Course Intermediate  11244

Course Introduction："Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.

Course Advanced  17580

Course Introduction："Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.

Course Advanced  11290

Course Introduction："Brothers Band Front-end Example Display Video Tutorial" introduces examples of HTML5 and CSS3 technologies to everyone, so that everyone can become more proficient in using HTML5 and CSS3.

Course Introduction：1. Source of the problem When analyzing performance problems, slow queries and binlog slow transactions are commonly used methods. Recently, I was analyzing a slow query and found that it contained a large number of commit statements that were slow, but the matching could not be completed when analyzing the binlog slow transactions. For example, there may be 1,000 commit statements during this period, but there may be only 100 slow transactions. This is too big a difference, so why does this phenomenon occur? 2. The respective determination methods for slow transactions are usually as follows for an explicitly submitted (insert) transaction: GTID_LOG_EVENT and XID_EVENT are the time when the command ‘COMMIT’ is initiated.

2023-05-30 comment 0  1554

Course Introduction：Slow in jquery means "slow". The slow attribute value is used to control the animation speed of jquery animation effects. When the parameter value is set to "slow", the element's attributes will be slowly changed during the animation process. The syntax is " Element object.Element animation method ("slow")".

2021-12-29 comment 0  2402

Course Introduction：How do you make slow motion shots in Douyin videos? Douyin can process the video speed when shooting videos, and you can use snaps to speed up the video or slow down the video. Many friends still don’t know how to make the slow-motion lens of Douyin videos. The following is a summary of how to make slow-motion lenses of Douyin videos. Let’s take a look. How to use slow motion in Douyin videos 1. Open the Douyin app and click the [+] sign below. 2. Click [Fast and Slow]. 3. Select [Extremely Slow] or [Slow].

2024-06-27 comment 0  743

Course Introduction：In mysql, a slow query is a SQL statement that is recorded in the log and runs slowly. It refers to a SQL statement query that exceeds the time threshold set by the "long_query_time" parameter. Slow queries are recorded in the slow query log. Through the slow query log, you can find out which query statements have low execution efficiency for optimization.

2022-02-17 comment 0  7288

Course Introduction：How to construct slow query in mysql: 1. Modify the configuration file, add relevant code in [my.ini], define slow query time and slow query log record; 2. Enable slow query through MySQL database.

2020-11-02 comment 0  2223