mysql-配置文件详解

一、软件版本

Percona Mysql 7.7

二、配置内容

# Generated by Percona Configuration Wizard (http://tools.percona.com/) version REL5-20120208
# Configuration name MysqlServer-Master generated for dingkaimx@163.com at 2018-04-18 13:48:46

[mysql]

# CLIENT #
port                           = 3306　　#监听端口
socket                         = /opt/mysql/mysql_log/mysql.sock　　#socket文件 可用于连接mysql

[mysqld]

# GENERAL #
user                           = mysql　　#运行mysql的用户
default-storage-engine         = InnoDB　　#默认存储引擎
socket                         = /opt/mysql/mysql_log/mysql.sock
pid-file                       = /opt/mysql/mysql_log/mysql.pid　　#程序pid
server-id                      = 1001　　#各个实例不能相同

# MyISAM #
key-buffer-size                = 32M
myisam-recover-options         = 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
innodb                         = FORCE

# DATA STORAGE #
datadir                        = /opt/mysql/mysql_data/　　#数据存储目录

# BINARY LOGGING #
log-bin                        = /opt/mysql/mysql_log/mysql-bin　　#bin-log文件路径
expire-logs-days               = 30　　#bin-log日志保留天数
sync-binlog                    = 1　　#每次变更操作写入bin-log后 立即刷新磁盘
binlog_format                  = ROW　　#bin-log格式

# REPLICATION #
gtid_mode                      = ON　　#开启GTID
enforce_gtid_consistency       = ON　　#开启GTID
relay-log                      = /opt/mysql/mysql_log/relay-bin　　#relag-log的位置
relay_log_info_repository      = TABLE　　#可选值为“FILE”、“TABLE”，用于保存slave读取relay log的位置信息，以便crash重启后继续恢复；“FILE”表示将信息写入relay-log.info文件，“TABLE”表示将信息写入mysql.slave_relay_log_info表中
sync-relay-log                 = 1　　#当设置为1时，slave的I/O线程每次接收到master发送过来的binlog日志都要写入系统缓冲区，然后刷入relay log中继日志里
sync-relay-log-info            = 1　　#启用之可确保无信息丢失
master_info_repository         = TABLE　　#用于实现在崩溃时保证二进制及从服务器安全的功能
sync-master-info               = 1　　#启用之可确保无信息丢失
# SLAVE #
#log_slave_updates              = ON　　#当从节点作为其他节点的主节点时需要开启
#read-only                      = 1　　#开启从库只读
#slave-net-timeout              = 60　　#从库认为主库在60s内不更新数据就挂了
#skip-slave-start               = 1　　#启动mysql时不启动主从复制，需要手动 start salve

# 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         = 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 = 1
innodb-file-per-table          = 1
innodb-buffer-pool-size        = 26G

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