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WhatsApp's Erlang World

Rick's two PPT finishingDownload: 2012 2013, after six months of Erlang, re-look at the two ppt to find more value of the learning place, from the PPT organized as follows:-Prefer Os:timestamp to Erlang:nowThe use of Erlang:now () should be banned,

How to Use the netstat command on Linux to verify DDOS attacks

Server slowness may be caused by many events, such as incorrect configurations, scripts, and poor hardware. But sometimes it may be caused by a flood attack on your server using DOS or DDOS.DOS attacks or DDOS attacks are attacks that try to make

Installation, optimization, and security settings of MySql 5.0.x in CentOS

Groupadd mysql Create a user group named mysql Useradd-g mysql Create a user named mysql under the mysql user group Gunzip | mysql-VERSION.tar.gz | tar-xvf- Decompress the downloaded .gz File Cd mysql-VERSION Enter the decompressed directory CFLAGS =

Test case design for mobile app crashes

Source:Http://www.spasvo.com/news/html/201433180305.htmlThe increasing use of mobile devices in our daily lives means that the topic of mobile app testing has become an unavoidable problem to consider. According to recent research, it is difficult

The basic method for accessing direct odbc api database calls in AppBuilder!

Chapter 1: how to configure DSN for your development system:(1) Open the control panel of Windows. Select the ODBC Data Sources icon and double-click it to open the content. The ODBC Data Source Administrator dialog box is displayed.(2) Select User

Simple mercury route Wireless Bridge settings

In general, we only need a wireless router when setting up a wireless network, but for some network environments that cover a wide area, of course, the coverage of a wireless router is not enough. For this reason, people have invented a wireless

Test and solution for high memory usage and CPU usage of MySQL

I think many of my friends will find that their mysql occupies a large amount of internal and cpu resources. To solve this problem, most of us will directly reduce the number of mysql accesses and connections and directly generate static or cache

MySQL service optimization parameter settings reference

For details about MySQL service optimization parameter settings, refer to l general class: key_buffer_size. Meaning: the buffer size used for index blocks. Add indexes that can be better processed (for all read and multi-Rewrite ). Impact: the

Mysql Configuration | mysql configuration optimization | my. cnf Optimization

Mysql configuration optimization my. cnf optimization explanation MySQLPHP [client] default-character-setutf8port3306socketoptmysqlmysql.sock [mysqld] character-set-serverutf8usermysqlport3306socketoptmysqlmysql.sockbasediroptmysqldatadiropt Mysql

Please manually release your resources (Pleasereleaseresourcesmanually)

Author: Laruence () address of this article: www.laruence.com201207252662.html. Please indicate the source. I never thought this problem was a problem until yesterday. last night, I submitted an RFC about introducing finally to PHP. The starting

Optimization of MySQL Database System Parameters

(1) back_log: The number of connections that MySQL can have. When the main MySQL thread receives a lot of connection requests in a very short period of time, this works, and then the main thread takes some time (although very short) to check the

How does MySQL parameter settings solve the bottleneck effect?

The following articles mainly describe the specific operation steps of MySQL parameter settings on the website. We all know that the more traffic the website has, the more pressure the MySQL database has, forming a bottleneck effect. Therefore, the

MySQL Performance Optimization Path-modify the configuration file my. cnf

In the architecture of Apache, PHP, and MySQL, MySQL has the greatest impact on performance and is also a key core component. For Discuz! The same is true for Forum programs. Whether MySQL settings are reasonably optimized directly affects the speed

Generate multiple ADDM reports in Oracle

Generate multiple ADDM reports in OracleI have written an article in Oracle to generate AWR reports in batches. We used to monitor AWR reports every day to eliminate performance risks in a timely manner. Now there is another way to generate an ADDM

Summary of slow mysql Server Query

Summary of slow mysql Server Query Developers often find that they do not use indexed or limit n statements, which will have a great impact on the database, for example, a large table with tens of millions of records needs to be fully scanned, or

Mysql Server slow query Cause Analysis and Solution

Some developers, especially those who have contact with mysql, may encounter slow mysql queries. Of course, I am referring to a large data volume of millions or tens of millions, not dozens of times, next we will look at the solution to slow

What should I do if MySQL occupies a very high virtual memory?

This article introduces the solution for MySQL to occupy a very high virtual memory. If you need to learn, refer to this article. This article introduces the solution for MySQL to occupy a very high virtual memory. If you need to learn, refer to

MySQL Memory Allocation

MySQL memory allocation-Quick Setting Solution If you only use the MyISAM storage engine, set key_buffer_size to 20% of the available memory (plus innodb_buffer_pool_size = 0) If you only use the InnoDB Storage engine, set innodb_buffer_pool_size to

Front-end optimization points of DiscuzX in Jincheng bar

Recently, KANG Sheng's DX version is basically determined, at least it will not change in a short period of time. Therefore, I optimized the whole site of Jincheng bar and recorded my operations, one is to keep a record to prevent forgetting, and

Mysql optimization (2) index Optimization Configuration Optimization

  2 Index and Query Optimization Index type Ø normal index: This is the most basic index type and has no restrictions such as uniqueness. Ø unique index: It is basically the same as a normal index, but all index column values are unique. Ø primary

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