performance management books

Yaconf is a high-performance configuration management extension, and is an extended application under PHP7 released by PHP core developer Bird Xinchen. The main goal is to simplify reading the project configuration file, separating the configuration file from the project code, and enhancing the readability and maintainability of the configuration file. According to yaconf developer Xinchen on his blog, the

2014-09-25 BaoxinjianI. Summary In the Official document "Oracle Performance Tuning Guide", mention connecting to the database was an expensive operation, which is highly unscalable.Database connection operations are expensive and difficult to scale (large concurrency support).Feel the last database login operation is an instant thing, how expensive is it?Simply put, the listener receives a remote connection request and forwards it to the server

the index name"Created November 27, 2016"Mysql5.7/percona Version 5.7 Support2) The online DDL modifies the varchar field property when the table is not locked"created November 27, 2016"MySQL 5.7 has been enhanced for DDL functionality, and modifying the varchar field has not locked the table.* Algorithm for specifying the algorithm to create or delete an index* Copy means to create a temporary table and copy the data in full form, with the original table plus global read lock, according to the

/* (staring at the first draw)* Copyright Notice and version number of the program* Copyright (c) 2011, Yantai University Students ' School of computer Science* All rights reserved.* File name: Student Performance Management System* Author: Liujiangpo* Completed Date: June 23, 2012* Version number: v.623* Descriptive narrative of tasks and solutions* The gaze end of the program head*/#include "stdio.h" #inc

Talking about linux Performance Tuning 20: module management and Kernel Compiling 19: linux Performance Tuning 19: lvm advanced use of http://www.bkjia.com/ OS /201307/232320.html module is a program with independent functions, it can be compiled separately, but cannot run independently. It is linked to the kernel at runtime and runs in the kernel space as part o

, installation Memcacheyum install autoconf -ytar xzvf memcache-2.2.7.tgz -C /opt/cd /opt/memcache-2.2.7/usr/local/php5/bin/phpize //增加为PHP的模块后再对memcache进行配置编译./configure --enable-memcache --with-php-config=/usr/local/php5/bin/php-config //配置make make install/usr/local/php5/lib/php/extensions/no-debug-zts-20131226/ //记录编译安装完的最后一行此内容，下面用到vim /usr/local/php5/php.ini //搜索并修改下面一行，再新增一行内容如下extension_dir = "/usr/local/php5/lib/php/extensions/no-debug-zts-20131226/" The following is the client

Tags: max des from work query optimization select Run ASE Query1. Import trace files, such as duration >5000ms, collected by SQL Server profile into the sample table analysis or with the query optimizer advisor 2. You can use the DMV dynamic management view to query analysis SQL Server performance, usage, such as querying the last 50 most time-consuming SQL. 　　 --The last SQL that consumes the most CPU:

1) Delete the property of an object slows this object (15 times times more memory is consumed)var o = {x: ' Y ' }; Delete // at this point O will become a slow object // var o = {x: ' y 'null; // it should be .2) ClosuresWhen a variable outside the closure is introduced into the closure, the object cannot be garbage collected (GC) when the closure ends.var function () { varnew Array (1000000). Join (' x '); return function () { return largestr; }} ();3) Dom leaksWhen the original COM is

publicclassGrade{private:doubleenglish; double math;double Chinese;public:Grade(doubleenglish,doublemath,double Chinese) {this.english=english;this.math=math;this.Chinese = Chinese;} doubleSum() {returnThis.english+this.math+this.Chinese;} void displayTotal() {System.out.println(sum());} doubleaverage() {return sum()/3;} void displayAverage() {System.out.println(average());} doublegetEnglish() {returnenglish;} voidsetEnglish(doubleenglish) {this.english = english;} doublegetMath() {returnmat

(Mutexptr.get ());} private:tr1::shared_ptrSo later, when the number of references is 0 o'clock, the unlock function is called.Assuming the unlock is not set, the object's resource is deleted, which is not the result we want.Workaround Three: Copy Bottom ResourceThe ability to have a random number of copies of a resource.When you copy a resource management object, it is a " deep copy ." not only the pointer will be made a copy. And a new memory is cr

By using a language that has a garbage collection mechanism, developers generally do not have to worry about memory management issues. However, the problem with JavaScript in memory management and collection is a bit different. One of the main problems is that the amount of available memory allocated to a Web browser is typically less than that allocated to a desktop application. The main purpose of this is

1 Performance Test summary of Telecom resource management systemChen Jianhui 2007-7-30 1.1 Technical problems and solutions 1.1.1 LoadRunner java Script unique parameter issuesWhen the static synchronized keyword was not used in the Dll,java script that originally used JNI to invoke Delphi, only 2 concurrent users were able to error the private static native synchronized String getUrl (); static{//System