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2016年12月27日

摘要： http://dev.mysql.com/doc/refman/5.7/en/declare-local-variable.html http://dev.mysql.com/doc/refman/5.7/en/set-variable.html SET Syntax for Variable As 阅读全文

posted @ 2016-12-27 18:40 papering 阅读(164) 评论(0) 推荐(0) 编辑

Defining Stored Programs

摘要： ok ok http://dev.mysql.com/doc/refman/5.7/en/stored-programs-defining.html 阅读全文

posted @ 2016-12-27 18:11 papering 阅读(182) 评论(0) 推荐(0) 编辑

Sign-Magnitude Representation

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION There are several alternative conventions used to represent negative as 阅读全文

posted @ 2016-12-27 14:08 papering 阅读(364) 评论(0) 推荐(0) 编辑

the core or essence of a computer

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION The ALU is that part of the computer that actually performs arithmetic 阅读全文

posted @ 2016-12-27 13:23 papering 阅读(168) 评论(0) 推荐(0) 编辑

HEXADECIMAL NOTATION is Syntactic_sugar.

摘要： Syntactic_sugar. 阅读全文

posted @ 2016-12-27 13:20 papering 阅读(121) 评论(0) 推荐(0) 编辑

Converting from Decimal Notation to Binary Notation for Fractions

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION Therefore, the conversion algorithm involves repeated multiplication by 阅读全文

posted @ 2016-12-27 13:17 papering 阅读(170) 评论(0) 推荐(0) 编辑

convert from base 10 to base 2

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION Hence, we convert from base 10 to base 2 by repeated divisions by 2. Th 阅读全文

posted @ 2016-12-27 13:14 papering 阅读(225) 评论(0) 推荐(0) 编辑

MYSQL PASSWORD()

摘要： https://www.pythian.com/blog/hashing-algorithm-in-mysql-password-2/ 阅读全文

posted @ 2016-12-27 12:04 papering 阅读(158) 评论(0) 推荐(0) 编辑

Environment Variables

摘要： https://msdn.microsoft.com/en-us/library/windows/desktop/ms682653(v=vs.85).aspx Every process has an environment block that contains a set of environm 阅读全文

posted @ 2016-12-27 11:59 papering 阅读(219) 评论(0) 推荐(0) 编辑

Why Stored Procedures?

摘要： http://www.w3resource.com/mysql/mysql-procedure.php Stored procedures are fast. MySQL server takes some advantage of caching, just as prepared stateme 阅读全文

posted @ 2016-12-27 10:19 papering 阅读(134) 评论(0) 推荐(0) 编辑

delimiter

摘要： http://www.mysqltutorial.org/getting-started-with-mysql-stored-procedures.aspx The first command is DELIMITER // , which is not related to the stored 阅读全文

posted @ 2016-12-27 09:59 papering 阅读(178) 评论(0) 推荐(0) 编辑

2016年12月26日

page fault rate

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION A program computes the row sums Ci=anj = 1aij of an array A that is 100 阅读全文

posted @ 2016-12-26 22:30 papering 阅读(240) 评论(0) 推荐(0) 编辑

2016年12月25日

Segmentation

摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION There is another way in which addressable memory can be subdivided, kno 阅读全文

posted @ 2016-12-25 15:10 papering 阅读(349) 评论(0) 推荐(0) 编辑

自动记录气压计

摘要：数学分析张筑生阅读全文

posted @ 2016-12-25 09:59 papering 阅读(157) 评论(0) 推荐(0) 编辑

Gradient

摘要： https://en.wikipedia.org/wiki/Gradient 阅读全文

posted @ 2016-12-25 09:28 papering 阅读(165) 评论(0) 推荐(0) 编辑

2016年12月24日

Pentium II paging mechanism

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(204) 评论(0) 推荐(0) 编辑

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(261) 评论(0) 推荐(0) 编辑

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(423) 评论(0) 推荐(0) 编辑

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(182) 评论(0) 推荐(0) 编辑

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(138) 评论(0) 推荐(0) 编辑

<?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(195) 评论(0) 推荐(0) 编辑

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(362) 评论(0) 推荐(0) 编辑

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(490) 评论(0) 推荐(0) 编辑

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(246) 评论(0) 推荐(0) 编辑

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(153) 评论(0) 推荐(0) 编辑

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(704) 评论(0) 推荐(0) 编辑

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(216) 评论(0) 推荐(0) 编辑

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(308) 评论(0) 推荐(0) 编辑

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(241) 评论(0) 推荐(0) 编辑

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(217) 评论(0) 推荐(0) 编辑

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(393) 评论(0) 推荐(0) 编辑

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(270) 评论(0) 推荐(0) 编辑

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(384) 评论(0) 推荐(0) 编辑

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(226) 评论(0) 推荐(0) 编辑

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(241) 评论(0) 推荐(0) 编辑

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(110) 评论(0) 推荐(0) 编辑

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(238) 评论(0) 推荐(0) 编辑

max_allowed_packet

摘要： http://dev.mysql.com/doc/refman/5.7/en/comparison-operators.html#function_in The number of values in the IN list is only limited by the max_allowed_pa 阅读全文

posted @ 2016-12-23 12:10 papering 阅读(146) 评论(0) 推荐(0) 编辑

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(155) 评论(0) 推荐(0) 编辑

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(153) 评论(0) 推荐(0) 编辑