mysql 5.5默認配置參數：
[client]
port = 3306
socket = /usr/local/mysql/mysqld.sock
# The MySQL server
[mysqld]
port = 3306
socket = /usr/local/mysql/mysqld.sock
pid-file = /usr/local/mysql/mysql.pid
basedir = /usr/local/mysql
datadir = /mysql
user = mysql
character-set-server=utf8
collation-server=utf8_general_ci
skip-external-locking
skip-host-cache
skip-name-resolve
key_buffer_size = 1000M
max_connect_errors=1000
max_connections=32000
query_cache_size = 512M
general_log=1
general_log_file=/usr/local/mysql/log/mysql.log
log_error=/usr/local/mysql/log/mysql.err
log_isam=/usr/local/mysql/log/mysql.isam
slow_query_log=1
slow_query_log_file=/usr/local/mysql/log/slow-query.log
#tmp_table_size=256M
#max_heap_table_size=256M
server-id = 1 //這裏和mysql5.6不同
log-bin=/mysql/mysql-bin
binlog_format=mixed
expire_logs_days=10
default_storage_engine=InnoDB
innodb_buffer_pool_size = 2000M
#thread_cache_size = 8
#max_allowed_packet = 1M
#table_open_cache = 512
#sort_buffer_size = 2M
#read_buffer_size = 2M
#read_rnd_buffer_size = 8M
#myisam_sort_buffer_size = 64M
#thread_concurrency = 8
#connect_errors = 100
#skip-networking
#master-host = <hostname>
#master-user = <username>
#master-password = <password>
#master-port = <port>
#innodb_data_home_dir = /mysql
#innodb_data_file_path = ibdata1:2000M;ibdata2:10M:autoextend
#innodb_log_group_home_dir = /mysql
#innodb_additional_mem_pool_size = 20M
# Set .._log_file_size to 25 % of buffer pool size
#innodb_log_file_size = 100M
#innodb_log_buffer_size = 8M
#innodb_flush_log_at_trx_commit = 1
#innodb_lock_wait_timeout = 100
#[mysqldump]
#quick
#max_allowed_packet = 16M
#[mysql]
#no-auto-rehash
# Remove the next comment character if you are not familiar with SQL
#safe-updates
#[myisamchk]
#key_buffer_size = 256M
#sort_buffer_size = 256M
#read_buffer = 2M
#write_buffer = 2M
#[mysqlhotcopy]
#interactive-timeout
mysql5.6配置參數：
[client]
port = 3306
socket = /usr/local/mysql/mysqld.sock
[mysqld]
port = 3306
socket = /usr/local/mysql/mysqld.sock
pid-file = /usr/local/mysql/mysql.pid
basedir = /usr/local/mysql
datadir = /mysql
user = mysql
character-set-server=utf8
collation-server=utf8_general_ci
skip-external-locking
skip-host-cache
skip-name-resolve
key_buffer_size = 1000M
max_connect_errors=1000
max_connections=32000
query_cache_size = 512M
general_log=1
general_log_file=/usr/local/mysql/log/mysql.log
log_error=/usr/local/mysql/log/mysql.err
log_isam=/usr/local/mysql/log/mysql.isam
slow_query_log=1
slow_query_log_file=/usr/local/mysql/log/slow-query.log
#tmp_table_size=256M
#max_heap_table_size=256M
server-id = 1
log-bin=/mysql/mysql-bin
binlog_format=mixed
expire_logs_days=10
default_storage_engine=InnoDB
innodb_buffer_pool_size = 2000M
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# These are commonly set, remove the # and set as required.
# basedir = .....
# datadir = .....
# port = .....
# server_id = .....
# socket = .....
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
mysql5.5以上到mysql5.6主從有了很多新參數配置，增強可用和安全性：
mysql5.6主從參數總結如下，參數解釋看後面鏈接：
mysql5.6配置：
server_id = 1
#binlog
log-bin = /mysql/mysql-binlog
binlog_format = mixed
binlog-row-image = minimal
#gtid_mode = ON
#enforce-gtid-consistency = true
binlog_cache_size = 4M
#max_binlog_size = 1G
max_binlog_cache_size = 1G
sync_binlog = 1
slave-skip-errors = 1062
expire_logs_days = 10
slave_parallel_workers = 4
#relay log
relay-log = /mysql/relay-bin
max_relay_log_size = 1G
relay_log_purge = 1
relay_log_recovery = 1
master_info_repository = TABLE
relay_log_info_repository = TABLE
log_slave_updates
binlog_checksum = CRC32
slave_allow_batching = 1
master_verify_checksum = 1
slave_sql_verify_checksum = 1
binlog_rows_query_log_events = 1
skip_slave_start (阻止備庫奔潰後自動啓動複製）
sync_master_info = 1 (刷新到磁盤）
sync_relay_log = 1
sync_relay_log_info = 1
http://wangwei007.blog.51cto.com/68019/1205298