10 recommended articles about seconds

This is a Java library that can detect and normalize URL addresses in text. Today, we are very happy to share because my company Linkedin has open sourced a ULR detection tool we made: URL-Detector Java library. Linkedin checks hundreds of thousands of URLs every second. These URLs may come from malware or phishing websites. In order to ensure that each of our users has a safe browsing experience and prevent potential dangers, our back-end content inspection service program will check all user-generated content. In order to detect bad URLs on the scale of hundreds of thousands of user content per second, we need to have methods that can extract URLs from text at this scale quickly. There are two forms of URL addresses in our server: one is a single URL and the other is in a large piece of text content. If a single URL is sent, we can directly verify it through our content inspection service; if What is sent is a large block of text content. We will first pass it through our

1. Recommended articles about sniffers

Introduction: This is a Java library that can detect and normalize URL addresses in text. Today, we are very happy to share because my company, Linkedin, has open sourced a ULR detection tool we made: URL-Detector Java library. Linkedin checks hundreds of thousands of URLs every second. These URLs may come from malware or phishing websites. In order to ensure that each of our users has a safe browsing experience...

2. Detailed explanation of the new features of MySQL (Event Scheduler) Example

## Introduction: The event scheduler is a new feature after MySQL5.1 , the database can trigger certain operations according to a customized time period, which can be understood as a time trigger, similar to the task scheduler crontab under the Linux system, or similar to the scheduled tasks under the window. It is worth mentioning that MySQL's event scheduler can execute one task per second, while the operating system's scheduled tasks (such as CRON under Linux or task planning under Windows) can only execute one task per minute. Check whether the event function is turned on...

3. Image and text code sharing of Java-based open source URL sniffer

#Introduction: This is a Java library that can detect and normalize URL addresses in text. Today, we are very happy to share because the company I work for, Linkedin, has open sourced a ULR detection tool we made: the URL-Detector Java library. Linkedin checks hundreds of thousands of URLs every second. These URLs may come from malware or phishing websites. In order to ensure that each of our users has a safe browsing experience and prevent potential dangers, our back-end content inspection service program will check all user-generated content. ..

Benefits of Java multi-threading

## Introduction: Regardless of the challenges, the reason why multi-threading is still used is because multi-threading still has several benefits. Some of these benefits are: Better resource utilization Simple programming in some scenarios More responsive Better Resource Utilization of Applications Imagine an application reads and processes files from the local file system. Let's say reading a file from disk takes 5 seconds and processing it takes 2 seconds, executing two files will take: 5 seconds reading file A 2 seconds processing

5.

Introduction: 1. Deadlock has been ruled out. 2.show processlist; nearly a thousand query processes are blocked. 3. Extract the two SQL statements that have been waiting the most, and the execution time is nearly 1 second. Please help me analyze what else needs to be analyzed. It is blocked three or four times a month.

6. Causes of mysql blocking problem

Introduction: 1. Deadlock has been ruled out. 2.show processlist; nearly a thousand query processes are blocked. 3. Extract the two SQL statements that have been waiting the most, and the execution time is nearly 1 second. Please help me analyze what else needs to be analyzed. It is blocked three or four times a month.

7. What is the problem with 502 after refreshing the website for ten seconds? The server configuration is very high

Introduction: CPU: 2 cores, Memory: 8192 MB, Bandwidth 10Mbps. Open the homepage of the website, hold down f5, keep refreshing and then get 502. Mysql is used on the external network, and mysql does not hang. The other one has 2 cores, 2048 memory, and 2m bandwidth. I have never used lnmp, and the refresh will not kill it. Anyone encountered the same problem...

8. What is the problem when the website refreshes 502 after ten seconds? The server configuration is very high

Introduction: CPU: 2 cores, memory: 8192 MB, bandwidth 10Mbps. Open the homepage of the website, hold down f5, keep refreshing and then get 502. Mysql is used on the external network, and mysql does not hang. The other one has 2 cores, 2048 memory, and 2m bandwidth. I have never used lnmp, and the refresh will not kill it. Anyone encountered the same problem...

9. Obtain data every 10 seconds and find the average of 8640 times of data in a day. Is there any good algorithm?

Introduction: This is it. On my PHP side, I need to obtain the data of the sub-server every 10 seconds. If I write to the database every time, record the number of times and the final amount of data. It's too big. If there are 100 sub-servers, the performance problem will be more serious. I have considered writing redis, but if I write redis, the json string is also large enough, and...

10. How does the websocket server written by swoole limit the flow of a certain client?

Introduction: For example, after a certain client connects to my websocket server, it keeps sending me spam messages ddos ​​me. I want to set it to that client for ten seconds. You can only send a message to the websocket server once within a certain period of time. How to do this? Is this implemented using code in the server-side script written by swoole or in...

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