最近做了个小项目，需要对百万级的数据进行查询检索，我用的数据库是mysql5.6.26，按照网上各种查询的资料对mysql的配置文件进行了优化，记录如下，以备不时之需。
修改文件：my-default.ini，下面是这个文件的全部内容，大部分直接摘自于网络
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.
[mysqld]
skip-name-resolve
max_connections=512
skip-locking #取消文件系统的外部锁
key_buffer = 512M #索引缓存,根据内存大小而定,如果是独立的db服务器,可以设置高达80%的内存总量
back_log = 200#连接排队列表总数
max_allowed_packet = 2M
#打开表缓存总数,可以避免频繁的打开数据表产生的开销
table_cache = 512
#每个线程排序所需的缓冲
sort_buffer_size = 4M
#MyISAM表发生变化时重新排序所需的缓冲
myisam_sort_buffer_size = 64M
#缓存可重用的线程数
thread_cache = 128
#查询结果缓存
query_cache_size = 128M
#最大并发线程数,cpu数量*2
thread_concurrency = 4
#记录慢查询,然后对慢查询一一优化
log_output=FILE # also can be FILE,TABLE or TABLE or NONE
slow-query-log=1
slow_query_log_file=log-slow-queries.log
long_query_time = 1
# 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 = .....
# 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