无聊的关于有效配置文件路径的备忘

原来阿里云服务器的mysql 5.5 , 配置/etc/my.cnf是没有任何作用的,需要编辑/etc/mysql/my.cnf

妈的, 就是这一点让我测试了两天, 太无聊了

create database test DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;

查看数据库的字符集：

SELECT TABLE_SCHEMA,

TABLE_NAME,

CCSA.CHARACTER_SET_NAME AS DEFAULT_CHAR_SET,

COLUMN_NAME,

COLUMN_TYPE,

C.CHARACTER_SET_NAME

FROM information_schema.TABLES AS T

JOIN information_schema.COLUMNS AS C USING (TABLE_SCHEMA, TABLE_NAME)

JOIN information_schema.COLLATION_CHARACTER_SET_APPLICABILITY AS CCSA

ON (T.TABLE_COLLATION = CCSA.COLLATION_NAME)

WHERE TABLE_SCHEMA=SCHEMA()

AND C.DATA_TYPE IN ('enum', 'varchar', 'char', 'text', 'mediumtext', 'longtext')

ORDER BY TABLE_SCHEMA,

TABLE_NAME,

COLUMN_NAME

;

修改数据库字符集：

alter database test character set utf8;

彻底删除apt-get autoremove --purge mysql-server-5.5

将以下内容添加到my.cnf

[mysqld]

character-set-server=utf8

collation-server=utf8_general_ci

SO

[client]

default-character-set=utf8

[mysql]

default-character-set=utf8

[mysqld]

collation-server = utf8_unicode_ci

init-connect='SET NAMES utf8'

character-set-server = utf8

default-character-set = utf8

初始化命令

sudo echo -e "[mysqld]\ncharacter-set-server=utf8\ncollation-server=utf8_general_ci" >> /etc/my.cnf

Mysql配置文件的加载顺序是依次按照以下来的:

Linux:

/etc/my.cnf

/etc/mysql/my.cnf

/usr/etc/my.cnf

~/.my.cnf

Windows:

C:\WINDOWS\my.ini

C:\WINDOWS\my.cnf

C:\my.ini

C:\my.cnf

C:\mysql\my.ini

C:\mysql\my.cnf

一般来说, 编辑/etc/my.cnf或C:\mysql\my.ini这两个文件就ok了

#

# The MySQL database server configuration file.

#

# You can copy this to one of:

# - "/etc/mysql/my.cnf" to set global options,

# - "~/.my.cnf" to set user-specific options.

#

# One can use all long options that the program supports.

# Run program with --help to get a list of available options and with

# --print-defaults to see which it would actually understand and use.

#

# For explanations see

# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

# This will be passed to all mysql clients

# It has been reported that passwords should be enclosed with ticks/quotes

# escpecially if they contain "#" chars...

# Remember to edit /etc/mysql/debian.cnf when changing the socket location.

[client]

port = 3306

socket = /var/run/mysqld/mysqld.sock

# Here is entries for some specific programs

# The following values assume you have at least 32M ram

# This was formally known as [safe_mysqld]. Both versions are currently parsed.

[mysqld_safe]

socket = /var/run/mysqld/mysqld.sock

nice = 0

[mysqld]

#

# * Basic Settings

#

user = mysql

pid-file = /var/run/mysqld/mysqld.pid

socket = /var/run/mysqld/mysqld.sock

port = 3306

basedir = /usr

datadir = /var/lib/mysql

tmpdir = /tmp

lc-messages-dir = /usr/share/mysql

skip-external-locking

#

# Instead of skip-networking the default is now to listen only on

# localhost which is more compatible and is not less secure.

bind-address = 127.0.0.1

#

# * Fine Tuning

#

key_buffer = 16M

max_allowed_packet = 16M

thread_stack = 192K

thread_cache_size = 8

# This replaces the startup script and checks MyISAM tables if needed

# the first time they are touched

myisam-recover = BACKUP

#max_connections = 100

#table_cache = 64

#thread_concurrency = 10

#

# * Query Cache Configuration

#

query_cache_limit = 1M

query_cache_size = 16M

#

# * Logging and Replication

#

# Both location gets rotated by the cronjob.

# Be aware that this log type is a performance killer.

# As of 5.1 you can enable the log at runtime!

#general_log_file = /var/log/mysql/mysql.log

#general_log = 1

#

# Error log - should be very few entries.

#

log_error = /var/log/mysql/error.log

#

# Here you can see queries with especially long duration

#log_slow_queries = /var/log/mysql/mysql-slow.log

#long_query_time = 2

#log-queries-not-using-indexes

#

# The following can be used as easy to replay backup logs or for replication.

# note: if you are setting up a replication slave, see README.Debian about

# other settings you may need to change.

#server-id = 1

#log_bin = /var/log/mysql/mysql-bin.log

expire_logs_days = 10

max_binlog_size = 100M

#binlog_do_db = include_database_name

#binlog_ignore_db = include_database_name

#

# * InnoDB

#

# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.

# Read the manual for more InnoDB related options. There are many!

#

# * Security Features

#

# Read the manual, too, if you want chroot!

# chroot = /var/lib/mysql/

#

# For generating SSL certificates I recommend the OpenSSL GUI "tinyca".

#

# ssl-ca=/etc/mysql/cacert.pem

# ssl-cert=/etc/mysql/server-cert.pem

# ssl-key=/etc/mysql/server-key.pem

[mysqldump]

quick

quote-names

max_allowed_packet = 16M

[mysql]

#no-auto-rehash # faster start of mysql but no tab completition

[isamchk]

key_buffer = 16M

#

# * IMPORTANT: Additional settings that can override those from this file!

# The files must end with '.cnf', otherwise they'll be ignored.

#

!includedir /etc/mysql/conf.d/