开发者社区> 流楚丶格念> 正文
阿里云
为了无法计算的价值
打开APP
阿里云APP内打开

MySQL配置文件my.ini详解

简介: MySQL配置文件my.ini详解
+关注继续查看

my.ini 是啥玩意?


my.ini是MySQL数据库中使用的配置文件,修改这个文件可以达到更新配置的目的。


my.ini 在哪放着呢?


my.ini存放在MySql安装的根目录,如图所示:(我比较懒,用的WAMP,大家找自己的安装目录即可)


image


my.ini的配置内容介绍:


其实大体可以分为两部分:客户端的参数、服务器参数。其中服务器参数里还包括 InnoDB存储引擎参数。


客户端的参数


下面显示的是客户端的参数,[client]和[mysql]都是客户端,下面是参数简介:


  1. port参数表示的是MySQL数据库的端口,默认的端口是3306,如果你需要更改端口号的话,就可以通过在这里修改。


  1. default-character-set参数是客户端默认的字符集,如果你希望它支持中文,可以设置成gbk或者utf8。


  1. 这里还有一个password参数,在这里设置了password参数的值就可以在登陆时不用输入密码直接进入


# CLIENT SECTION
# ----------------------------------------------------------------------
#
# The following options will be read by MySQL client applications.
# Note that only client applications shipped by MySQL are guaranteed
# to read this section. If you want your own MySQL client program to
# honor these values, you need to specify it as an option during the
# MySQL client library initialization.
#
[client]

port=3306

[mysql]

default-character-set=gb2312


服务器断参数:


以下是参数的介绍:


  1. port参数也是表示数据库的端口。


  1. basedir参数表示MySQL的安装路径。


  1. datadir参数表示MySQL数据文件的存储位置,也是数据库表的存放位置。


  1. default-character-set参数表示默认的字符集,这个字符集是服务器端的。


  1. default-storage-engine参数默认的存储引擎。


这里有两个引擎 MyISAM 和 InnoDB ,用什么看你需求,详细介绍可以参考下面这篇博文:https://yangyongli.blog.csdn.net/article/details/117213310


  1. sql-mode参数表示SQL模式的参数,通过这个参数可以设置检验SQL语句的严格程度。


  1. max_connections参数表示允许同时访问MySQL服务器的最大连接数,其中一个连接是保留的,留给管理员专用的。


  1. query_cache_size参数表示查询时的缓存大小,缓存中可以存储以前通过select语句查询过的信息,再次查询时就可以直接从缓存中拿出信息。


  1. table_cache参数表示所有进程打开表的总数。


  1. tmp_table_size参数表示内存中临时表的总数。


  1. thread_cache_size参数表示保留客户端线程的缓存。


  1. myisam_max_sort_file_size参数表示MySQL重建索引时所允许的最大临时文件的大小。


  1. myisam_sort_buffer_size参数表示重建索引时的缓存大小。


  1. key_buffer_size参数表示关键词的缓存大小。


  1. read_buffer_size参数表示MyISAM表全表扫描的缓存大小。


  1. read_rnd_buffer_size参数表示将排序好的数据存入该缓存中。


  1. sort_buffer_size参数表示用于排序的缓存大小


# SERVER SECTION
# ----------------------------------------------------------------------
#
# The following options will be read by the MySQL Server. Make sure that
# you have installed the server correctly (see above) so it reads this
# file.
#
[mysqld]

# The TCP/IP Port the MySQL Server will listen on
port=3306


#Path to installation directory. All paths are usually resolved relative to this.
basedir="E:/Java/Mysql/"

#Path to the database root
datadir="C:/ProgramData/MySQL/MySQL Server 5.5/Data/"

# The default character set that will be used when a new schema or table is
# created and no character set is defined
character-set-server=gb2312

# The default storage engine that will be used when create new tables when
default-storage-engine=INNODB

# Set the SQL mode to strict
sql-mode="STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"

# The maximum amount of concurrent sessions the MySQL server will
# allow. One of these connections will be reserved for a user with
# SUPER privileges to allow the administrator to login even if the
# connection limit has been reached.
max_connections=100

# Query cache is used to cache SELECT results and later return them
# without actual executing the same query once again. Having the query
# cache enabled may result in significant speed improvements, if your
# have a lot of identical queries and rarely changing tables. See the
# "Qcache_lowmem_prunes" status variable to check if the current value
# is high enough for your load.
# Note: In case your tables change very often or if your queries are
# textually different every time, the query cache may result in a
# slowdown instead of a performance improvement.
query_cache_size=0

