Mysql FIne Tuning - my.cnf

#
# The MySQL database server configuration file.
#
# You can copy this to one of:
# - "/etc/mysql/my.cnf" to set global options,
# - "~/.my.cnf" to set user-specific options.
#
# One can use all long options that the program supports.
# Run program with --help to get a list of available options and with
# --print-defaults to see which it would actually understand and use.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

# This will be passed to all mysql clients
# It has been reported that passwords should be enclosed with ticks/quotes
# escpecially if they contain "#" chars...
# Remember to edit /etc/mysql/debian.cnf when changing the socket location.
[client]
port        = 3306
socket      = /var/run/mysqld/mysqld.sock

# Here is entries for some specific programs
# The following values assume you have at least 32M ram

# This was formally known as [safe_mysqld]. Both versions are currently parsed.
[mysqld_safe]
nice        = 0
socket      = /var/run/mysqld/mysqld.sock

[mysqld]
#
# * Basic Settings
#
user        = mysql
port        = 3306
basedir     = /usr
datadir     = /var/lib/mysql
tmpdir      = /tmp
skip-external-locking
default-time-zone = 'America/Sao_Paulo'
pid-file    = /var/run/mysqld/mysqld.pid
socket      = /var/run/mysqld/mysqld.sock

lc-messages-dir = /usr/share/mysql
log_error = /var/log/mysql/error.log
max_heap_table_size            = 32M
query_cache_type               = 1
table_definition_cache         = 1024
thread_concurrency             = 3

#
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
bind-address        = 0.0.0.0
#
# * Fine Tuning
#
#key_buffer_size        = 16M
max_allowed_packet  = 16M
thread_stack        = 192K
thread_cache_size       = 50
# This replaces the startup script and checks MyISAM tables if needed
# the first time they are touched
myisam-recover         = BACKUP
expire_logs_days    = 1
max_binlog_size         = 100M
#
# * InnoDB
#
# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.
# Read the manual for more InnoDB related options. There are many!
#
# * Security Features
#
# http://dev.mysql.com/doc/refman/5.1/en/innodb-parameters.html
innodb_buffer_pool_size        = 512M
innodb_flush_log_at_trx_commit = 2
innodb_flush_method            = O_DIRECT   # See open(2) for O_DIRECT info.
innodb_log_file_size           = 128M
innodb_log_files_in_group      = 2
innodb_flush_log_at_trx_commit = 2
innodb_file_per_table          = 0
# Server system variables
# http://dev.mysql.com/doc/refman/5.1/en/server-system-variables.html
# key_buffer_size           = 128M
max_connections      = 50
open_files_limit     = 16384
query_cache_limit    = 256k
query_cache_size     = 80M
read_rnd_buffer_size = 8M
sort_buffer_size     = 12M
table_open_cache     = 4096
thread_cache_size    = 64
tmp_table_size       = 256M

[mysqldump]
quick
quote-names
max_allowed_packet  = 16M

[mysql]
#no-auto-rehash # faster start of mysql but no tab completition

[isamchk]
#key_buffer_size        = 16M

#
# * IMPORTANT: Additional settings that can override those from this file!
#   The files must end with '.cnf', otherwise they'll be ignored.
#