Question

I need to insert millions rows into the MySQL database (InnoDB engine). I have a problem with time when the tables have big sizes. Almost all time is spent on insert queries. Maybe somebody know how to optimize it?

Answer 1

To import large bulk of data into InnoDB:

1. set in MySQL configuration

   • innodb_doublewrite = 0
   • innodb_buffer_pool_size = 50%+ system memory
   • innodb_log_file_size = 512M
   • log-bin = 0
   • innodb_support_xa = 0
   • innodb_flush_log_at_trx_commit = 0

2. Add right after transaction start:

   SET FOREIGN_KEY_CHECKS = 0;

   SET UNIQUE_CHECKS = 0;

   SET AUTOCOMMIT = 0;

3. Set right before transaction end:

   SET UNIQUE_CHECKS = 1;

   SET FOREIGN_KEY_CHECKS = 1;