# The number of open tables for all threads. Increasing this value
# increases the number of file descriptors that mysqld requires.
# Therefore you have to make sure to set the amount of open files
# allowed to at least 4096 in the variable "open-files-limit" in
# section [mysqld_safe]
table_cache=256

# Maximum size for internal (in-memory) temporary tables. If a table
# grows larger than this value, it is automatically converted to disk
# based table This limitation is for a single table. There can be many
# of them.
tmp_table_size=35M


# How many threads we should keep in a cache for reuse. When a client
# disconnects, the client's threads are put in the cache if there aren't
# more than thread_cache_size threads from before.  This greatly reduces
# the amount of thread creations needed if you have a lot of new
# connections. (Normally this doesn't give a notable performance
# improvement if you have a good thread implementation.)
thread_cache_size=8

#*** MyISAM Specific options

# The maximum size of the temporary file MySQL is allowed to use while
# recreating the index (during REPAIR, ALTER TABLE or LOAD DATA INFILE.
# If the file-size would be bigger than this, the index will be created
# through the key cache (which is slower).
myisam_max_sort_file_size=100G

# If the temporary file used for fast index creation would be bigger
# than using the key cache by the amount specified here, then prefer the
# key cache method.  This is mainly used to force long character keys in
# large tables to use the slower key cache method to create the index.
myisam_sort_buffer_size=69M

# Size of the Key Buffer, used to cache index blocks for MyISAM tables.
# Do not set it larger than 30% of your available memory, as some memory
# is also required by the OS to cache rows. Even if you're not using
# MyISAM tables, you should still set it to 8-64M as it will also be
# used for internal temporary disk tables.
key_buffer_size=55M

# Size of the buffer used for doing full table scans of MyISAM tables.
# Allocated per thread, if a full scan is needed.
read_buffer_size=64K
read_rnd_buffer_size=256K

# This buffer is allocated when MySQL needs to rebuild the index in
# REPAIR, OPTIMZE, ALTER table statements as well as in LOAD DATA INFILE
# into an empty table. It is allocated per thread so be careful with
# large settings.
sort_buffer_size=256K


InnoDB存储引擎使用的参数:


以下是参数的简介:


  1. innodb_additional_mem_pool_size参数表示附加的内存池,用来存储InnoDB表的内容。


  1. innodb_flush_log_at_trx_commit参数是设置提交日志的时机,若设置为1,InnoDB会在每次提交后将事务日志写到磁盘上。


  1. innodb_log_buffer_size参数表示用来存储日志数据的缓存区的大小。


  1. innodb_buffer_pool_size参数表示缓存的大小,InnoDB使用一个缓冲池类保存索引和原始数据。


  1. innodb_log_file_size参数表示日志文件的大小。


  1. innodb_thread_concurrency参数表示在InnoDB存储引擎允许的线程最大数。


#*** INNODB Specific options ***


# Use this option if you have a MySQL server with InnoDB support enabled
# but you do not plan to use it. This will save memory and disk space
# and speed up some things.
#skip-innodb

# Additional memory pool that is used by InnoDB to store metadata
# information.  If InnoDB requires more memory for this purpose it will
# start to allocate it from the OS.  As this is fast enough on most
# recent operating systems, you normally do not need to change this
# value. SHOW INNODB STATUS will display the current amount used.
innodb_additional_mem_pool_size=3M

# If set to 1, InnoDB will flush (fsync) the transaction logs to the
# disk at each commit, which offers full ACID behavior. If you are
# willing to compromise this safety, and you are running small
# transactions, you may set this to 0 or 2 to reduce disk I/O to the
# logs. Value 0 means that the log is only written to the log file and
# the log file flushed to disk approximately once per second. Value 2
# means the log is written to the log file at each commit, but the log
# file is only flushed to disk approximately once per second.
innodb_flush_log_at_trx_commit=1

# The size of the buffer InnoDB uses for buffering log data. As soon as
# it is full, InnoDB will have to flush it to disk. As it is flushed
# once per second anyway, it does not make sense to have it very large
# (even with long transactions).
innodb_log_buffer_size=2M

# InnoDB, unlike MyISAM, uses a buffer pool to cache both indexes and
# row data. The bigger you set this the less disk I/O is needed to
# access data in tables. On a dedicated database server you may set this
# parameter up to 80% of the machine physical memory size. Do not set it
# too large, though, because competition of the physical memory may
# cause paging in the operating system.  Note that on 32bit systems you
# might be limited to 2-3.5G of user level memory per process, so do not
# set it too high.
innodb_buffer_pool_size=107M

