snapping bug

Now in the e-commerce industry, the second-kill snapping activity has been a popular means of business promotion. However, the inventory quantity is limited, while the number of orders exceeds the inventory, it will lead to the problem of goods oversold or even the stock becomes negative.Another example: snapping up train tickets, forum robbery, sweepstakes and even red Weibo comments will also lead to high

Snapping, second-kill is now a very common application scenario, the main need to solve the problem has two: 1 high concurrency on the database pressure 2 How to solve the correct inventory reduction ("oversold" problem) for the first problem, it is very easy to think of caching to handle snapping, avoid directly manipulating the database, For example, use Redis. The focus is on the second problem. Optimiza

Titlehtml>head>meta http-equiv="Content-type" Content="text/html; Charset=utf-8 ">title>Time-limited Snapping countdowntitle>style type="Text/css"> body{ text-align: center; }#first{ color:#ff7300; font-size:px; margin-left:tenpx; } style>script type="Text/javascript">Window.onload= function(){SetInterval (Changtime, -); function changtime(){document.getElementById ("Time"). Innerhtml=gettime (); Changestyle ();} function gR(){

entire Web request response time is pulled long, the Web server is gradually filled with the number of available connections, other normal business requests, no connection process available. The more terrible problem is that the behavior of the user is characteristic, the more unavailable The system is, the more frequent the user clicks, the vicious circle eventually leads to "avalanches" (one web machine hangs, causing traffic to spread to other working machines, causing the normal machines t

Millet marketing Way really let a person drunk, here will not spit. It's not a good way to grab a shopping spree, but a friend asks for help snapping up millet handsets. said that every time he snapped on the official website, not once successful, so I tried to use the browser plug-in to the automatic snapping, internet search for a lot of buying millet plug-ins or software. In the trust of the door home to

now in the e-commerce industry, the second-kill snapping activity has been a popular means of business promotion. However, the inventory quantity is limited, while the number of orders exceeds the inventory, it will lead to the problem of goods oversold or even the stock becomes negative. Another example: snapping up train tickets, forum robbery, sweepstakes and even red Weibo comments will also lead to h

This time to bring you php+redis Message Queuing to achieve snapping steps in detail (with code), Php+redis message queue to achieve the attention of snapping, the following is the actual case, together to see. Implementation features: 1. Based on Redis queue, prevent high concurrency of oversold2. mysql-based transaction lock to prevent high concurrent oversold Based on the Redis queue workflow: 1. The ad

Now in the e-commerce industry, the second-kill snapping activity has been a popular means of business promotion. However, the inventory quantity is limited, while the number of orders exceeds the inventory, it will lead to the problem of goods oversold or even the stock becomes negative.Another example: snapping up train tickets, forum robbery, sweepstakes and even red Weibo comments will also lead to high

Https://www.cnblogs.com/yeyinfu/p/7316972.html Ratelimiter is an implementation class provided by guava based on the token bucket algorithm, which can be very simple to complete the current limiting effects and adjust the rate of generation token according to the actual situation of the system. It can usually be used in snapping up the limit flow to prevent the burst system, restricting the amount of traffic in an interface, service unit time, for ex

Just used a little time to perfect the countdown to buy the function to do again, this is used in the original sound code, did not introduce the jquery library, although the obvious sense of native code to more, but write a small function or a sense of accomplishment. Need to pay attention to is the code order execution problem, must be clear-minded. Otherwise the code order is wrong, some functions can not be realized.learned that the original JS changed input disabled attribute value, because

Two problems of easy parameter under high concurrent request 1. Data error, resulting in product oversold. 2. Frequent database operations, resulting in degraded performance. This article mainly and everybody introduced in detail the PHP processing snapping up the function of high concurrent requests, with a certain reference value, interested in small partners can refer to, hope to help everyone. Test environment Windows7apache2.4.9php5.5.12PHP Fram

