How do I increase the size of InnoDB log?

How do I increase the size of InnoDB log?

To change the number or size of InnoDB log files, perform the following steps:

1. Stop the MySQL server and make sure that it shuts down without errors.
2. Edit my. cnf to change the log file configuration. To change the log file size, configure innodb_log_file_size .
3. Start the MySQL server again.

How do I change InnoDB variables?

Answer

1. Connect to a Plesk server via SSH.
2. Stop the MySQL service.
3. Open the MySQL configuration file my.cnf in a text editor.
4. Under the [mysqld] section, change the innodb_log_file_size value according to your needs (the default value is 48M):
5. Move the redo log files ib_logfile0 and ib_logfile1 to another directory.

What is InnoDB log file size?

The default log file size is 48MB. Generally, the combined size of the log files should be large enough that the server can smooth out peaks and troughs in workload activity, which often means that there is enough redo log space to handle more than an hour of write activity.

What is InnoDB redo log?

The redo log is a disk-based data structure used during crash recovery to correct data written by incomplete transactions. During normal operations, the redo log encodes requests to change table data that result from SQL statements or low-level API calls.

How does InnoDB check engine status?

SHOW ENGINE INNODB STATUS is a specific form of the SHOW ENGINE statement that displays the InnoDB Monitor output, which is extensive InnoDB information which can be useful in diagnosing problems.

How does InnoDB crash recovery happen?

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.

Can I delete ib_logfile0?

The ib_logfile* files are needed for InnoDB crash recovery. If you shut down InnoDB cleanly, you can remove them and change their size in the configuration file.

Is InnoDB the same as MySQL?

InnoDB is a general-purpose storage engine that balances high reliability and high performance. In MySQL 5.6, InnoDB is the default MySQL storage engine. Unless you have configured a different default storage engine, issuing a CREATE TABLE statement without an ENGINE clause creates an InnoDB table.

What causes MySQL deadlock?

Because both transactions are waiting for a resource to become available, neither ever release the locks it holds. A deadlock can occur when transactions lock rows in multiple tables (through statements such as UPDATE or SELECT FOR UPDATE ), but in the opposite order.

What is InnoDB force recovery?

The InnoDB recovery mode is a mode used for recovering from emergency situations. You should ensure you have a backup of your database before making changes in case you need to restore it. The innodb_force_recovery server system variable sets the recovery mode.

What is MySQL ib_logfile0?

The ib_logfile1 , ib_logfile0 form the redo log(a disk-based data structure used during crash recovery, to correct data written by incomplete transactions), beyond that, they record statements that attempt to change data in InnoDB tables.

Can I use MySQL online for free?

About MySQL MySQL is a open-source, free and very popular relational database management system which is developed, distributed and supported by Oracle corporation.

Is InnoDB open source?

InnoDB is a storage engine for the database management system MySQL and MariaDB. Since the release of MySQL 5.5….InnoDB.

How do you avoid deadlock in InnoDB?

Generally speaking, to avoid deadlock you must acquire lock always in the same order even in different transaction (e.g. always table A first, then table B). But if within one transaction you insert in only one table this condition is met, and this should then usually not lead to a deadlock.