Tag：Number of users
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Time：2021-4-29
Introduction:To sum up, we can count the number of errors, error rate, number of affected users, proportion of affected users and other indicators of different types of errors in a certain time range. In the detailed classification of indicators, we can also define monitoring with different dimensions, such as version number. Author: Youmeng + u-apm […]
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Time：2021-2-17
Today, I would like to share with you a mistake that may be made in the process of data analysis. In fact, many new people will make this problem, and some old people will make it, and they often don’t know when they are wrong. It happens that some readers are asking similar questions, so […]
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Time：2021-1-12
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 invest in venture capital. Big data of operators is relatively better than big data of Internet. Big […]
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Time：2020-12-3
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. […]
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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 […]
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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, […]
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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 […]
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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 […]
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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 […]
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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 […]
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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 […]
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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. […]