# Size of each log file in a log group. You should set the combined size
# of log files to about 25%-100% of your buffer pool size to avoid
# unneeded buffer pool flush activity on log file overwrite. However,
# note that a larger logfile size will increase the time needed for the
# recovery process.
innodb_log_file_size=54M

# Number of threads allowed inside the InnoDB kernel. The optimal value
# depends highly on the application, hardware as well as the OS
# scheduler properties. A too high value may lead to thread thrashing.
innodb_thread_concurrency=18


中文翻译版 my.ini


[client]  
port=3306  

[mysql]  
default-character-set=gbk  

[mysqld]
port = 3306
socket = /tmp/mysql.sock
# 设置mysql的安装目录
basedir=F:\\Hzq Soft\\MySql Server 51GA
# 设置mysql数据库的数据的存放目录,必须是data,或者是\\xxx-data
datadir=F:\\Hzq Soft\\MySql Server 51GA\\data
#innodb_log_arch_dir 默认datadir
#innodb_log_group_home_dir  默认datadir
# 设置mysql服务器的字符集,默认编码
default-character-set=utf8

#连接数的操作系统监听队列数量,如果经常出现“拒绝连接”错误可适当增加此值
back_log = 50
#不使用接听TCP / IP端口方法,mysqld通过命名管道连接
#skip-networking
# 最大连接数量
max_connections = 90
#打开表的线程数量限定,最大4096,除非用mysqld_safe打开限制
table_open_cache = 2048
#MySql 服务接收针对每个进程最大查询包大小
max_allowed_packet = 16M
#作用于SQL查询单笔处理使用的内存缓存,如果一笔操作的二进制数据超过了限定大小,将会在磁盘上开辟空间处理,一般设为 1-2M即可,默认1M
binlog_cache_size = 2M
#单个内存表的最大值限定
max_heap_table_size = 64M
#为每个线程分配的排序缓冲大小
sort_buffer_size = 8M
#join 连表操作的缓冲大小,根据实际业务来设置,默认8M
join_buffer_size = 32M
#操作多少个离开连接的线程的缓存
thread_cache_size = 8
#并发线程数量,默认为8,可适当增加到2倍以内。如果有多个CPU可以乘 上CPU的数量。双核CPU可以乘 上当前最核数再乘 上70%-85%
thread_concurrency = 16
#专用于具体SQL的缓存,如果提交的查询与几次中的某查询相同,并且在query缓存中存在,则直接返回缓存中的结果。
query_cache_size = 64M
#对应上一条设置,当查询的结果超过下面设置的大小时,将不会趣入到上面设置的缓存区中,避免了一个大的结果占据大量缓存。
query_cache_limit = 2M
#设置加全文检索中的最小单词长度。
#ft_min_word_len = 4
#CREATE TABLE 语句的默认表类型,如果不自己指定类型,则使用下行的类型
default-storage-engine = InnoDB
#线程堆栈大小,mysql说它自己用的堆栈大小不超过64K。这个值可适当设高一点(在RCA的项目中都是共用同一个数据库连接的),默认192K
thread_stack = 800K
#设置事务处理的级别,默认 REPEATABLE-READ,一般用它就即可,以下二行按顺序对应,
#可读写未提交的数据,创建未提交的数据副本读写,未提交之前可读不可写,只允许串行序列招行事务。
# READ-UNCOMMITTED, READ-COMMITTED, REPEATABLE-READ, SERIALIZABLE
transaction_isolation = REPEATABLE-READ
#单一内存临时表在内存中的大小,超过此值自动转换到磁盘操作
tmp_table_size = 64M
#启动二进制日志功能,可通过它实现时间点恢复最新的备份
#log-bin=mysql-bin
#二进制日志格式,对就上一条,-建议混合格式
#binlog_format=mixed
#转换查询为缓慢查询
slow_query_log
#对应上一条,如果一个查询超过了下条设定的时间则执行上一条。
long_query_time = 2
#自定义主机ID识别符,用于主从或多服务器之间识别,为 一个 int 类型
server-id = 1
#一般用来缓存MyISAM表的主键,也用于临时的磁盘表缓存主键,上面多次出现临时磁盘表,所以就算不用MyISAM也最好为其设置一个不小的值,默认32M
key_buffer_size = 56M
#全表扫描MyISAM表时的缓存,每个线程拥有下行的大小。
read_buffer_size = 2M
#排序操作时与磁盘之间的缓存,分到每个线程,默认16M
read_rnd_buffer_size = 16M
#MyISAM使用特殊树形进行批量插入时的缓存,如insert ... values(..)(..)(..)
bulk_insert_buffer_size = 64M
#MyISAM索引文件的最大限定,
myisam_max_sort_file_size = 12G
#如果一个myisam表有一个以上的索引, MyISAM可以使用一个以上线程来排序并行它们。较耗硬件资源,如果你的环境不错,可以增加此值。
myisam_repair_threads = 2
#自动检查和修复无法正确关闭MyISAM表。
myisam_recover
# *** INNODB Specific options ***
#开启下条将会禁用 INNODB
#skip-innodb
#一般不用设置或者说设了也没多大用,InnoDB会自己与操作系统交互管理其附加内存池所使用InnoDB的存储数据的大小
innodb_additional_mem_pool_size = 16M
#innodb整体缓冲池大小,不宜过大,设为本地内存的 50%-75% 比较合适,在本机开发过程中可以设得较小一点如 64M,256M
innodb_buffer_pool_size = 256M
#InnoDB的数据存储在一个或多个数据文件组成的表空间
innodb_data_file_path = ibdata1:10M:autoextend
#用于异步IO操作的线程数量,默认为 4 ,可适当提高
innodb_file_io_threads = 8
#线程数内允许的InnoDB内核,不宜太高
innodb_thread_concurrency = 14
#InnoDB的事务日志快存行为,默认为 1,为0可减轻磁盘I/0操作,还有以为2
innodb_flush_log_at_trx_commit = 1
#InnoDB的用于的缓冲日志数据的大小
innodb_log_buffer_size = 16M
#日志文件,可设置为25%-90%的总体缓存大小,默认 256M. 修改此项要先删除datadir\ib_logfileXXX
innodb_log_file_size = 256M
#日志组数量,默认为3
innodb_log_files_in_group = 3
#InnoDB的日志文件位置。默认是MySQL的datadir
#innodb_log_group_home_dir
#InnoDB最大允许的脏页缓冲池的百分比,默认90
innodb_max_dirty_pages_pct = 90
#事务死锁超时设定
innodb_lock_wait_timeout = 120

