mariadb數據庫優化需要根據自己業務需求以及根據硬件配置來進行參數優化，下面是一些關于mariadb數據庫參數優化的配置文件。 如下為128G內存32線程處理器的MySQL/MariaDB配置參數優化：

[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                   #數據庫存放目錄
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                           #跳過外部鎖定
back_log=3000                                   #暫存的連接數量  
skip-name-resolve                               #關閉mysql的dns反查功能
memlock                                         #將mysqld 進程鎖定在內存中
lower_case_table_names = 1
#query_response_time_stats=1
#core-file
#core-file-size = unlimited
query_cache_type=1                              #查詢緩存  (0 = off、1 = on、2 = demand)
performance_schema=0                            #收集數據庫服務器性能參數
net_read_timeout=3600                           #連接繁忙階段（query）起作用
net_write_timeout=3600                          #連接繁忙階段（query）起作用
key_buffer_size = 32M                           #設置索引塊緩存大小
max_allowed_packet = 128M                       #通信緩沖大小
table_open_cache = 1024                         #table高速緩存的數量
sort_buffer_size = 12M                          #每個connection（session）第一次需要使用這個buffer的時候，一次性分配設置的內存
read_buffer_size = 8M                           #順序讀取數據緩沖區使用內存
#sort_buffer_size = 32M
#read_buffer_size = 32M
read_rnd_buffer_size = 32M                      #隨機讀取數據緩沖區使用內存
myisam_sort_buffer_size = 32M                   #MyISAM表發生變化時重新排序所需的緩沖
thread_cache_size = 120                         #重新利用保存在緩存中線程的數量
query_cache_size = 64M
join_buffer_size = 8M                           #Join操作使用內存
bulk_insert_buffer_size = 32M                   #批量插入數據緩存大小
delay_key_write=ON                              #在表關閉之前，將對表的update操作指跟新數據到磁盤，而不更新索引到磁盤，把對索引的更改記錄在內存。這樣MyISAM表可以使索引更新更快。在關閉表的時候一起更新索引到磁盤
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核數 * 2
max_connections=1500                            #最大連接（用戶）數。每個連接MySQL的用戶均算作一個連接
max_connect_errors=30                           #最大失敗連接限制
interactive_timeout=600                         #服務器關閉交互式連接前等待活動的秒數
wait_timeout=3600                               #服務器關閉非交互連接之前等待活動的秒數
slow_query_log                                  #慢查詢記錄日志
long_query_time = 0.1                           #慢查詢記錄時間  0.1秒
slow_query_log_file=/opt/local/mysql/logs/slow_query.log            #慢查詢日志路徑
#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 名稱
log-slave-updates                               #從master取得并執行的二進制日志寫入自己的二進制日志文件中
replicate-ignore-db=mysql                       #不同步的表
# binary logging format - mixed recommended
binlog_format=row                               #binlog 格式 分別為 row=行格式 丶 mixed=混合格式 丶 STATEMENT=SQL語句復制模式
event_scheduler=1                               #計劃任務 事件調度器
# 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
#使用線程池處理連接
thread_handling=pool-of-threads
thread_pool_oversubscribe=30
thread_pool_size=64
thread_pool_idle_timeout=7200
thread_pool_max_threads=2000
#查詢優化器開關
#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

[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                   #數據庫存放目錄
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                           #跳過外部鎖定
back_log=3000                                   #暫存的連接數量  
skip-name-resolve                               #關閉mysql的dns反查功能
memlock                                         #將mysqld 進程鎖定在內存中
lower_case_table_names = 1
#query_response_time_stats=1
#core-file
#core-file-size = unlimited
query_cache_type=1                              #查詢緩存  (0 = off、1 = on、2 = demand)
performance_schema=0                            #收集數據庫服務器性能參數
net_read_timeout=3600                           #連接繁忙階段（query）起作用
net_write_timeout=3600                          #連接繁忙階段（query）起作用
key_buffer_size = 32M                           #設置索引塊緩存大小
max_allowed_packet = 128M                       #通信緩沖大小
table_open_cache = 1024                         #table高速緩存的數量
sort_buffer_size = 12M                          #每個connection（session）第一次需要使用這個buffer的時候，一次性分配設置的內存
read_buffer_size = 8M                           #順序讀取數據緩沖區使用內存
#sort_buffer_size = 32M
#read_buffer_size = 32M
read_rnd_buffer_size = 32M                      #隨機讀取數據緩沖區使用內存
myisam_sort_buffer_size = 32M                   #MyISAM表發生變化時重新排序所需的緩沖
thread_cache_size = 120                         #重新利用保存在緩存中線程的數量
query_cache_size = 64M
join_buffer_size = 8M                           #Join操作使用內存
bulk_insert_buffer_size = 32M                   #批量插入數據緩存大小
delay_key_write=ON                              #在表關閉之前，將對表的update操作指跟新數據到磁盤，而不更新索引到磁盤，把對索引的更改記錄在內存。這樣MyISAM表可以使索引更新更快。在關閉表的時候一起更新索引到磁盤
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核數 * 2
max_connections=1500                            #最大連接（用戶）數。每個連接MySQL的用戶均算作一個連接
max_connect_errors=30                           #最大失敗連接限制
interactive_timeout=600                         #服務器關閉交互式連接前等待活動的秒數
wait_timeout=3600                               #服務器關閉非交互連接之前等待活動的秒數
slow_query_log                                  #慢查詢記錄日志
long_query_time = 0.1                           #慢查詢記錄時間  0.1秒
slow_query_log_file=/opt/local/mysql/logs/slow_query.log            #慢查詢日志路徑
#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 名稱
log-slave-updates                               #從master取得并執行的二進制日志寫入自己的二進制日志文件中
replicate-ignore-db=mysql                       #不同步的表
# binary logging format - mixed recommended
binlog_format=row                               #binlog 格式 分別為 row=行格式 丶 mixed=混合格式 丶 STATEMENT=SQL語句復制模式
event_scheduler=1                               #計劃任務 事件調度器
# 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
#使用線程池處理連接
thread_handling=pool-of-threads
thread_pool_oversubscribe=30
thread_pool_size=64
thread_pool_idle_timeout=7200
thread_pool_max_threads=2000
#查詢優化器開關
#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