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缘由：

这是在GitHub上看到的一个MySQL配置文件模板，觉得不错，在此记录一下，方便以后在有需要的时候进行参考（因为MySQL的参数优化是个很复杂的东西，对于不同的网站，及其在线量、访问量、帖子数量、网络情况，以及机器硬件配置都有关系，优化不可能一次性完成，需要不断的观察以及调试，才有可能得到最佳效果）。

如果觉得这个配置文件太复杂了，也可以考虑按需使用安装时自带的一些配置文件：

/usr/share/mysql/my-large.cnf
/usr/share/mysql/my-huge.cnf
/usr/share/mysql/my-innodb-heavy-4G.cnf
/usr/share/mysql/my-medium.cnf
/usr/share/mysql/my-small.cnf

正文：

# author: [email protected]
# This configration file opts for MySQL 5.6 and 5.7.
# assume: 32 CPU core / 256G Memory / SSD storage with 20000 IOPS in 16K page size

[mysql]
prompt = [\\u@\\h][\\d]>\\_

[mysqld]
# basic settings #
user = mysql
sql_mode = "STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION,NO_ZERO_DATE,NO_ZERO_IN_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER"
autocommit = 1
character_set_server=utf8mb4
transaction_isolation = READ-COMMITTED
explicit_defaults_for_timestamp = 1
max_allowed_packet = 16777216
event_scheduler = 1

# connection #
interactive_timeout = 1800
wait_timeout = 1800
lock_wait_timeout = 1800
skip_name_resolve = 1
max_connections = 512
max_connect_errors = 1000000

# session memory setting #
read_buffer_size = 16777216
read_rnd_buffer_size = 33554432
sort_buffer_size = 33554432
tmp_table_size = 67108864
join_buffer_size = 134217728

# log settings #
log_error = error.log
slow_query_log = 1
slow_query_log_file = slow.log
log_queries_not_using_indexes = 1
log_slow_admin_statements = 1
log_slow_slave_statements = 1
log_throttle_queries_not_using_indexes = 10
expire_logs_days = 90
long_query_time = 2
min_examined_row_limit = 100
binlog-rows-query-log-events = 1
log-bin-trust-function-creators = 1
expire-logs-days = 90
log-slave-updates = 1

# innodb settings #
innodb_page_size = 16384
innodb_buffer_pool_size = 160G
innodb_buffer_pool_instances = 16
innodb_buffer_pool_load_at_startup = 1
innodb_buffer_pool_dump_at_shutdown = 1
innodb_lru_scan_depth = 4096
innodb_lock_wait_timeout = 5
innodb_io_capacity = 10000
innodb_io_capacity_max = 20000
innodb_flush_method = O_DIRECT
innodb_file_format = Barracuda
innodb_file_format_max = Barracuda
innodb_undo_logs = 128
innodb_undo_tablespaces = 3
innodb_flush_neighbors = 0
innodb_log_file_size = 17179869184
innodb_log_files_in_group = 2
innodb_log_buffer_size = 16777216
innodb_purge_threads = 4
innodb_large_prefix = 1
innodb_thread_concurrency = 64
innodb_print_all_deadlocks = 1
innodb_strict_mode = 1
innodb_sort_buffer_size = 67108864
innodb_write_io_threads = 16
innodb_read_io_threads = 16
innodb_file_per_table = 1
innodb_stats_persistent_sample_pages = 64
innodb_autoinc_lock_mode = 2

# replication setting #
master_info_repository = TABLE
relay_log_info_repository = TABLE
sync_binlog = 1
gtid_mode = on
enforce_gtid_consistency = 1
log_slave_updates
binlog_format = ROW
binlog_rows_query_log_events = 1
relay_log = relay.log
relay_log_recovery = 1
binlog_gtid_simple_recovery = 1
slave_skip_errors = ddl_exist_errors
slave-rows-search-algorithms = 'INDEX_SCAN,HASH_SCAN'

# semi sync replication settings #
plugin_load = "validate_password.so;rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so"
rpl_semi_sync_master_enabled = 1
rpl_semi_sync_master_timeout = 3000
rpl_semi_sync_slave_enabled = 1

# password plugin #
validate_password_policy=STRONG
validate-password=FORCE_PLUS_PERMANENT

[mysqld-5.7]
# new innodb setting #
loose_innodb_numa_interleave=1
innodb_buffer_pool_dump_pct = 40
innodb_page_cleaners = 16
innodb_undo_log_truncate = 1
innodb_max_undo_log_size = 2G
innodb_purge_rseg_truncate_frequency = 128
# new replication setting #
slave-parallel-type = LOGICAL_CLOCK
slave-parallel-workers = 16
slave_preserve_commit_order=1
slave_transaction_retries=128
# other change setting #
binlog_gtid_simple_recovery=1
log_timestamps=system
show_compatibility_56=on

参考链接：

• https://github.com/jdaaaaaavid/mysql_best_configuration/blob/master/my.cnf
• mysql用于分配内存的参数
• MySQL配置文件my.cnf中文详解附mysql性能优化方法分享
• MySQL配置文件my.cnf参数优化和中文详解
• Mysql my.cnf配置
• Mysql 配置文件详解

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