I have nothing to do a small program, the main function is the user snapped up goods, such as a commodity price is 40 yuan, each user out of 1 yuan, the user snapped record total equals 40, then this commodity is closed to purchase. I have a doubt, if the user is more concurrent how to do, if there are 10 users at the same time snapping and payment, how to ensure that the purchase record in the total number of purchases does not exceed the total pric

This example for you to share the Java Lottery snapping algorithm for everyone to refer to, the specific contents are as follows Application Scenarios Single-piece trophy snapping (limited)Multiple prizes are awarded according to Probability (limited, limited) Code implementation Table structure: --Lottery Set CREATE TABLE Award_info (ID number (one) not null, act_id number (one ), --Act

I originally wanted to develop a Xiaomi snapping artifact, why?Because of the millet product is too difficult to rob, forced me to sacrifice their own skills.As a start, the development of a self-developed, is going to rob a millet TV, millet router, millet 3-td, Xiaomi set-top box, millet mobile power, the Xiaomi family products all buy, these really cost-effective ah, low price, high configuration, super cost-effective.Just finished the automatic lo

Before we and everyone to share the PHP and Redis implementation of the mall seconds Kill function code sharing, this article is mainly for everyone to introduce the Php+redis message queue snapping implementation code, with a certain reference value, interested in small partners can refer to, hope to help everyone. Implementation features: 1. Based on Redis queue, prevent high concurrency of oversold2. mysql-based transaction lock to prevent high co

();varTodayx=now_fun-Diff;timeold= (Birthday-now_fun +diff); Sectimeold=timeold/1000;secondsold=Math.floor (sectimeold); Msperday=86400000; //* DaysE_daysold=timeold/msperday;daysold=Math.floor (e_daysold);//* HoursE_hrsold= (E_daysold-daysold) *24; Hrsold=Math.floor (e_hrsold); E_minsold= (e_hrsold-hrsold) *60; Minsold=math.floor ((e_hrsold-hrsold) *60); E_seconds= (e_minsold-minsold) *60; seconds=math.floor ((e_minsold-minsold) *60); Ms= e_seconds-Seconds;ms=NewString (ms) Ms= Ms.substr (2,3)

Private SubForm_keypress (Sender as ObjectE asKeyPressEventArgs)Handles Me. KeyPressIfE.keychar = ChrW ( -) Then DimMessge as NewMSG Messge.head.Text="Coming out of the system"MESSGE.MSGP.Text="Press ENTER to exit the system, ESC to return ..."Messge. Show ()End If IfE.keychar = CHR ( the) Then DimMessge as NewMSG Messge.head.Text="F4"MESSGE.MSGP.Text="You pressed the F4."Messge. Show ()End If IfE.keychar = CHR ( the) Then DimMessge as NewMSG Messg

role does the Preventdefault method play? We know for example Copy the code code as follows:Click the Baidu link at this time, will not open http://www.baidu.com, but just pop up a alert dialog box.Preventdefault method to explain here, Stoppropagation method? Before speaking stoppropagation method, we must first explain the JS event agent.The event agent uses two features that are often ignored in the Javasciprt event: event bubbling and the target element. When an event on an element is trigg

Pseudo code: Get ("Watchkey"); $total = ; Quantity if ($watchKey "; if (function_exists ("Fastcgi_finish_request")) { fastcgi_finish_request (); ProcessData ($data); } else{ $watchList = $redis->hgetall ("watchlist"); Async processing; } } else{ echo "bad luck"; Die; }}? > The above describes the use of Reids in the second kill snapping, including aspects of

if (! Modelstate.isvalid) {Liststring > SB = new Liststring > (); //get all the wrong key Liststring > Keys = ModelState.Keys.ToList (); //gets each key corresponding to the Modelstatedictionary foreach (Var key in Keys) {var errors = Modelstate[key]. Errors.tolist (); //add an error description to SB foreach (var error in errors) {sb. ADD (Error.