introduction to linear optimization

larger chunks before calling send. Because the Send bufferis very likely to be copied to the kernel buffer, so the buffer should not be too large, usually a little bit smaller than 8K is very efficient.Only the Winsock kernel buffers areWith a block of data greater than the MTU value, several packets are sent. The last packet left.The sender, in addition to the last packet, will nottriggered by a timer of 200 milliseconds.2, if possible, avoid one-way socket data stream.3, do not set SO_SNDBUF

Introduction to performance optimization tools in Cocos development-Visual Studio Memory leakage detection tools-Visual Leak Detector and cocosleakSo what kind of good memory leak detection tools are available in Windows? Microsoft provides Visual Studio development tools without any good memory Leak detection function. We can use a third-party tool Visual Leak Detector (vld ). Vld is a small, easy-to-use,

MySQL Performance optimization parameter introduction the company's website traffic is getting bigger and bigger, and MySQL naturally becomes a bottleneck. Therefore, I have been studying MySQL optimization recently. The first step naturally comes to mind is the optimization of MySQL system parameters, as a database sy

Brief introduction　 String is the most important data type in Java. Strings are one of the most important objects in software development, and in general, string objects always occupy the largest chunk of space in memory. Therefore, the efficient processing of strings will improve the overall performance of the system.In the Java language, a string object can be thought of as a derivation and further encapsulation of a char array. Its main compon

QR Code Scan Code is a very common technology, there are many open source projects can be implemented, such as Zxing project. Https://github.com/zxingHere is not the focus of the introduction of zxing in the implementation of the QR Code scan code, but to introduce, on the Fast Scan code technology is how to optimize the experience.To achieve in the light, the phone automatically fill the light, actually very simple, everyone knows that there are many

(HREF);//find the label of the anchor point corresponding ID in the content, if the corresponding anchor name is #siteskill, then return Let top=Element.offsettop; Let N= -;//Number of movesLet t= -/n;//How often do you move?Let currenttop=window.scrolly;//Where you areLet targettop=top- the;//Target Locationvar s= (targettop-currenttop)/n;//distance of each moveLet i=0; LetID=setinterval (() ={ if(i===N) {Window.clearinterval (ID); Return } //Stop animation wh

Leakcanary memory leak monitoring Performance optimization Introduction principleGithub:https://github.com/square/leakcanaryDemo Address: Https://github.com/baiqiantao/LeakCanaryTest.gitDirectoryDirectorySimple to useMore aboutCustom LeakcanaryTest caseApplicationMainactivityMemory leaks caused by static membersSingle-Instance memory leakSimple to useA memory leak detection 内存泄露检测 Library for Android and Ja

memcache distributed is the client program through the hash algorithm to get the key to achieve, different languages may be different hash algorithm, the same client program may also use dissimilar methods, so in the multi-language, multi-module sharing the same set of memcached services, It is important to note that the same hash algorithm is selected on the client6. You can disable LRU substitution with the-m parameter when starting memcached, and add and set will return failure when memory r

This paper mainly explains some important parameters of PHP-FPM under Linux, and introduces in detail the PHP-FPM parameter optimization of performance. php-fpm.conf Important Parameters Detailed PID = Run/php-fpm.pid#pid设置, the default is var/run/php-fpm.pid in the installation directory, it is recommended to turn on Error_log = Log/php-fpm.log#错误日志, Var/log/php-fpm.log in the installation directory by default Log_level = Notice#错误级别. The available

code. Double-click helloworld :: init () can enter the program code ,. The 33rd lines of code shown in the figure are program code leaks, which are not difficult to find out.If we want to further evaluate the memory usage, we can look at the line chart of the allocations template. We can also see the memory usage of various variables at a certain time point. The heap (HEAP) memory usage in Area 4 is because the heap memory needs to be manually released, and the stack memory does not need to be

Introduction of Mysqlcheck The Mysqlcheck client can examine and repair the MyISAM table. It can also optimize and analyze tables. Mysqlcheck function is similar to MYISAMCHK, but its work is different. The main difference is that when the MYSQLD server has to use Mysqlcheck at run time, Myisamchk applies to the server when it is not running. The advantage of using Mysqlcheck is that you do not need to stop the server to check or fix the table. Usin

Represents the local port number that the TCP/UDP protocol allows to use 32768 61000 1024 65000 /proc/sys/net/ipv4/tcp_max_syn_backlog The maximum number that can be saved in the queue for connection requests that have not yet been confirmed by the other. If the server is overloaded frequently, try increasing this number. 2048 2048 /proc/sys/net/ipv4/tcp_low_latency This option should be disabled if the TCP/IP stack is allowed to ac

tail is definitely not the optimal strategy, so it pops up tail--Finally encountered: Slop (List[tail-1],list[tail]) Then F[n] is the answer. Reference Code:#include #includeusing namespacestd;Long Longf[51000],q[51000],s[51000];intn,l;DoubleXinti) { return 2.0*s[i];}DoubleYinti) { returnf[i]+ (s[i]+l) * (s[i]+L);}DoubleSlopintIintj) { return(Y (j)-Y (i))/(X (j)-X (i));}intMain () {scanf ("%d%d", n,l); l++; s[0]=0; for(intI=1; i) { intx; scanf ("%d", x); x + +; S[i]=s[

Label:I recommend an optimization theory that uses top-down. This approach begins by analyzing the instance-level wait time, which is continuously refined through a series of steps to find out which processes/components are causing a lot of waiting in the system. Once you find these annoying processes, you can focus on optimizing them, which is not the main step of this methodology: 1. Parsing instance-level waits 2. Associating waits and Queues 3. Id

Tags: logs time dba free use Baidu src es2017 sizeCurrent Oracle Database Best Test Tool otest * Otest is used for Oracle database testing, optimization, and monitoring software. * Otest is available free of charge to Oracle customers and the vast majority of DBA engineers. Developed by the original technical expert Wang Wenjie in spare time, and provides support. Send email to [email protected] for support and the latest version, as well as apply fo

Label:Original: SQL Server performance Optimization (i)--IntroductionFirst, the reasons for performance optimization:It sounds a bit superfluous, but let's say it in detail:1, cost savings: Here the cost is not necessarily money, but basically can be disguised as saving money. Performance up, the hardware that would have to be invested can slow down the investment, from another point of view it is to save money.2, increase efficiency: for customers, p

resolution order is DNS à NIS à/etc/hosts. You can use/etc/netsvc. CONF file or nsorder environment variable to change the default name resolution order to speed up name resolution. If/etc/netsvc. if both the conf file and the nsorder environment variable exist, nsorder takes effect. Use the nsorder variable to change the resolution sequence, which is defined using the following method: Export nsorder = Local, NIS, bind Use the/etc/netsvc. conf file and add the following to the file: Hosts =

change, only the TCP protocol can pass, if there are other protocols besides TCP?650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/8B/6B/wKioL1hORXfjoFpuAAAWhQFGPfM762.png "title=" 1.png " alt= "Wkiol1horxfjofpuaaawhqfgpfm762.png"/>Just change it.If you want to highlight the force and make your MQ stronger, we should also add the following fields:There is also an additional set of thread pool core worker threads used by NIO and the maximum number of worker threads.This article is from