[client]
port = 3306
socket = /tmp/mysql.sock
# 设置mysql客户端的字符集
default-character-set=utf8

[mysqldump]
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash

# Only allow UPDATEs and DELETEs that use keys.
#safe-updates

[WinMySQLAdmin]
# 指定mysql服务启动启动的文件
Server=F:\\myweb\\MySql Server\\bin\\mysqld.exe

版权声明:本文内容由阿里云实名注册用户自发贡献,版权归原作者所有,阿里云开发者社区不拥有其著作权,亦不承担相应法律责任。具体规则请查看《阿里云开发者社区用户服务协议》和《阿里云开发者社区知识产权保护指引》。如果您发现本社区中有涉嫌抄袭的内容,填写侵权投诉表单进行举报,一经查实,本社区将立刻删除涉嫌侵权内容。

相关文章
uni-app 配置编译环境与动态修改manifest.json参数
uni-app 配置编译环境与动态修改manifest.json参数
398 0
Mysql数据库优化配置文件my.ini文件配置解释
Mysql数据的my.ini数据库优化的一些常用设置
4966 0
CentOS网络接口配置文件ifcfg-eth0详解
==CentOS网络接口配置文件ifcfg-eth0详解== 文件 /etc/sysconfig/network-scripts/ifcfg-eth0在/etc/sysconfig/network-script在这个目录下面,存放的是网络接口(网卡)的脚本文件(控制文件),ifcfg-eth0是默认的第一个网络接口,如果机器中有多网络接口,那么名字就将依此类推ifcfg-eth1,ifcfg-eth2,ifcfg-eth3......(这个文件重要,涉及到网络能否正常工作)。
2482 0
springmvc配置文件web.xml详解各方总结(转载)
Spring分为多个文件进行分别的配置,其中在servlet-name中如果没有指定init-param属性,那么系统自动寻找的spring配置文件为[servlet-name]-servlet.xml。
877 0
+关注
流楚丶格念
csdn平台优质创作者,51cto TOP博主,360图书馆科技博主,燕山大学目前大三在读,日拱一卒,功不唐捐,加油!!!
1010
文章
0
问答
文章排行榜
最热
最新
相关电子书
更多
低代码开发师(初级)实战教程
立即下载
阿里巴巴DevOps 最佳实践手册
立即下载
冬季实战营第三期:MySQL数据库进阶实战
立即下载