MariaDB Configuration

[mysqld]

#skip-innodb
#skip-federated
#skip-pbxt
#skip-pbxt_statistics
#skip-archive
#skip-name-resolve
#old_passwords
back_log = 75
max_connections = 300
key_buffer_size = 32M
myisam_sort_buffer_size = 32M
myisam_max_sort_file_size = 2048M
join_buffer_size = 64K
read_buffer_size = 64K
sort_buffer_size = 128K
table_definition_cache = 4096
table_open_cache = 2048
thread_cache_size = 64
wait_timeout = 120
connect_timeout = 10
tmp_table_size = 32M
max_heap_table_size = 32M
max_allowed_packet = 32M
max_seeks_for_key = 1000
group_concat_max_len = 1024
max_length_for_sort_data = 1024
net_buffer_length = 16384
max_connect_errors = 100000
concurrent_insert = 2
read_rnd_buffer_size = 256K
bulk_insert_buffer_size = 8M
query_cache_limit = 512K
query_cache_size = 16M
query_cache_type = 1
query_cache_min_res_unit = 2K
query_prealloc_size = 262144
query_alloc_block_size = 65536
transaction_alloc_block_size = 8192
transaction_prealloc_size = 4096
default-storage-engine = InnoDB

log_warnings=1
slow_query_log=0
long_query_time=2
slow_query_log_file=/var/log/mariadb/mariadb-slow.log

# innodb settings
#innodb_extra_rsegments = 4
innodb_purge_threads=1
innodb_doublewrite = 1

innodb_file_per_table = 1
innodb_open_files = 1000
innodb_data_file_path= ibdata1:10M:autoextend
innodb_buffer_pool_size = 4G

innodb_log_files_in_group = 2
innodb_log_file_size = 512M
innodb_log_buffer_size = 64M
innodb_flush_log_at_trx_commit = 2
innodb_thread_concurrency = 0
innodb_lock_wait_timeout=50
#innodb_flush_method = O_DIRECT

# 200 * # DISKS
innodb_io_capacity = 100
innodb_read_io_threads = 2
innodb_write_io_threads = 2

#timeouts
interactive_timeout = 86400
wait_timeout = 86400

# mariadb settings
[mariadb]
#thread-handling = pool-of-threads
#thread-pool-size= 20
#mysql --port=3307 --protocol=tcp
#extra-port=3307
#extra-max-connections=1

userstat = 0
key_cache_segments = 1
aria_group_commit = none
aria_group_commit_interval = 0
aria_log_file_size = 32M
aria_log_purge_type = immediate
aria_pagecache_buffer_size = 8M
aria_sort_buffer_size = 8M

[mariadb-5.5]
#ignore_db_dirs=
query_cache_strip_comments=0

innodb_read_ahead = linear
innodb_adaptive_flushing_method = estimate
innodb_flush_neighbor_pages = 1
innodb_stats_update_need_lock = 0
innodb_log_block_size = 512

log_slow_filter =admin,filesort,filesort_on_disk,full_join,full_scan,query_cache,query_cache_miss,tmp_table,tmp_table_on_disk

[mysqld_safe]
#log-error=/var/log/mysqld.log
#nice = -5
open-files-limit = 8192

[mysqldump]
quick
max_allowed_packet = 32M

[myisamchk]
key_buffer = 32M
sort_buffer = 16M
read_buffer = 16M
write_buffer = 16M

[mysqlhotcopy]
interactive-timeout

[mariadb-10.0]
performance_schema=OFF
innodb_stats_on_metadata=OFF
innodb_sort_buffer_size=2M
innodb_online_alter_log_max_size=128M
query_cache_strip_comments=0
log_slow_filter =admin,filesort,filesort_on_disk,full_join,full_scan,query_cache,query_cache_miss,tmp_table,tmp_table_on_disk

[mariadb-10.1]
innodb_file_format = Barracuda
innodb_file_per_table = 1

innodb_buffer_pool_dump_at_shutdown=1
innodb_buffer_pool_load_at_startup=1
innodb_buffer_pool_populate=0

innodb_defragment=1
innodb_defragment_n_pages=7
innodb_defragment_stats_accuracy=0
innodb_defragment_fill_factor_n_recs=20
innodb_defragment_fill_factor=0.9
innodb_defragment_frequency=40

query_cache_size=0
query_cache_type=0
join_buffer_size=256K
tmp_table_size=16M
max_heap_table_size=16M
thread_cache_size=4
innodb_buffer_pool_size=4G
innodb_log_file_size=2G
innodb_buffer_pool_instances=16

back_log = 150
innodb-flush-neighbors = 1