 papering 阅读(304) 评论(0) 推荐(0)

Syntactic_sugar

摘要： https://en.wikipedia.org/wiki/Syntactic_sugar http://stackoverflow.com/questions/11366006/mysql-on-vs-using http://dev.mysql.com/doc/refman/5.7/en/joi 阅读全文

posted @ 2016-12-22 11:23 papering 阅读(249) 评论(0) 推荐(0)

processor, memory, I/O

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION 3.3 INTERCONNECTION STRUCTURES A computer consists of a set of componen 阅读全文

posted @ 2016-12-22 09:09 papering 阅读(230) 评论(0) 推荐(0)

2016年12月20日

he time that it takes to bring a block from disk into main memory

摘要： DATABASE SYSTEM CONCEPTS, SIXTH EDITION There is a trade-off that the system designer must make between access timeand space overhead. Although the de 阅读全文

posted @ 2016-12-20 19:35 papering 阅读(218) 评论(0) 推荐(0)

How MySQL Uses Indexes CREATE INDEX SELECT COUNT(*)

摘要： MySQL :: MySQL 5.7 Reference Manual :: 9.3.1 How MySQL Uses Indexeshttps://dev.mysql.com/doc/refman/5.7/en/mysql-indexes.html CREATE INDEX SELECT COUN 阅读全文

posted @ 2016-12-20 17:14 papering 阅读(260) 评论(0) 推荐(0)

网络协议图

摘要：科来网络通讯协议图免费下载 - 科来 https://www.colasoft.com.cn/download/protocols_map.php 科来《网络通讯协议图2023版》.pdf https://www.colasoft.com.cn/wp-content/uploads/2023/07/ 阅读全文

posted @ 2016-12-20 15:51 papering 阅读(424) 评论(0) 推荐(0)

UTC ISO 8601

摘要：如果时间在零时区，并恰好与协调世界时相同，那么（不加空格地）在时间最后加一个大写字母Z。Z是相对协调世界时时间0偏移的代号。如下午2点30分5秒表示为14:30:05Z或143005Z；只表示小时和分，为1430Z或14:30Z；只表示小时，则为14Z或14Z。 def ts_to_format_s 阅读全文

posted @ 2016-12-20 13:32 papering 阅读(711) 评论(0) 推荐(0)

but this usually doesn’t gain you anything.

摘要： The following rules describe the possibilities for defining the first TIMESTAMP column in a table with the current timestamp for both the default and 阅读全文

posted @ 2016-12-20 11:21 papering 阅读(276) 评论(0) 推荐(0)