一、概述

作为DBA或系统运维人员在安装或配置MySQL的过程中，经常遇到mysql的配置文件参数不知如何设置？哪些参数需要设置？参数值设置为多少比较合理。下面分享一个在线生成mysql的生成器，帮你解决以上烦忧。

二、过程

2.1 填写相关配置

1、填写相关参数，点击生成。

2、填写参数说明

• CPU：CPU逻辑核数
• 内存大小：部署mysql机器内存大小
• 磁盘类型：SSD或HDD
• MYSQL版本：5.6、5.7、8.0
• 架构：单机、主从、MGR
• basedir：程序目录
• datadir：数据目录的父目录
• 监听端口：3306

2.2 生成配置文件展示

配置说明：

• CPU:4核
• 内存：16G
• 磁盘：SSD
• MYSQL版本:5.7
• 架构：单机
• base_dir:/usr/local/mysql/
• datadir:/data/mysql/data/

[mysql]
auto-rehash
socket =/tmp/mysql.sock # /tmp/mysql.sock
​
​
[mysqld]
####: for global
user =mysql # mysql
basedir =/usr/local/mysql/ # /usr/local/mysql/
datadir =/data/mysql/data/3306/ # /usr/local/mysql/data
server_id =1980 # 0
port =3306 # 3306
character_set_server =utf8 # latin1
log_bin_trust_function_creators =ON # 0
max_prepared_stmt_count =1048576 # 
log_timestamps =system # utc
socket =/tmp/mysql.sock # /tmp/mysql.sock
read_only =OFF # off
skip_name_resolve =1 # 0
auto_increment_increment =1 # 1
auto_increment_offset =1 # 1
lower_case_table_names =1 # 0
secure_file_priv = # null
open_files_limit =65536 # 1024
max_connections =512 # 151
thread_cache_size =64 # 9
table_open_cache =4000 # 2000
table_definition_cache =2000 # 1400
table_open_cache_instances =32 # 16
​
####: for binlog
binlog_format =ROW # row
log_bin =mysql-bin # off
binlog_rows_query_log_events =ON # off
log_slave_updates =ON # off
expire_logs_days =7 # 0
binlog_cache_size =96k # 65536(64k)
binlog_checksum =none # CRC32
sync_binlog =1 # 1
slave-preserve-commit-order =ON # 
​
####: for error-log
log_error =err.log # /usr/local/mysql/data/localhost.localdomain.err
​
####: for general-log
general_log =OFF # off
general_log_file =general.log # hostname.log
​
####: for slow query log
slow_query_log =ON # off
slow_query_log_file =slow.log # hostname.log
log_queries_not_using_indexes =OFF # off
long_query_time =2.0 # 10.000000
​
####: for gtid
gtid_executed_compression_period =1000 # 1000
gtid_mode =ON # off
enforce_gtid_consistency =ON # off
​
​
####: for replication
skip_slave_start =0 # 
master_info_repository =table # file
relay_log_info_repository =table # file
slave_parallel_type =logical_clock # database | LOGICAL_CLOCK
slave_parallel_workers =4 # 0
rpl_semi_sync_master_enabled =1 # 0
rpl_semi_sync_slave_enabled =1 # 0
rpl_semi_sync_master_timeout =1000 # 1000(1 second)
plugin_load_add =semisync_master.so #
plugin_load_add =semisync_slave.so #
binlog_group_commit_sync_delay =4000 # 0 4000(4ms) 
binlog_group_commit_sync_no_delay_count = 10 # 0
binlog_transaction_dependency_tracking = WRITESET # COMMIT_ORDER | WRITESET 
transaction_write_set_extraction = XXHASH64
​
​
####: for innodb
default_storage_engine =innodb # innodb
default_tmp_storage_engine =innodb # innodb
innodb_data_file_path =ibdata1:256M;ibdata2:256M:autoextend # ibdata1:12M:autoextend
innodb_temp_data_file_path =ibtmp1:64M:autoextend # ibtmp1:12M:autoextend
innodb_buffer_pool_filename =ib_buffer_pool # ib_buffer_pool
innodb_log_group_home_dir =./ # ./
innodb_log_files_in_group =8 # 2
innodb_log_file_size =128M # 50331648(48M)
innodb_file_per_table =ON # on
innodb_online_alter_log_max_size =128M # 134217728(128M)
innodb_open_files =64000 # 2000
innodb_page_size =16k # 16384(16k)
innodb_thread_concurrency =0 # 0
innodb_read_io_threads =4 # 4
innodb_write_io_threads =4 # 4
innodb_purge_threads =4 # 4(garbage collection)
innodb_page_cleaners =4 # 4(flush lru list)
innodb_print_all_deadlocks =ON # off
innodb_deadlock_detect =ON # on
innodb_lock_wait_timeout =50 # 50
innodb_spin_wait_delay =6 # 6
innodb_autoinc_lock_mode =2 # 1
innodb_flush_sync =OFF # on
innodb_io_capacity =4000 # 200
innodb_io_capacity_max =20000 # 2000
#--------Persistent Optimizer Statistics
innodb_stats_auto_recalc =ON # on
innodb_stats_persistent =ON # on
innodb_stats_persistent_sample_pages =20 # 20
innodb_buffer_pool_instances =10 # 1
innodb_adaptive_hash_index =ON # on
innodb_change_buffering =all # all
innodb_change_buffer_max_size =25 # 25
innodb_flush_neighbors =0 # 1
innodb_flush_method =O_DIRECT # 
innodb_doublewrite =ON # on
innodb_log_buffer_size =256M # 16777216(16M)
innodb_flush_log_at_timeout =1 # 1
innodb_flush_log_at_trx_commit =1 # 1
innodb_buffer_pool_size =10G # 128M
autocommit =ON # 1
#--------innodb scan resistant
innodb_old_blocks_pct =37 # 37
innodb_old_blocks_time =1000 # 1000
#--------innodb read ahead
innodb_read_ahead_threshold =56 # 56 (0..64)
innodb_random_read_ahead =off # OFF
#--------innodb buffer pool state
innodb_buffer_pool_dump_pct =50 # 25 
innodb_buffer_pool_dump_at_shutdown =ON # ON
innodb_buffer_pool_load_at_startup =ON # ON
​
​
​
​
​
#### for performance_schema
performance_schema =on # on
performance_schema_consumer_global_instrumentation =on # on
performance_schema_consumer_thread_instrumentation =on # on
performance_schema_consumer_events_stages_current =on # off
performance_schema_consumer_events_stages_history =on # off
performance_schema_consumer_events_stages_history_long =off # off
performance_schema_consumer_statements_digest =on # on
performance_schema_consumer_events_statements_current =on # on
performance_schema_consumer_events_statements_history =on # on
performance_schema_consumer_events_statements_history_long =off # off
performance_schema_consumer_events_waits_current =on # off
performance_schema_consumer_events_waits_history =on # off
performance_schema_consumer_events_waits_history_long =off # off
performance-schema-instrument ='memory/%=COUNTED'