总共有两份配置文件，第一份来自网上，第二份是自己的。
第一份如下：
用户只需根据自己的服务器配置稍作修改即可，如InnoDB缓冲池的大小、IO能力（innodb_buffer_pool_size，innodb_io_capacity)。特别注意，这份配置文件不用修改，可以直接运行在MySQL 5.6和5.7的版本下，这里使用了小小的技巧，具体可看配置文件
[client] user=david password=88888888 [mysqld] ########basic settings######## server-id = 11 port = 3306 user = mysql bind_address = 10.166.224.32 autocommit = 0 character_set_server=utf8mb4 skip_name_resolve = 1 max_connections = 800 max_connect_errors = 1000 datadir = /data/mysql_data transaction_isolation = READ-COMMITTED explicit_defaults_for_timestamp = 1 join_buffer_size = 134217728 tmp_table_size = 67108864 tmpdir = /tmp max_allowed_packet = 16777216 sql_mode = "STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION,NO_ZERO_DATE,NO_ZERO_IN_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER" interactive_timeout = 1800 wait_timeout = 1800 read_buffer_size = 16777216 read_rnd_buffer_size = 33554432 sort_buffer_size = 33554432 ########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 ########replication settings######## master_info_repository = TABLE relay_log_info_repository = TABLE log_bin = bin.log sync_binlog = 1 gtid_mode = on enforce_gtid_consistency = 1 log_slave_updates binlog_format = row relay_log = relay.log relay_log_recovery = 1 binlog_gtid_simple_recovery = 1 slave_skip_errors = ddl_exist_errors ########innodb settings######## innodb_page_size = 8192 innodb_buffer_pool_size = 6G innodb_buffer_pool_instances = 8 innodb_buffer_pool_load_at_startup = 1 innodb_buffer_pool_dump_at_shutdown = 1 innodb_lru_scan_depth = 2000 innodb_lock_wait_timeout = 5 innodb_io_capacity = 4000 innodb_io_capacity_max = 8000 innodb_flush_method = O_DIRECT innodb_file_format = Barracuda innodb_file_format_max = Barracuda innodb_log_group_home_dir = /redolog/ innodb_undo_directory = /undolog/ innodb_undo_logs = 128 innodb_undo_tablespaces = 3 innodb_flush_neighbors = 0 innodb_log_file_size = 4G 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 ########semi sync replication settings######## plugin_dir=/usr/local/mysql/lib/plugin plugin_load = "rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so" loose_rpl_semi_sync_master_enabled = 1 loose_rpl_semi_sync_slave_enabled = 1 loose_rpl_semi_sync_master_timeout = 5000 [mysqld-5.7] innodb_buffer_pool_dump_pct = 40 innodb_page_cleaners = 4 innodb_undo_log_truncate = 1 innodb_max_undo_log_size = 2G innodb_purge_rseg_truncate_frequency = 128 binlog_gtid_simple_recovery=1 log_timestamps=system transaction_write_set_extraction=MURMUR32 show_compatibility_56=on
第二份如下：看了一下第一份设置的内存很大，所以一般的机器不要用，否则启动的时候就死机了。
根据自己机器的内存大小来调整相关buffer的大小，以下是我的配置文件，大部分注释，根据需要进行修改，myisam部分可以不用了，因为现在基本使用innodb引擎。
[root@localhost data]# cat /etc/my.cnf [client] port = 3306 socket =/application/mysql/tmp/mysql.sock default-character-set = utf8 [mysql] no-auto-rehash [mysqld] user = mysql port = 3306 character-set-server = utf8 socket = /application/mysql/tmp/mysql.sock basedir = /application/mysql datadir = /application/mysql/data log-error = /application/mysql/data/mysql_err.log pid-file = /application/mysql/data/mysql.pid #bulk_insert_buffer_size = 64M #myisam_sort_buffer_size = 64M #myisam_max_sort_file_size = 10G #myisam_repair_threads = 1 #myisam_recover long_query_time = 2 slow_query_log slow_query_log_file = /application/mysql/data/slow.log skip-name-resolv #skip-locking #skip-networking server-id = 1 #bin log configure options by clc #log_slave_updates = 1 #log-bin = /application/mysql/data/mysql-bin #binlog_format = mixed #binlog_cache_size = 4M #max_binlog_cache_size = 8M #max_binlog_size = 1G #expire_logs_days = 90 #binlog-ignore - db = mysql #binlog-ignore - db = information_schema #sort_buffer_size = 2M #system default #join_buffer_size = 2M #system default #thread_cache_size = 38 #system default #key_buffer_size = 64M #ram is 4GB ,can set 256M #read_buffer_size = 128k #system default #bulk_insert_buffer_size = 8M #system default #read_rnd_buffer_size = 16M #query_cache_size = 32M #query_cache_limit = 2M #query_cache_min_res_unit = 2k #thread_concurrency = 32 #table_cache = 614 #table_open_cache = 512 #open_files_limit = 10240 #back_log = 600 #max_connections = 5000 #max_connect_errors = 6000 #external-locking = FALSE #max_allowed_packet = 16M #thread_stack = 192K #transaction_isolation = READ-COMMITTED #tmp_table_size = 256M #max_heap_table_size = 512M #innodb engine configure #innodb_additional_mem_pool_size = 16M #innodb_buffer_pool_size = 512M #innodb_data_file_path = ibdata1:256M:autoextend #innodb_file_io_threads = 4 #innodb_thread_concurrency = 8 #innodb_flush_log_at_trx_commit = 2 #innodb_log_buffer_size = 16M #innodb_log_file_size = 128M #innodb_log_files_in_group = 3 #innodb_max_dirty_pages_pct = 90 #innodb_lock_wait_timeout = 120 #innodb_file_per_table = 0 [mysqldump] quick max_allowed_packet = 64M [mysqld_safe] log-error = /application/mysql/data/mysql_err.log pid-file = /application/mysql/data/mysql.pid sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
原文链接：mysql5.6/5.7配置文件，转载请注明来源！