GreatSQL(/MySQL)的配置文件模板样例

Posted 2022-09-05 bisal(Chen Liu)

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刚接触到mysql的时候，印象最深的就是他的配置文件my.cnf，作为初学者，像[client]、[mysql]、[mysqld]中往往就只配置一些简单的，参数很多，除了一些基础的，其他的可能就需要积累了。但是线上的生产数据库，DBA们很可能会根据实际的机器配置、应用需求和特性，通过调整my.cnf中的配置项，达到他们的目的。

叶大师在微信群中推荐了一个GreatSQL标准的配置文件，我们可以借鉴下，针对我们的实际需求，适当剪裁，形成自己的模板。

https://gitee.com/GreatSQL/GreatSQL-Doc/blob/master/docs/my.cnf-example-greatsql-8.0.25-16

#
# my.cnf example for GreatSQL
# last update, 2021/8/20
#
# 下面参数选项设置仅作为参考，且假设服务器可用内存为256G
#
[client]
socket    = /data/GreatSQL/mysql.sock
[mysql]
loose-skip-binary-as-hex
prompt="(\\\\D)[\\\\u@GreatSQL][\\\\d]>"
no-auto-rehash
[mysqld]
user    = mysql
port    = 3306
server_id = 3306
basedir = /usr/
datadir    = /data/GreatSQL
socket    = /data/GreatSQL/mysql.sock
pid-file = mysql.pid
character-set-server = UTF8MB4
skip_name_resolve = 1
#若你的MySQL数据库主要运行在境外，请务必根据实际情况调整本参数
default_time_zone = "+8:00"


#performance setttings
lock_wait_timeout = 3600
open_files_limit    = 65535
back_log = 1024
max_connections = 1024
max_connect_errors = 1000000
table_open_cache = 2048
table_definition_cache = 2048
thread_stack = 512K
sort_buffer_size = 4M
join_buffer_size = 4M
read_buffer_size = 8M
read_rnd_buffer_size = 4M
bulk_insert_buffer_size = 64M
thread_cache_size = 768
interactive_timeout = 600
wait_timeout = 600
tmp_table_size = 96M
max_heap_table_size = 96M


#log settings
log_timestamps = SYSTEM
log_error = /data/GreatSQL/error.log
log_error_verbosity = 3
slow_query_log = 1
log_slow_extra = 1
slow_query_log_file = /data/GreatSQL/slow.log
long_query_time = 0.01
log_queries_not_using_indexes = 1
log_throttle_queries_not_using_indexes = 60
min_examined_row_limit = 0
log_slow_admin_statements = 1
log_slow_slave_statements = 1
log_slow_verbosity = FULL
log_bin = /data/GreatSQL/binlog
binlog_format = ROW
sync_binlog = 1
binlog_cache_size = 4M
max_binlog_cache_size = 6G
max_binlog_size = 1G
binlog_rows_query_log_events = 1
binlog_expire_logs_seconds = 604800
binlog_checksum = CRC32
gtid_mode = ON
enforce_gtid_consistency = TRUE


#myisam settings
key_buffer_size = 32M
myisam_sort_buffer_size = 128M


#replication settings
relay_log_recovery = 1
slave_parallel_type = LOGICAL_CLOCK
#并行复制线程数可以设置为逻辑CPU数量的2倍
slave_parallel_workers = 64
binlog_transaction_dependency_tracking = WRITESET
slave_preserve_commit_order = 1
slave_checkpoint_period = 2


#启用InnoDB并行查询优化功能
loose-force_parallel_execute = OFF
#设置每个SQL语句的并行查询最大并发度
loose-parallel_default_dop = 8
#设置系统中总的并行查询线程数，可以和最大逻辑CPU数量一样
loose-parallel_max_threads = 64
#并行执行时leader线程和worker线程使用的总内存大小上限，可以设置物理内存的5-10%左右
loose-parallel_memory_limit = 12G


