MYSQL在1G VPS上的性能优化配置

我的站目前都放在DigitalOcean上的1G VPS上面。除了这个博客还跑另外两个博客,都是跑在docker上，本想着1G内存足够了，没想到ghost退出过好几次，通过查log和监控发现，都是因为内存不够用被kill了。后来发现是mysql的配置还是默认配置，没有针对小内存优化过，所以很吃内存。不多说了，直接上配置。

[mysql]

# CLIENT #
port                           = 3306
socket                         = /var/lib/mysql/mysql.sock

[mysqld]

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

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

# SAFETY #
max-allowed-packet             = 16M
max-connect-errors             = 1000000
skip-name-resolve
innodb                         = FORCE

# DATA STORAGE #
datadir                        = /var/lib/mysql/

# CACHES AND LIMITS #
tmp-table-size                 = 32M
max-heap-table-size            = 32M
query-cache-type               = 0
query-cache-size               = 0
max-connections                = 500
thread-cache-size              = 50
open-files-limit               = 65535
table-definition-cache         = 1024
table-open-cache               = 2048

# INNODB #
innodb-flush-method            = O_DIRECT
innodb-log-files-in-group      = 2
innodb-log-file-size           = 64M
innodb-flush-log-at-trx-commit = 1
innodb-file-per-table          = 1
innodb-buffer-pool-size        = 512M

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

最后的慢查询部分可以根据你自己的需要调整下值，或者干脆关闭了。