How to restart mysql

Перезапуск MySQL

В этой статье мы рассмотрим, как выполняется перезапуск MySQL в разных дистрибутивах Linux, а также как сделать, чтобы MySQL перезапускалась автоматически после падения.

Перезапуск MySQL или MariaDB

Вы можете попробовать использовать эти варианты, чтобы найти тот, что используется в вашей системе; последние версии Ubuntu понимают несколько имен MySQL. Таким образом, для MariaDB и выше перезапуск MySQL Сentos и Ubuntu не отличается. Просто попробуйте узнать состояние сервиса, если вы выбрали правильное название, то увидите что-то вроде этого:

Выполнить частичную перезагрузку только с обновлением конфигурации, так как это делалось в Apache и Nginx вы не сможете. Здесь необходимо полностью перезагружать сервис:

sudo systemctl restart mysql

В некоторых случаях необходимо полностью остановить работающий сервис, а потом запустить его заново. Для этого используем команду stop, затем start:

sudo systemctl stop mysql
sudo systemctl start mysql

Автоматический перезапуск MySQL

Из-за проблем с памятью на сервере или других ошибок MySQL может завершить свою работу. Это очень неприятное обстоятельство, поскольку вы не можете всегда следить за сервером, а когда такое случиться, ваш сайт будет недоступен для пользователей на протяжении долгого времени.

В systemd есть возможность, которая позволяет делать рестарт MySQL сразу же после того, как он неожиданно завершился. Для этого необходимо добавить такую строчку в конфигурацию юнит-файла MySQL:

Но обратите внимание, что редактировать файлы юнитов в папке /usr нельзя, потому что во время обновления они могут быть перезаписаны, можно только в /etc, и желательно создавать отдельный файл. Можно поступить проще: используйте команду systemctl edit:

sudo systemctl edit mariadb

Сохраните изменения. Эти строки будут записаны в виде отдельного файла, который автоматически подключается к основному.

Выводы

В этой статье мы рассмотрели, как перезапустить MySQL для обновления конфигурации, а также как настроить автоматический перезапуск службы после возникновения ошибок. Если у вас остались вопросы, спрашивайте в комментариях!

How to Restart MySQL in Ubuntu

MySQL is an RDMS (Relational Database Management System), which is used in the back-end development of any website, to store its data and the data is stored in the form of rows and columns, which are combined to form tables. With the help of MySQL, one can not only store data, but also can insert it, delete it, or modify it in tables, and to improve the performance of the system MySQL needs to be restarted. In this article, we will learn how to restart MySQL in Ubuntu by running simple commands.

How to validate the installation of MySQL in Ubuntu

Before restarting, MySQL first confirmed that MySQL is installed in Ubuntu or not. To verify this, we will run the command to check the version of MySQL:

The output is displaying the version details of MySQL which mean MySQL has been installed in Ubuntu.

How to restart MySQL using the systemctl command in Ubuntu

The systemctl command is used to start, restart, and stop the applications in Ubuntu and it is also used to check the status of applications. To restart MySQL, using the systemctl command:

Though successful execution of the above command without generating any error is the indication that MySQL has been restarted, we can confirm it by checking its status again using the systemctl command:

How to restart MySQL using the service command in Ubuntu

Likewise the systemctl command, the service command can also be used to manage the different applications to start, stop and restart. To restart MySQL in Ubuntu using the service command:

Once the command is executed, it will ask for the password for authentication purposes:

Type password, and click on Authenticate to proceed with the command. To confirm the successful execution of the above command, check the status of MySQL using the service command:

How to restart MySQL through init.d process in Ubuntu

Similar to the service and systemctl command, we can start, stop, and restart the applications by using the init.d command with the path of MySQL in Ubuntu. Before restarting the MySQL let us understand what is init.d?

There are many other services like ssh, MongoDB, etc whose scripts are located in this directory. When Linux is started, it’s the first process that initialized in Ubuntu is init.d, later on, other services start using init.d Now using the extension of “.d” with the path of a directory, which is stands for daemon, we can run these services and also supervise the processes. To restart MySQL in Ubuntu using the init.d:

Though from the output, it is being obvious the MySQL has been restarted but to confirm this by checking its status, run the command:

Conclusion

In MySQL after making changes in any configuration file, it is recommended to restart the MySQL, so modified changes can be implemented. To restart the MySQL in Ubuntu is not very tough, one has to simply run some simple commands in the terminal.

