Tag:Number of users

  • Performance pressure test of mysqlslap

    Time:2020-12-1

    Series articles: MySQL advanced optimization (1) Advanced optimization of MySQL (2) Performance pressure test of mysqlslap Enter the MySQL container docker-compose exec mysql bash mysqlslap -a -u root -p -uroot -proot Start pressure testing – C number of users, – I execute several times, – create schema database need to be pressure tested – Q […]

  • Use redis to count the daily and monthly activities of users (practical version)

    Time:2020-11-16

    There are three common methods 1、 Set set (precise, space consuming) After the user logs in, the user ID is added to the set of redis, and the set will automatically de duplicate, similar to this: 127.0.0.1:6379> sadd users_2019_06_17 user1 (integer) 1 127.0.0.1:6379> sadd users_2019_06_17 user2 (integer) 1 127.0.0.1:6379> sadd users_2019_06_17 user3 (integer) 1 Obviously, […]

  • How powerful is big data of operators?

    Time:2020-10-31

    It’s not too much to say that data is money. Even if an Internet company loses money for a long time, as long as there are a large number of users as support, there will be investors to vigorously venture capital. Compared with internet big data, big data of operators is better than big data […]

  • Summary of mobile application testing technology

    Time:2020-10-7

    Summary of mobile application testing technology After graduation, I have been engaged in mobile terminal application testing. With more than ten years’ experience, I feel a little sad. This time, I write down my mobile application test experience in recent years and share it with you. In fact, testing is relatively simple, more complex than […]

  • What to do if spoole is always disconnected

    Time:2020-10-5

    preface I’ve done a previous one based onSwooleLong connected items for real-time collectionclientSome of the data. Not long after the launch, I found a problem: sometimesclientCan’t connectserverAnd the handshake failed(Websocketbe based onHTTPHandshake protocol to establish a connection) track location After the problem occurred, the first time to handle, check the process, log point, there is […]

  • How to analyze massive data based on bitmap

    Time:2020-9-13

    Author: Chen Kai Growing IO data development engineer, mainly responsible for the development and design of SAAS and op product data platform, currently specializing in micro service and data warehouse construction. Growing IO needs to process nearly 100 billion user behavior data every day. The “event analysis” module of the platform is a more frequently […]

  • JQuery + PHP + Ajax dynamic statistics display example

    Time:2020-8-7

    JQuery + PHP + Ajax to achieve a dynamic statistics display example, this example is to dynamically display the current number of online users on the page, of course, you can apply to other scenarios. First of all, we put the number to be counted in ා number: Currently online: Then we need to define […]

  • A practical service exception handling Guide

    Time:2020-8-2

    1. Service exception handling process 2. Load 2.1 check the load of the machine CPU top -b -n 1 |grep java|awk ‘{print “VIRT:”$5,”RES:”$6,”cpu:”$9″%”,”mem:”$10″%”}’ 2.2 finding threads with high CPU utilization top -p 25603 -H printf 0x%x 25842 jstack 25603 | grep 0x64f2 cat /proc/interrupts (1)CPU (2)Memory (3)IO (4)Network The CPU information can be monitored from the following aspects:(1) Interruption;(2) Context switching;(3) Runnable queue;(4) CPU utilization. 3. […]

  • CentOS 7.3: lamp dynamic and static separation deployment

    Time:2020-7-24

    I wrote a blog post about deploying lamp platform before: building LNMP architecture based on CentOS 7, but it is deployed on the same server and can be used to test the website or when the traffic is not large. So? What if the web site is heavily visited? 1、 The concept of lamp dynamic […]

  • What about service exceptions? Recommend a super practical processing guide to you

    Time:2020-6-12

    1. Processing flow of service exception 2. Load 2.1 check the load of machine CPU top -b -n 1 |grep java|awk ‘{print “VIRT:”$5,”RES:”$6,”cpu:”$9″%”,”mem:”$10″%”}’ 2.2 find threads with high CPU usage top -p 25603 -H printf 0x%x 25842 jstack 25603 | grep 0x64f2 cat /proc/interrupts (1)CPU (2)Memory (3)IO (4)Network CPU information can be monitored from the following aspects:(1) Interruption;(2) Context switching;(3) Runnable queue;(4) CPU utilization. 3. Memory […]

  • Oracle licensing

    Time:2020-6-5

    Reason: because Party A is more concerned about some licensing issues, it will often ask, but the on-site personnel often don’t know much about the content of the license. Here, the content based on the network search is unified. Because most of the content comes from the Internet,If the description is not correct, please correct! […]

  • CentOS 7.3: lamp dynamic static separation deployment

    Time:2020-5-23

    I wrote a blog about deploying lamp platform before: building LNMP architecture based on CentOS 7, which is only deployed based on the same server and can be used for testing websites or when the number of visits is not large. So? What if the web site has a large number of visitors? 1、 Concept […]