本文主要是介绍mysql优化参数 （汇总），对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

1 如下为128G内存32线程处理器的mariadb配置参数优化：

[client]
#password= your_password
port= 3306
socket= /tmp/mysql.sock
!includedir /opt/local/mysql/wsrep
# The MySQL server
[mysqld]
port= 3306
socket= /tmp/mysql.sock
basedir = /opt/local/mysql
datadir=/opt/local/mysql/data #数据库存放目录
relay-log=/opt/local/mysql/relaylog/s74-relay-bin
pid-file = /opt/local/mysql/mysql.pid
log-error = /opt/local/mysql/logs/mysqld.log
open_files_limit = 65535 #
#skip-locking
skip-external-locking #跳过外部锁定
back_log=3000 #暂存的连接数量
skip-name-resolve #关闭mysql的dns反查功能
memlock #将mysqld 进程锁定在内存中
lower_case_table_names = 1
#query_response_time_stats=1
#core-file
#core-file-size = unlimited
query_cache_type=1 #查询缓存 (0 = off、1 = on、2 = demand)
performance_schema=0 #收集数据库服务器性能参数
net_read_timeout=3600 #连接繁忙阶段（query）起作用
net_write_timeout=3600 #连接繁忙阶段（query）起作用
key_buffer_size = 32M #设置索引块缓存大小
max_allowed_packet = 128M #通信缓冲大小
table_open_cache = 1024 #table高速缓存的数量
sort_buffer_size = 12M #每个connection（session）第一次需要使用这个buffer的时候，一次性分配设置的内存
read_buffer_size = 8M #顺序读取数据缓冲区使用内存
#sort_buffer_size = 32M
#read_buffer_size = 32M
read_rnd_buffer_size = 32M #随机读取数据缓冲区使用内存
myisam_sort_buffer_size = 32M #MyISAM表发生变化时重新排序所需的缓冲
thread_cache_size = 120 #重新利用保存在缓存中线程的数量
query_cache_size = 64M
join_buffer_size = 8M #Join操作使用内存
bulk_insert_buffer_size = 32M #批量插入数据缓存大小
delay_key_write=ON #在表关闭之前，将对表的update操作指跟新数据到磁盘，而不更新索引到磁盘，把对索引的更改记录在内存。这样MyISAM表可以使索引更新更快。在关闭表的时候一起更新索引到磁盘
delayed_insert_limit=4000
delayed_insert_timeout=600
delayed_queue_size=4000
# Try number of CPU's*2 for thread_concurrency
# The variable only affects Solaris!
thread_concurrency = 64 #CPU核数 * 2
max_connections=1500 #最大连接（用户）数。每个连接MySQL的用户均算作一个连接
max_connect_errors=30 #最大失败连接限制
interactive_timeout=600 #服务器关闭交互式连接前等待活动的秒数
wait_timeout=3600 #服务器关闭非交互连接之前等待活动的秒数
slow_query_log #慢查询记录日志
long_query_time = 0.1 #慢查询记录时间 0.1秒
slow_query_log_file=/opt/local/mysql/logs/slow_query.log #慢查询日志路径
#log_slow_verbosity=full
log_slow_verbosity=query_plan #
# Replication Master Server (default)
# binary logging is required for replication
log-bin=/opt/local/mysql/binlog/mysql-bin #binlog 名称
log-slave-updates #从master取得并执行的二进制日志写入自己的二进制日志文件中
replicate-ignore-db=mysql #不同步的表
# binary logging format - mixed recommended
binlog_format=row #binlog 格式 分别为 row=行格式 丶 mixed=混合格式 丶 STATEMENT=SQL语句复制模式
event_scheduler=1 #计划任务 事件调度器
