Where is ibdata1 located?

By default, this is the ibdata1 file located in the data directory, (as defined by either the datadir or innodb_data_home_dir system variables). InnoDB uses the system tablespace to store the data dictionary, change buffer, and undo logs.

Can I delete ibdata1?

The ibdata1 file can be shrinked if you delete all databases, remove the files and reload the mysqldump. We can configure MySQL so that each table, including its indexes, is stored as a separate file. It is enabled by default as of version 5.6. 6 of MySQL.

Why is ibdata1 so big?

The single ibdata1 file contains all the tables and indexes in your MySQL database. So, if you have a big database, this file size will grow really big.

How do you fix ibdata1?

Accidental deletion of ibdata1 file. Data corruption in ibdata1 file due to server crash, hardware failure, ransomware attack, etc….Method 1 – Recover InnoDB Database Manually

  1. Open the MySQL configuration file (my. cnf) on your server.
  2. Locate [mysqld] in the my. cnf file.
  3. Add the following line in [mysqld] section:

Can I remove 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.

What is ibtmp1?

If a value was not specified for this option explicitly, a temporary tablespace data file named ibtmp1 is created in innodb_data_home_dir , which defaults to the MySQL data directory if unspecified. To reclaim disk space occupied by a temporary tablespace data file, restart the MySQL server.

How do I recover my ibdata1 file?

Note: Make sure that the ib_logfile0 file size must be same as the ib_logfile1 file.

  1. Now copy the ibdata files to the MySQL data directory: cp –r /new/ibdata* /var/lib/mysql/
  2. Inside the new MySQL datadir, create an empty folder.
  3. Start your MySQL server again: service mysqld restart.

How do I recover files from ibdata1?

Can I delete ibtmp1?

In mysql 5.7 and higher all you need to do to reclaim the space used by the ibtmp1 file is restart the service. You do not have to set GLOBAL innodb_fast_shutdown = 0; or manually delete the file.

What is Innodb_file_per_table?

InnoDB creates tables in file-per-table tablespaces by default. This behavior is controlled by the innodb_file_per_table variable. Disabling innodb_file_per_table causes InnoDB to create tables in the system tablespace.