Relevant when changing the number or the size of InnoDB log files.Īdditionally, you are no longer required remove old log files,Īlthough you may still want to copy the old log files to a safe place,Īs a backup. Then follow the instructions in the previous item.Īs of MySQL 5.6.8, the innodb_fast_shutdown setting is no longer Mysql> SET GLOBAL innodb_fast_shutdown = 1 If innodb_fast_shutdown is set to 2: Set innodb_fast_shutdown to 1: Mysqld sees that no InnoDB log files exist at startup and creates new Old redo log files to a safe place, in case something went wrongĭuring the shutdown and you need them to recover the tablespace.ĭelete the old log files from the log file directory, edit my.cnf toĬhange the log file configuration, and start the MySQL server again. No information for outstanding transactions in the redo log. Make sure that it shuts down without errors, to ensure that there is If innodb_fast_shutdown is not set to 2: Stop the MySQL server and To bring the system tablespace fully up-to-date before a shutdown On the value of innodb_fast_shutdown, which determines whether or not To change the number or the size of InnoDB log files in MySQL 5.6.7 orĮarlier, use the following instructions.
I would instead recommend the official method, which I reproduce here for convenience: Please note that setting innodb_fast_shutdown to 2 would clean the logs out as well but more moving parts still exist and gets picked on Crash Recovery during mysqld's startup. Now, this one-step is vital because every transaction uncommitted may have other moving parts within and outside of the InnoDB Transaction Logs ( See InnoDB Infrastructure). I updated my answer a little more with innodb_fast_shutdown because I used to restart mysql and stop mysql to do this. To keep to this option just add it to /etc/my.cnf: In addition, a shutdown will finish up any remaining items in the redo log.
Performing service mysql stop does this anyway. Setting this to zero keeps the number of dirty pages under 1% of the InnoDB Buffer Pool. It cleanly page out all data in the InnoDB Buffer Pool prior to redoing the Log Files, you should set this option about 1 hour before shutdown: SET GLOBAL innodb_max_dirty_pages_pct = 0 īy default, innodb_max_dirty_pages_pct is 75 (MySQL 5.5+) or 90 (prior to MySQL 5.5). Starting up mysqld will recreate ib_logfile0 and ib_logfile1 In light of this, just perform the following steps: mysql -uroot -p. Yes it is safe to delete the log file once mysqld has been shutdown So my question: Is it safe to delete the old log_files, or is there another method to change the innodb_log_file_size variable?
MYSQL FILE AFTER MAMP UPDATE REGISTRATION
cnf file 0 33554432 bytes!ġ10216 9:48:41 Plugin 'InnoDB' init function returned error.ġ10216 9:48:41 Plugin 'InnoDB' registration as a STORAGE ENGINE failed. ib_logfile0 is of different size 0 5242880 bytes When I restart the server, I get this error:ġ10216 9:48:41 InnoDB: Initializing buffer pool, size = 128.0Mġ10216 9:48:41 InnoDB: Completed initialization of buffer pool So now my my.cnf looks like this: # innodb When I went to change the innodb_log_file_size value (example my.cnf on mysql's innodb configuration page comments to change the log file size to 25% of the buffer size. I've got about 100MB in innodb, so I increased the innodb_buffer_pool_size variable to 128MB: mysql> show variables like 'innodb_buffer%' I'm slowly changing tables (where necessary) from MyIsam to InnoDB.
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