InnoDB issue with auto-generated config file

Hi,
I see a strange looking issue after applying the auto generated my.cnf to the fresh installed Percona server.

Here is the config file:

[mysql]

CLIENT

port = 3306
socket = /var/run/mysqld/mysqld.sock

[mysqld]

GENERAL

user = mysql
default_storage_engine = InnoDB
socket = /var/run/mysqld/mysqld.sock
pid_file = /var/lib/mysql/ys-wa01.pid

MyISAM

key_buffer_size = 32M
myisam_recover = FORCE,BACKUP

SAFETY

max_allowed_packet = 16M
max_connect_errors = 1000000
innodb = FORCE

DATA STORAGE

datadir = /var/lib/mysql/data/

CACHES AND LIMITS

tmp_table_size = 32M
max_heap_table_size = 32M
query_cache_type = 0
query_cache_size = 0
max_connections = 500
thread_cache_size = 50
open_files_limit = 65535
table_definition_cache = 4096
table_open_cache = 4096

INNODB

innodb_flush_method = O_DIRECT
innodb_log_files_in_group = 2
innodb_log_file_size = 256M
innodb_flush_log_at_trx_commit = 2
innodb_file_per_table = 1
innodb_buffer_pool_size = 5G

LOGGING

log_error = /var/lib/mysql/data/mysql-error.log
log_queries_not_using_indexes = 1
slow_query_log = 1
slow_query_log_file = /var/lib/mysql/data/mysql-slow.log

Here is the result of my attempt to restart the server:

tail /var/log/mysql/mysql-error.log
InnoDB: Error: log file ./ib_logfile0 is of different size 0 5242880 bytes
InnoDB: than specified in the .cnf file 0 268435456 bytes!
130627 16:46:05 [ERROR] Plugin ‘InnoDB’ init function returned error.
130627 16:46:05 [ERROR] Plugin ‘InnoDB’ registration as a STORAGE ENGINE failed.
130627 16:46:05 [ERROR] Failed to initialize plugins.
130627 16:46:05 [ERROR] Aborting

130627 16:46:05 [Note] /usr/sbin/mysqld: Shutdown complete

130627 16:46:05 mysqld_safe mysqld from pid file /var/lib/mysql//ys-wa01.pid ended
root@ys-wa01:/var/lib/mysql/mysql#

if I remove the cnf file - everything is working file, I’m able to restart the server with no errors.

Thanks for your guys help!

Looks like your existing log file size (ib_logfile* in your data directory) are a different size (5MB) than what is now specified in your new configuration file (innodb_log_file_size = 256M). You can either adjust that variable in the config file to match your existing log file sizes, or you can remove / move your existing log files (ib_logfile*) and allow MySQL to recreate them at the newly specified size.