Posts tagged innodb

mysql increase redo log size

posted on 2017-03-03 18:46

For tuning mysql innodb-wise it helps to allocate enough space in ram for the tables via the buffer pool. For this innodb_buffer_pool_size is to be increased as much as possible and needed, depending on your database size. mysqltuner may help discerning the minimum size, along with other hints.

Besides that the redo log has to be adjusted to about 1/6 of the buffer pool via innodb_log_file_size.

To fix this, there are more steps needed, else the mysql instance will not start properly after the next restart.

  1. start mysql client
  2. SET GLOBAL innodb_fast_shutdown=0
  3. \q
  4. service mysql stop
  5. fix both mentioned config vars, best in /etc/mysql/conf.d/zz_yourconfig.cnf
  6. rm /var/lib/mysql/ib_logfile*
  7. service mysql start

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