Can we delete ibdata1?

Can we 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. As you want to reclaim the space from ibdata1 you actually have to delete the file: Stop mysql.

How do I lower ibdata1?

How to Shrink MySQL ibdata1 Size using innodb_file_per_table

1. Big MySQL (and MariaDB) System Tablespace.
2. Set the innodb_file_per_table parameter.
3. New Tables (and index) as individual files.
4. Extract existing tables from ibdata1.
5. Shrink ibdata1 File Size.
6. Backup the Database.
7. Drop all your database.
8. Delete ibdata and ib_logfile.

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. Of course, you should be careful when doing such changes. It is best to take backups first.

How do I restore InnoDB?

To manually recover your InnoDB tables, you need to follow the below listed steps:

1. Step 1: Bring up your database in recovery mode.
2. Step 2: Check which tables are corrupted.
3. Step 3: Backup and drop your corrupted tables.
4. Step 4: Restart MySQL in normal mode.
5. Step 5: Import backup .sql.
6. Step 6: Change port.

Can I delete IBD files?

To remove the new IBD file, execute the following sql command: ALTER TABLE mytable DISCARD TABLESPACE; This command removes the link between the table and the table space, and removes the IBD file.

What is Innodb_log_file_size?

innodb_log_file_size is the size of a log file (in bytes). There exist multiple log file for MySQL to write the data to. This particular system-variable tells the file size of one of such log files. You multiply those values and get the Redo log space that available to use.

Where is the ibdata1 file located in MySQL?

MySQL system tablespace is ibdata1, which is located under /var/lib/mysql. The single ibdata1 file contains all the tables and indexes in your MySQL database. 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).

How big is the file size of ibdata1?

Now, the ibdata1 file size will be around 100GB+. After few days, you deleted around 50GB worth of data from all those tables. The ibdata1 file size will not be reduced to around 50GB+, it will still stay at around 100GB+.

How to store InnoDB tables outside of ibdata1 file?

This file is very importante, since it holds the system tablespace of all the INNODB tables. By enabling innodb_file_per_table option, you can store data and index pages outside ibdata1 file, creating a single .ibd file for each table, also recommended since ibdata1 filesize keeps growing over time.

Is there a way to shrink the ibdata1 file?

The ibdata1 file can’t actually be shrunk unless you delete all databases, remove the files and reload a dump. But you can configure MySQL so that each table, including its indexes, is stored as a separate file. In that way ibdata1 will not grow as large.