Explanation of server related indicators

QPS： full name Queries Per Second, intend “ Query rate per second ”, Is the number of queries a server can respond to per second , It is a measure of how much traffic a specific query server handles in a given period of time .

To put it simply ,QPS = req/sec = Number of requests / second . It represents the performance and maximum throughput of the server machine .

On the Internet , I saw someone introducing QPS when , Say so ：QPS It represents the number of successful requests to the server by a single process per second .

however QPS There is no emphasis on a single process in Baidu Encyclopedia or Wikipedia , It mainly emphasizes the processing capacity of the server .

Server's QPS Generally we can use http_load To test , Statistics office web Server throughput and load .

TPS namely Transactions Per Second Abbreviation , The number of transactions processed per second . A transaction is a process in which a client sends a request to the server and the server responds .

The client starts timing when it sends the request , End timing after receiving server response , This is used to calculate the time used and the number of transactions completed , The final assessment score made with this information .

TPS The process includes ： The client requests the server 、 Server internal processing 、 The server returns to the client .

Qps It's basically like Tps, But here's the difference , A visit to a page , To form a Tps; But a page request , There may be multiple requests to the server , The server requests for these , You can count in “Qps” In .

for example , Visit one Index The page will request the server 3 Time , Including once html, once css, once js, Then visiting this page will produce a “T”, Produce three “Q”.

PV（page view） That is, page views , It is usually the main index to measure a network news channel or website or even a network news .

PV namely page view, Page views . Every time users visit every page in the website, they are recorded 1 Time . Users refresh the same page many times , Total visits .

According to this feature , Brush the website PV It's easy to brush . And PV There's more to it RV, That is, the number of repeat visitors （repeat visitors）.

UV Number of visits （Unique Visitor） Refers to the number of independent visitors , Statistics 1 Number of users visiting a site in days ( With cookie On the basis of ), A computer terminal for a visitor .

It can be understood as the number of computers visiting a website . The website judges the identity of the visiting computer through the visiting computer cookies Realized . If replaced IP After but not clear cookies, Visit the same website again , In the statistics of this website UV Number is constant . If the user does not save cookies visit 、 wipe out cookies Or replace device access , Enumeration plus 1.00:00-24:00 Multiple access of the same client within is only counted as 1 A visitor . According to this feature , If someone asks you to brush UV, Also a good brush ！

IP（Internet Protocol） Independent IP Count , Refer to 1 How many independent in days IP Browse the page , That is, different statistics IP Number of browsing users . same IP No matter how many pages you visit , Independent IP The numbers are all 1; Different IP Browse page , Enumeration plus 1.IP Is based on user Wan IP Address to distinguish different visitors , therefore , Multiple users （ Multiple LANs IP） In the same router （ Same Wan IP） Internal internet access , May be recorded as an independent IP The visitor . If the user constantly changes IP, It may be counted many times .

GMV： So-called GMV, yes Gross Merchandise Volume For short . As long as it's an order , Whether the consumer pays or not 、 Does the seller deliver the goods 、 Is it a return , Can be put in GMV This “ Big baskets ” in .

E-commerce is very concerned about GMV Of , Pinduoduo's coupon accident , It is estimated that a lot of GMV.

according to GMV The statistical method of , If someone asks you to brush GMV, You can always place an order , Then keep refunding .

RPS Represents throughput , namely Requests Per Second Abbreviation . Throughput is a quantitative description of the concurrent processing power of a server , The unit is reqs/s, It refers to the number of requests processed in unit time under the number of concurrent users .

The maximum number of requests that can be processed per unit time under the number of concurrent users , It's called maximum throughput .

Someone put RPS To say is equivalent to QPS. In fact, it can be regarded as the same statistical method , It's just a different name .RPS/QPS, have access to apche ab Tools to measure .