附：一个优化好后的主数据库配置文件和从数据配置文件内容如下：
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html
[client]
port=3306
socket=/usr/local/mysql/mysql.sock
default-character-set=utf8
[mysqld]
sync_binlog=1
server-id=1
port=3306
socket=/usr/local/mysql/mysql.sock
pid-file=/home/mysql/temp/my3306.pid
user=mysql
datadir=/home/mysql/data
tmpdir=/home/mysql/temp/
log-bin=/home/mysql/data/mysqlmaster-bin
log-error=/home/mysql/logs/error.log
slow_query_log_file=/home/mysql/logs/slow.log
binlog_format=mixed
slow_query_log
long_query_time=10
wait_timeout=31536000
interactive_timeout=31536000
max_connections=500
max_user_connections=490
max_connect_errors=2
character_set_server=utf8
skip-external-locking
key_buffer_size = 128M
max_allowed_packet = 5M
table_open_cache = 512
sort_buffer_size = 2M
read_buffer_size = 2M
read_rnd_buffer_size = 8M
myisam_sort_buffer_size = 64M
thread_cache_size = 8
query_cache_size = 32M
# Try number of CPU’s*2 for thread_concurrency
thread_concurrency = 4
binlog-ignore-db=mysql
binlog-ignore-db=information_schema
replicate_ignore_db=mysql
replicate_ignore_db=information_schema
expire-logs-days=10
skip-slave-start
skip-name-resolve
lower_case_table_names=1
log_bin_trust_function_creators=1
# InnoDB
innodb_data_home_dir=/home/mysql/data
innodb_log_group_home_dir=/home/mysql/logs
innodb_data_file_path=ibdata1:128M:autoextend
innodb_buffer_pool_size=2G
innodb_log_file_size=10M
innodb_log_buffer_size=8M
innodb_lock_wait_timeout=50
innodb_file_per_table
innodb_flush_log_at_trx_commit=1
#sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
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