# required unique id between 1 and 2^32 - 1
# defaults to 1 if master-host is not set
# but will not function as a master if omitted
server-id= 1 #
# Point the following paths to different dedicated disks
#tmpdir= /tmp/
#log-update = /path-to-dedicated-directory/hostname
# Uncomment the following if you are using InnoDB tables
#innodb_data_home_dir = /data/mysql-5.1.48/mysql-data/
#innodb_data_file_path = ibdata1:2000M;ibdata2:10M:autoextend
#innodb_log_group_home_dir = /data/mysql-5.1.48/mysql-data/
# You can set .._buffer_pool_size up to 50 - 80 %
# of RAM but beware of setting memory usage too high
innodb_file_format=barracuda
innodb_file_format_max=barracuda
innodb_file_per_table=1
innodb_fast_shutdown=0
innodb_buffer_pool_size = 90000M
innodb_buffer_pool_instances = 4
#innodb_additional_mem_pool_size = 20M
#innodb_use_sys_malloc = 20M
# Set .._log_file_size to 25 % of buffer pool size
innodb_log_file_size = 512M
#innodb_log_buffer_size = 8M
innodb_log_files_in_group = 3
innodb_flush_log_at_trx_commit = 2
innodb_lock_wait_timeout = 3
innodb_rollback_on_timeout = on
innodb_flush_method=O_DIRECT
transaction-isolation=READ-COMMITTED
innodb_thread_concurrency=0
innodb_io_capacity=800
innodb_purge_threads=1
innodb_open_files=65535
#innodb_stats_update_need_lock=0
#innodb_flush_neighbor_pages=0
#innodb_aio_pending_ios_per_thread=256
#for binlog_format=row
innodb_autoinc_lock_mode=2
#innodb_fast_checksum = 1
innodb_read_io_threads = 8
innodb_write_io_threads = 12
innodb_stats_on_metadata = 0
#使用线程池处理连接
thread_handling=pool-of-threads
thread_pool_oversubscribe=30
thread_pool_size=64
thread_pool_idle_timeout=7200
thread_pool_max_threads=2000
#查询优化器开关
#optimizer_switch='index_condition_pushdown=on'
#optimizer_switch='mrr=on'
#optimizer_switch='mrr_sort_keys=on'
#optimizer_switch='mrr_cost_based=off'
#mrr_buffer_size=32M
#optimizer_switch='join_cache_incremental=on'
#optimizer_switch='join_cache_hashed=on'
#optimizer_switch='join_cache_bka=on'
#join_cache_level=4
#join_buffer_size=32M
#join_buffer_space_limit=32M
[mysqldump]
quick
max_allowed_packet = 16M
[mysql]
no-auto-rehash
# Remove the next comment character if you are not familiar with SQL
#safe-updates
[myisamchk]
key_buffer_size = 256M
sort_buffer_size = 256M
read_buffer = 2M
write_buffer = 2M
[isamchk]
key_buffer_size = 256M
sort_buffer_size = 256M
read_buffer = 2M
write_buffer = 2M
[mysqlhotcopy]
interactive-timeout