This article is related to the methods of the restart of MySQL in Ubuntu, three methods are discussed by using the systemctl command, by using the service command, or by using the init.d command. It is not recommended to restart the MySQL regularly because it removes the cache memory while restarting, and also engines have to wait until it starts again, as a result, it decreases the performance.

About the author

Hammad Zahid

I’m an Engineering graduate and my passion for IT has brought me to Linux. Now here I’m learning and sharing my knowledge with the world.

restart mysql server on windows 7

How do I restart MySQL on Windows 7?

I’m using HeidiSql as a front end and there’s no option in there.

The only other things I have is the MySQL 5.5 command line client.

9 Answers 9

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Open the command prompt and enter the following commands:

the MySQL service name maybe changes based on the version you installed. In my situation, MySQL version is MySQL Server 5.7. So I use the following command

You can restart the service through the UI by following these steps:

Open task manager (may need to run as administrator)

Click on the «Service» button and find the «MySql» service

NOTE: In some cases, the «MySql» service will be named whatever you named the initial database when you created the server. For example, if you called the initial database «myfirstdb», then the service would be called «myfirstdb». You should be able to find the service by sorting by the «Description» column as the description will be blank.

Right-click on the «MySql» service and choose the «Restart» option

Thanks to @Doug_Ivison and @Lucky for the service name notes and «run as administrator» clarification in the comments.

How to restart remote MySQL server running on Ubuntu linux?

I’m using Ubuntu 12.04 LTS.

There is on MySQL server situated remotely. I want to restart it.

Can someone please give me in detail step-by-step instructions to restart the MySQL server?

Following are the Database server details of MYSQL I got from phpMyAdmin UI:

Can someone please help me?

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If your mySQL service is named something else like mysqld you may have to change the command accordingly or try this: sudo /etc/init.d/mysql restart

If the above process will not work let’s check one the given code above you can stop Mysql server and again start server

sudo restart mysql

I SSH’ed into my AWS Lightsail wordpress instance, the following worked: sudo /opt/bitnami/ctlscript.sh restart mysql I learnt this here: https://docs.bitnami.com/aws/infrastructure/mysql/administration/control-services/

I have had a problem with my WordPress site, the connection with MySql has gone away, and to get it back I had to restart the server. This has been an annoying issue as I do not have that high traffic on the site.

I tried to check if MySQL is up and make the cronjob restart it but that does not work that well. I have been looking at the log, using.

In the log, I looked for shutdown messages or errors. I identified that the MySQL connection crashed when the server run out of memory, so why did it run out of memory. I started to optimize Mysql resources by using the optimization tool from Percona tools.

I also checked when my WordPress is running smoothly or what is causing heavy traffic peaks to your DB. One way is to increase the size of the server, I did not have that much traffic, so I installed the New Relic tool on my server to monitor the server resources to find out which processes are consuming memory.

I found out that the server did not have enough memory and MySQL can’t allocate what it needs so it crashes, what I did was add swap space to help this.

If that’s not enough, you may need to consider upgrading to a larger server. Either way, you should take a closer look at your memory consumption to better understand the problem.

How to Start, Stop, and Restart MySQL Server

When using MySQL, there are times when it’s important to know how to start, stop, or restart your MySQL server. Luckily, there are multiple, easy ways to do this. Which methods are available to you however, will depend on the operating system your running.

Read on to learn how to start, stop, and restart MySQL server in both Linux and Windows.

How to Start, Stop, and Restart MySQL Server in Linux

If you need to stop or restart your MySQL server on a Linux system, there are three different commands that can be used:

How to Start, Stop, and Restart MySQL Server in Windows

If you’re trying to start, stop, or restart your MySQL server on a Windows-based system, you can do so easily from the command line. Just follow these 3 steps:

And there you have it! You now have several different methods for starting, stopping, and restarting MySQL server as needed.

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