Home > Database > Mysql Tutorial > mysql性能最大化_MySQL

mysql性能最大化_MySQL

WBOY
Release: 2016-06-01 13:17:42
Original
1036 people have browsed it


[client]

#passwd = your_passwd

port = 3306

socket = /data/mysql/mysql.sock

[mysqld]

#global settings

port = 3306

socket = /data/mysql/mysql.sock

basedir=/usr/local/mysql

tmpdir=/data/mysql

datadir=/data/mysql

pid-file=/data/mysql/rongzhong.pid

#跳过外部锁定 只对MyISAM

skip-external-locking

#禁用tcp socket连接,只能使用unix/linux socket连接

skip_networking

#禁用DNS解析,提高连接速度

skip_name_resolve

#跳过授权表,忘记root密码时使用

#skip-grant-tables

#默认存储引擎

#default-storage-engine=MyISAM/INNODB

#默认字符集

character_set_server=utf8

#最大连接数

max_connections=20480

#最大单用户连接数

max_user_connections=1024

#服务器关闭一个交互连接前等待的秒数,默认28800

interactive_timeout=7200

#线程缓存数,直接利用空闲连接来创建新连接,1G ―> 8 2G ―> 16 3G ―> 32 >3G ―> 64

#短连接较多的情况下可以适当增加该值

thread_cache_size=64

#单个线程(连接)进行数据排序(eg: order/group by)时的buffer,连接创建时一次性分配,默认2M,当 Sort_merge_passes较大时可增加该值

sort_buffer_size=2M

#对没有索引的表进行join操作时的buffer,默认256K,连接创建时一次性分配

join_buffer_size=262144

#指定连接侦听队列的大小,该值超过OS的tcp_max_syn_backlog/somaxconn时无效,推荐设置为小于512的整数

back_log=512

#table_open_cache中岁多能打开的表数

table_open_cache = 256

#一次消息传输量的最大值,是net_buffer_length的最大值

max_allowed_packet=8M


#bin-log

#打开二进制日志

log-bin=mysql-bin

log-bin-index=mysql-bin.index

#日志格式,可选row/statement/mixed,默认statement,推荐mixed

binlog_format=mixed

#一个binlog的最大值

max_binlog_size=1G

#对单个连接的binlog缓存大小,默认1M

binlog_cache_size=2M

#binlog cache的总大小

max_binlog_cache_size=2G

#sync_binlog may be 0 or 1

#binlog是否进行磁盘同步,为0时交给OS,为1:事物结束立即同步,IO损耗大

sync_binlog=0

#slow-log

#开启slow log

slow-query-log=1

#指定慢查询的时长

long-query-time=2

#路径

slow-query-log-file=/data/mysql/slowlog/slow.log

#未使用索引的查询也记录到slow log中

log_queries_not_using_indexes=1

#query cache

#启用query cache

query_cache_type=1

#存放单条query cache的最大值,默认1M

query_cache_limit=1M

#存放单条query cache的最小值,默认4K

query_cache_min_res_unit=4096

#query的最大值

query_cache_size=256M


#MyISAM

#索引缓存大小,公式:Key_Size = key_number * (key_length+4)/0.67

key_buffer_size=128M

#单个线程进行顺序读取时的缓存,默认128K

read_buffer_size=2M

#单个线程进行随机读取时的缓存,默认256K

read_rnd_buffer_size = 4M

#重建索引时允许的最大缓存大小,默认8M

myisam_sort_buffer_size = 64M

#指定索引缓存中block大小,默认1K

key_cache_block_size=1024

#禁止索引的单条刷新

delay_key_write=1

#innodb

#启用独立的表空间

#innodb_file_per_table=1

#设置innodb内存缓冲区大小,在纯mysql环境下,推荐设置为服务器内存的60~80%

innodb_buffer_pool_size =8G

#设置OS能进入innodb内核的线程数,推荐2*(CPU核心数+磁盘数)

innodb_thread_concurrency=16

#设置innodb的io行为,可选值fsync/O_DSYNC/O_DIRECT 推荐O_DIRECT提高随机写效率

innodb_flush_method=O_DIRECT

#设置mysql主进程每秒钟向磁盘刷入的脏页数,默认值200

#For systems with inpidual 5400 RPM or 7200 RPM drives, you might lower the value to the former default of 100

innodb_io_capacity=100

#设置写脏页的线程数

innodb_write_io_threads = 8

#设置从磁盘读文件块的线程数

innodb_read_io_threads = 8

#设置事物日志缓冲区大小

#设置事物日志缓冲区大小

innodb_log_buffer_size=8M

#log thread向磁盘同步日志的方式,可选值为0/1/2

#0: 每秒钟刷新 1:每次事物提交后都刷新 2:交给OS来同步

innodb_flush_log_at_trx_commit =0

#数据库字典信息和表结构空间

innodb_additional_mem_pool_size =16M

#启用Double write Buffer区域,保证数据完整性,但消耗IO

innodb_doublewrite=1


[mysqldump]

# Do not buffer the whole result set in memory before writing it to file. Required for dumping very large tables

quick

max_allowed_packet = 16M

[mysql]

no-auto-rehash

[myisamchk]

key_buffer_size = 512M

sort_buffer_size = 512M

read_buffer = 8M

write_buffer = 8M

[mysqlhotcopy]

interactive-timeout

[mysqld_safe]

# Increase the amount of open files allowed per process. Warning: Make

# sure you have set the global system limit high enough! The high value

# is required for a large number of opened tables

open-files-limit = 8192




Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template