2 如下为256G内存64线程处理器的mariadb配置参数优化：

[client]
#password= your_password
port= 3306
socket= /tmp/mysql.sock
!includedir /opt/local/mysql/wsrep
# The MySQL server
[mysqld]
port= 3306
socket= /tmp/mysql.sock
basedir = /opt/local/mysql
datadir=/opt/local/mysql/data #数据库存放目录
relay-log=/opt/local/mysql/relaylog/s74-relay-bin
pid-file = /opt/local/mysql/mysql.pid
log-error = /opt/local/mysql/logs/mysqld.log
open_files_limit = 65535 #
#skip-locking
skip-external-locking #跳过外部锁定
back_log=3000 #暂存的连接数量
skip-name-resolve #关闭mysql的dns反查功能
memlock #将mysqld 进程锁定在内存中
lower_case_table_names = 1
#query_response_time_stats=1
#core-file
#core-file-size = unlimited
query_cache_type=1 #查询缓存 (0 = off、1 = on、2 = demand)
performance_schema=0 #收集数据库服务器性能参数
net_read_timeout=3600 #连接繁忙阶段（query）起作用
net_write_timeout=3600 #连接繁忙阶段（query）起作用
key_buffer_size = 32M #设置索引块缓存大小
max_allowed_packet = 128M #通信缓冲大小
table_open_cache = 1024 #table高速缓存的数量
sort_buffer_size = 12M #每个connection（session）第一次需要使用这个buffer的时候，一次性分配设置的内存
read_buffer_size = 8M #顺序读取数据缓冲区使用内存
#sort_buffer_size = 32M
#read_buffer_size = 32M
read_rnd_buffer_size = 32M #随机读取数据缓冲区使用内存
myisam_sort_buffer_size = 32M #MyISAM表发生变化时重新排序所需的缓冲
thread_cache_size = 120 #重新利用保存在缓存中线程的数量
query_cache_size = 64M
join_buffer_size = 8M #Join操作使用内存
bulk_insert_buffer_size = 32M #批量插入数据缓存大小
delay_key_write=ON #在表关闭之前，将对表的update操作指跟新数据到磁盘，而不更新索引到磁盘，把对索引的更改记录在内存。这样MyISAM表可以使索引更新更快。在关闭表的时候一起更新索引到磁盘
delayed_insert_limit=4000
delayed_insert_timeout=600
delayed_queue_size=4000
# Try number of CPU's*2 for thread_concurrency
# The variable only affects Solaris!
thread_concurrency = 96 #CPU核数 * 2
max_connections=1500 #最大连接（用户）数。每个连接MySQL的用户均算作一个连接
max_connect_errors=30 #最大失败连接限制
interactive_timeout=600 #服务器关闭交互式连接前等待活动的秒数
wait_timeout=3600 #服务器关闭非交互连接之前等待活动的秒数
slow_query_log #慢查询记录日志
long_query_time = 0.1 #慢查询记录时间 0.1秒
slow_query_log_file=/opt/local/mysql/logs/slow_query.log #慢查询日志路径
#log_slow_verbosity=full
log_slow_verbosity=query_plan #
# Replication Master Server (default)
# binary logging is required for replication
log-bin=/opt/local/mysql/binlog/mysql-bin #binlog 名称
log-slave-updates #从master取得并执行的二进制日志写入自己的二进制日志文件中
replicate-ignore-db=mysql #不同步的表
# binary logging format - mixed recommended
binlog_format=row #binlog 格式 分别为 row=行格式 丶 mixed=混合格式 丶 STATEMENT=SQL语句复制模式
event_scheduler=1 #计划任务 事件调度器
# required unique id between 1 and 2^32 - 1
# defaults to 1 if master-host is not set
# but will not function as a master if omitted
server-id= 1 #
# Point the following paths to different dedicated disks
#tmpdir= /tmp/
#log-update = /path-to-dedicated-directory/hostname
# Uncomment the following if you are using InnoDB tables
#innodb_data_home_dir = /data/mysql-5.1.48/mysql-data/
#innodb_data_file_path = ibdata1:2000M;ibdata2:10M:autoextend
#innodb_log_group_home_dir = /data/mysql-5.1.48/mysql-data/
# You can set .._buffer_pool_size up to 50 - 80 %
# of RAM but beware of setting memory usage too high
innodb_file_format=barracuda
innodb_file_format_max=barracuda
innodb_file_per_table=1
innodb_fast_shutdown=0
innodb_buffer_pool_size = 180000M
innodb_buffer_pool_instances = 4
#innodb_additional_mem_pool_size = 20M
#innodb_use_sys_malloc = 20M
# Set .._log_file_size to 25 % of buffer pool size
innodb_log_file_size = 512M
#innodb_log_buffer_size = 8M
innodb_log_files_in_group = 3
innodb_flush_log_at_trx_commit = 2
innodb_lock_wait_timeout = 3
innodb_rollback_on_timeout = on
innodb_flush_method=O_DIRECT
transaction-isolation=READ-COMMITTED
innodb_thread_concurrency=0
innodb_io_capacity=800
innodb_purge_threads=1
innodb_open_files=65535
#innodb_stats_update_need_lock=0
#innodb_flush_neighbor_pages=0
#innodb_aio_pending_ios_per_thread=256
#for binlog_format=row
innodb_autoinc_lock_mode=2
#innodb_fast_checksum = 1
innodb_read_io_threads = 8
innodb_write_io_threads = 12
innodb_stats_on_metadata = 0
#使用线程池处理连接
thread_handling=pool-of-threads
thread_pool_oversubscribe=30
thread_pool_size=64
thread_pool_idle_timeout=7200
thread_pool_max_threads=2000
#查询优化器开关
#optimizer_switch='index_condition_pushdown=on'
#optimizer_switch='mrr=on'
#optimizer_switch='mrr_sort_keys=on'
#optimizer_switch='mrr_cost_based=off'
#mrr_buffer_size=32M
#optimizer_switch='join_cache_incremental=on'
#optimizer_switch='join_cache_hashed=on'
#optimizer_switch='join_cache_bka=on'
#join_cache_level=4
#join_buffer_size=32M
#join_buffer_space_limit=32M
[mysqldump]
quick
max_allowed_packet = 16M
[mysql]
no-auto-rehash
# Remove the next comment character if you are not familiar with SQL
#safe-updates
[myisamchk]
key_buffer_size = 256M
sort_buffer_size = 256M
read_buffer = 2M
write_buffer = 2M
[isamchk]
key_buffer_size = 256M
sort_buffer_size = 256M
read_buffer = 2M
write_buffer = 2M
[mysqlhotcopy]
interactive-timeout

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