Home Computer Tutorials Computer Knowledge MySQL writes crazy error logs

MySQL writes crazy error logs

Feb 18, 2024 pm 05:00 PM
mysql data log

MySQL 狂写错误日志

A core business database, the version is MySQL 8.34
Community Server Edition. Since going online, the error log of this database server has increased very rapidly (as shown in the figure below), increasing to a capacity of more than 10
G
every 24
hours.

Because there is a fault alarm and it has not affected normal access to the business, the relevant personnel are not allowed to restart the MySQL
service. In view of this situation, I had to set up an automatic scheduled task to clean these logs at a fixed time every night. For specific operations, on the system command line, execute "crontab -e"
and add the following text line:

00 01 * * * echo > /data/mysql8/data/mysql_db/mysql.log

Save and exit the edit mode. If you need to verify the correctness and validity of the task, you can modify the execution time to a fairly recent time point, and then compare the error log file "mysql.log#" before and after the task execution. ##" size, and check whether the cron
log has executed this scheduled task, as shown in the figure below.

During the Spring Festival holiday, everyone goes home to celebrate the New Year, and this is the lowest period for visits. Taking this opportunity, I plan to completely solve this problem. Seek opinions from relevant personnel and ask if it is possible to modify the MySQL

option file to block useless warning output? The reply was "
How long does it take to restart"
? The answer: "
A few minutes are enough"
.

What does this defined error log record in large quantities? Open the "mysql.log"

large file and find that it is full of warning messages. Use the system command "tail -f mysql.log"
. The screen output rolls like a motor flywheel. The specific data is shown in the figure below.

These warning messages indicate that the user account uses "mysql_native_password"

that is inconsistent with the default authentication method "
caching_sha2_password"
. The solution is to either change the password authentication method of all user accounts to "
caching_sha2_password"
, or the error log file "mysql.log"
does not record these warning messages. Since there are many user accounts and multiple businesses are designed, it is easier not to record warning messages. These warning messages are useless anyway (let it record real error logs, which will help troubleshooting).

MySQL

The host system Centos 7 where the server is located,
Open the option file "/etc/my.cnf"
in the text editor, and append the following text line in the text block [mysqld
] .

log-error-verbosity=1

By default, the "log-error-verbosity"

value of MySQL 8
is "3"
, which means that all "
errors, warnings and comments are recorded in the error log "
. The number "2
" means logging "errors and warnings", while the number "1
" means logging only "errors".

It should be noted that before modifying the option file, remember to back up first. This is common sense and also a regret medicine. After checking that there are no writing errors, restart the MySQL

service, and then check whether the local MySQL
service is normal, whether the remote master-slave synchronization is normal and whether there is any delay.

After running for a few minutes, check the error log of MySQL

to see if it no longer grows rapidly. After observing for a period of time, it is indeed true that the warning log of MySQL
is no longer recorded, and the growth rate of the file has also been greatly reduced.

The above is the detailed content of MySQL writes crazy error logs. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
1 months ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
1 months ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
1 months ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Chat Commands and How to Use Them
1 months ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

MySQL: Simple Concepts for Easy Learning MySQL: Simple Concepts for Easy Learning Apr 10, 2025 am 09:29 AM

MySQL is an open source relational database management system. 1) Create database and tables: Use the CREATEDATABASE and CREATETABLE commands. 2) Basic operations: INSERT, UPDATE, DELETE and SELECT. 3) Advanced operations: JOIN, subquery and transaction processing. 4) Debugging skills: Check syntax, data type and permissions. 5) Optimization suggestions: Use indexes, avoid SELECT* and use transactions.

How to open phpmyadmin How to open phpmyadmin Apr 10, 2025 pm 10:51 PM

You can open phpMyAdmin through the following steps: 1. Log in to the website control panel; 2. Find and click the phpMyAdmin icon; 3. Enter MySQL credentials; 4. Click "Login".

How to create navicat premium How to create navicat premium Apr 09, 2025 am 07:09 AM

Create a database using Navicat Premium: Connect to the database server and enter the connection parameters. Right-click on the server and select Create Database. Enter the name of the new database and the specified character set and collation. Connect to the new database and create the table in the Object Browser. Right-click on the table and select Insert Data to insert the data.

MySQL: An Introduction to the World's Most Popular Database MySQL: An Introduction to the World's Most Popular Database Apr 12, 2025 am 12:18 AM

MySQL is an open source relational database management system, mainly used to store and retrieve data quickly and reliably. Its working principle includes client requests, query resolution, execution of queries and return results. Examples of usage include creating tables, inserting and querying data, and advanced features such as JOIN operations. Common errors involve SQL syntax, data types, and permissions, and optimization suggestions include the use of indexes, optimized queries, and partitioning of tables.

How to create a new connection to mysql in navicat How to create a new connection to mysql in navicat Apr 09, 2025 am 07:21 AM

You can create a new MySQL connection in Navicat by following the steps: Open the application and select New Connection (Ctrl N). Select "MySQL" as the connection type. Enter the hostname/IP address, port, username, and password. (Optional) Configure advanced options. Save the connection and enter the connection name.

How to use single threaded redis How to use single threaded redis Apr 10, 2025 pm 07:12 PM

Redis uses a single threaded architecture to provide high performance, simplicity, and consistency. It utilizes I/O multiplexing, event loops, non-blocking I/O, and shared memory to improve concurrency, but with limitations of concurrency limitations, single point of failure, and unsuitable for write-intensive workloads.

MySQL and SQL: Essential Skills for Developers MySQL and SQL: Essential Skills for Developers Apr 10, 2025 am 09:30 AM

MySQL and SQL are essential skills for developers. 1.MySQL is an open source relational database management system, and SQL is the standard language used to manage and operate databases. 2.MySQL supports multiple storage engines through efficient data storage and retrieval functions, and SQL completes complex data operations through simple statements. 3. Examples of usage include basic queries and advanced queries, such as filtering and sorting by condition. 4. Common errors include syntax errors and performance issues, which can be optimized by checking SQL statements and using EXPLAIN commands. 5. Performance optimization techniques include using indexes, avoiding full table scanning, optimizing JOIN operations and improving code readability.

Why Use MySQL? Benefits and Advantages Why Use MySQL? Benefits and Advantages Apr 12, 2025 am 12:17 AM

MySQL is chosen for its performance, reliability, ease of use, and community support. 1.MySQL provides efficient data storage and retrieval functions, supporting multiple data types and advanced query operations. 2. Adopt client-server architecture and multiple storage engines to support transaction and query optimization. 3. Easy to use, supports a variety of operating systems and programming languages. 4. Have strong community support and provide rich resources and solutions.

See all articles