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Knowledge Base

Can’t import database: Index column size too large. The maximum column size is 767 bytes

 
centosdatabasedatabasesdebianmariadb

Symptoms

Importing a database fails with the following error:

Failed to create tmp table example_table. Index column size too large. The maximum column size is 767 bytes.

Cause

There are insufficient InnoDB values configured in MariaDB.

Resolution

Increase the InnoDB values directly on the server files; steps vary by OS.

CentOS/RHEL-based
Ubuntu/Debian

   

   

  1. Log in via SSH

  2. Edit /etc/my.cnf with the following

    innodb_default_row_format = dynamic
    innodb_large_prefix = 1

  3. Restart MariaDB to apply the changes

    # systemctl restart mariadb

   

   

  1. Connect to the server via SSH

  2. Edit /etc/mysql/my.cnf with the following

    innodb_default_row_format = dynamic
    innodb_large_prefix = 1

  3. Restart MariaDB to apply the changes

    # systemctl restart mariadb

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