What does MySQL repair do?

What does MySQL repair do?

REPAIR TABLE repairs a possibly corrupted table, for certain storage engines only. This statement requires SELECT and INSERT privileges for the table. Although normally you should never have to run REPAIR TABLE , if disaster strikes, this statement is very likely to get back all your data from a MyISAM table.

How do I start a MySQL database?

Start MySQL Server

1. sudo service mysql start. Start MySQL Server using using init.d.
2. sudo /etc/init.d/mysql start. Start MySQL Server using systemd.
3. sudo systemctl start mysqld. Start MySQL Server on Windows.
4. mysqld.

How do I restart MySQL on Windows 10?

First, open the Run window by using the Windows+R keyboard. Second, type services. msc and press Enter : Third, select the MySQL service and click the restart button.

How do I use Mysqlcheck?

To use mysqlcheck, follow these steps:

1. As the root user, type the following command: cd /var/lib/mysql.
2. Type the following command, replacing database with the name of the database that you want to check:
3. Mysqlcheck checks the specified database and tables.

How to recover crashed InnoDB tables in MySQL database?

InnoDB: Doing recovery: scanned up to log sequence number 16040751132 180406 13:45:02 InnoDB: Starting an apply batch of log records to the database…

How to recover from an unexpected MySQL exit?

To recover from an unexpected MySQL server exit, the only requirement is to restart the MySQL server. InnoDB automatically checks the logs and performs a roll-forward of the database to the present. InnoDB automatically rolls back uncommitted transactions that were present at the time of the crash.

What to do if MySQL has trouble starting?

If MySQL still has trouble starting because of InnoDB consistency problems, see Section 15.21.3, “Forcing InnoDB Recovery” for steps to start the instance in recovery mode, which permits you to dump the data. To recover from an unexpected MySQL server exit, the only requirement is to restart the MySQL server.

How to recover a database in a crash?

You can do this by adding the parameter innodb_force_recovery, the value of the parameter is from 1 to 6, if you can recover the database using innodb_force_recovery value 1 you don’t lose any data and the condition of data will be very good. In any minor crash you can recover it using the value innodb_force_recovery = 1.