一份优化的配置文件是MySQL数据库高效稳定运行的重要基础。

Percona公司提供了一个在线生成MySQL配置文件的工具，通过此工具的向导，回答一些简单问题，就可以得到一份经过Percona专家优化过的MySQL配置文件，并且格式清晰，还带有注释。强烈推荐大家去尝试一下。

地址：https://tools.percona.com/wizard

下面是我生成的一份用于MySQL 5.5版本的配置文件，供参考：

[mysql]

# CLIENT #
port                           = 3306
socket                         = /data/mysql/3306/mysql.sock

[mysqld]

# GENERAL #
user                           = mysql
default-storage-engine         = InnoDB
socket                         = /data/mysql/3306/mysql.sock
pid-file                       = /data/mysql/3306/mysql.pid

# MyISAM #
key-buffer-size                = 32M
myisam-recover                 = FORCE,BACKUP

# SAFETY #
max-allowed-packet             = 16M
max-connect-errors             = 1000000
skip-name-resolve
sql-mode                       = STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_AUTO_VALUE_ON_ZERO,NO_ENGINE_SUBSTITUTION,NO_ZERO_DATE,NO_ZERO_IN_DATE,ONLY_FULL_GROUP_BY
sysdate-is-now                 = 1
innodb                         = FORCE
innodb-strict-mode             = 1

# DATA STORAGE #
datadir                        = /data/mysql/3306/

# BINARY LOGGING #
log-bin                        = /data/mysql/3306/mysql-bin
expire-logs-days               = 14
sync-binlog                    = 1

# CACHES AND LIMITS #
tmp-table-size                 = 32M
max-heap-table-size            = 32M
query-cache-type               = 0
query-cache-size               = 0
max-connections                = 2000
thread-cache-size              = 100
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           = 512M
innodb-flush-log-at-trx-commit = 2
innodb-file-per-table          = 1
innodb-buffer-pool-size        = 54G

# LOGGING #
log-error                      = /data/mysql/3306/mysql-error.log
log-queries-not-using-indexes  = 1
slow-query-log                 = 1
slow-query-log-file            = /data/mysql/3306/mysql-slow.log

在线生成工具的网址在哪儿？

已经补充地址链接。