Programmer Help

Installation instructions: A mysql program file, a configuration file, running multiple mysql instances (each with its own distinct data directory).For the convenience of the test, only two examples are used in this experiment. MySQL program installation directory: /usr/local/mysql_5.6.38 Data directories for MySQL i ...

Installation instructions: A mysql program file, a configuration file, running multiple mysql instances (each with its own distinct data directory).For the convenience of the test, only two examples are used in this experiment. MySQL program installation directory: /usr/local/mysql_5.6.38 Data directories for MySQL i ...

Installation instructions: A mysql program file, a configuration file, running multiple mysql instances (each with its own distinct data directory).For the convenience of the test, only two examples are used in this experiment. MySQL program installation directory: /usr/local/mysql_5.6.38 Data directories for MySQL i ...

As an asynchronous event driven network application framework, Netty can be used to rapidly develop maintainable high-performance servers and clients. The bottom layer of Dubbo, a famous RPC framework in China, uses Netty as network communication. In this article, we will explore the nature of RPC fr ...

Does TCP have to be TCP?It might be a trick! It's raining so hard that you can write a joke. I wrote two essays about this article the other day:https://blog.csdn.net/dog250/article/details/106881244https://blog.csdn.net/dog250/article/details/106955747 It is very complex to want packets to be transmitted and processed as TCP. However, TCP ...

STM32+ESP-01 docking with Alibaba Feiyan platform In recent years, with the rapid development of microelectronics technology and computer information technology, the Internet of things technology has emerged, and the interconnection of everything is possible. At present, most consumer electronic prod ...

It's really hard to find out if a table in an instance has access.( A common method is to open a tcpdump or tshark persistent packet to filter suspected table names.( However, if we were using MySQL from the Percona branch, this would be much easier. Under Percona MySQL, we can open the userstat parameter and query the system statistics tabl ...

First look at the usage: val client = OkHttpClient.Builder().build() val request = Request.Builder() .url("https://www.baidu.com") .build() val call = client.newCall(request) call.enqueue(object : okhttp3.Callback { override fun onFailure(call: okhttp3.Call, e: IOException) { } override ...

socket programming socket socket introduction Use of socket udp sending data udp receiving data udp chat socket socket introduction Socket is also called "socket". Applications usually send requests to the network or answer network requests through "socket", so that the ho ...

catalog   sar introduction sar usage sar installation and startup sar usage 1. Historical statistics 2. Statistics of CPU usage Sar-u 23 ා statistics every 2 seconds three times in total sar -q ා view average load 3. Check memory usage 4. View system Swap partition information 5. View I/O ...