#mgr settings
loose-plugin_load_add = 'mysql_clone.so'
loose-plugin_load_add = 'group_replication.so'
loose-group_replication_group_name = "aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaa1"
#MGR本地节点IP:PORT，请自行替换
loose-group_replication_local_address = "172.16.16.10:33061"
#MGR集群所有节点IP:PORT，请自行替换
loose-group_replication_group_seeds = '172.16.16.10:33061,72.16.16.12:33061,72.16.16.12:33061'
loose-group_replication_start_on_boot = ON
loose-group_replication_bootstrap_group = OFF
loose-group_replication_exit_state_action = READ_ONLY
loose-group_replication_flow_control_mode = "DISABLED"
loose-group_replication_single_primary_mode = ON
loose-group_replication_majority_after_mode = ON
loose-group_replication_communication_max_message_size = 10M
loose-group_replication_arbitrator = 0
loose-group_replication_single_primary_fast_mode = 1
loose-group_replication_request_time_threshold = 100
loose-group_replication_primary_election_mode = GTID_FIRST
loose-group_replication_unreachable_majority_timeout = 30
loose-group_replication_member_expel_timeout = 5
loose-group_replication_autorejoin_tries = 288
report_host = "172.16.16.10"


#innodb settings
innodb_buffer_pool_size = 16G
innodb_buffer_pool_instances = 8
innodb_data_file_path = ibdata1:12M:autoextend
innodb_flush_log_at_trx_commit = 1
innodb_log_buffer_size = 32M
innodb_log_file_size = 2G
innodb_log_files_in_group = 3
innodb_doublewrite_files = 2
innodb_max_undo_log_size = 4G
# 根据您的服务器IOPS能力适当调整
# 一般配普通SSD盘的话，可以调整到 10000 - 20000
# 配置高端PCIe SSD卡的话，则可以调整的更高，比如 50000 - 80000
innodb_io_capacity = 4000
innodb_io_capacity_max = 8000
innodb_open_files = 65534
innodb_flush_method = O_DIRECT
innodb_lru_scan_depth = 4000
innodb_lock_wait_timeout = 10
innodb_rollback_on_timeout = 1
innodb_print_all_deadlocks = 1
innodb_online_alter_log_max_size = 4G
innodb_print_ddl_logs = 1
innodb_status_file = 1
innodb_status_output = 0
innodb_status_output_locks = 1
innodb_sort_buffer_size = 64M


#innodb monitor settings
innodb_monitor_enable = "module_innodb"
innodb_monitor_enable = "module_server"
innodb_monitor_enable = "module_dml"
innodb_monitor_enable = "module_ddl"
innodb_monitor_enable = "module_trx"
innodb_monitor_enable = "module_os"
innodb_monitor_enable = "module_purge"
innodb_monitor_enable = "module_log"
innodb_monitor_enable = "module_lock"
innodb_monitor_enable = "module_buffer"
innodb_monitor_enable = "module_index"
innodb_monitor_enable = "module_ibuf_system"
innodb_monitor_enable = "module_buffer_page"
innodb_monitor_enable = "module_adaptive_hash"


#pfs settings
performance_schema = 1
#performance_schema_instrument = '%memory%=on'
performance_schema_instrument = '%lock%=on'

叶大师特意在自己的博客中给了一个[client]的配置，

https://imysql.com/2008_07_09_show_mysql_client_settings

[client]
port=3306
socket=/tmp/mysql.sock
[mysql]
prompt="(\\\\u:db1@yejr.com:\\R:\\m:\\\\s)[\\\\d]> "
pager="less -i -n -S"
tee="/tmp/query.log"
no-auto-rehash

通过prompt，能很方便地知道当前位于哪个MySQL DB上，正在以哪个用户名登录，对哪个数据库进行操作，防止误操作，并且还能显示当前时间。

tee="/tmp/query.log"是将每次查询的SQL及其结果都记录到 /tmp/query.log 里，便于追踪。

pager="less -i -n -S" 则是将每次输出都用less来控制显示，便于输出结果格式更加容易阅读，尤其是行记录长度超过一屏宽度时。

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