- # basic settings
- # connection
- # table cache performance settings
- # session memory settings
- # log settings
- # innodb settings
- # replication settings
- # semi sync replication settings
- [mysqld57]
- ">控制 半同步复制 还是 无损复制 的参数
# - AFTER_SYNC 表示的是无损复制；（5.7 默认）
# - AFTER_COMMIT 表示的是半同步复制；（5.6默认）
rpl_semi_sync_master_wait_point=AFTER_SYNC
# 至少收到 1 个 slave发回的ack
rpl_semi_sync_master_wait_for_slave_count=1
- # password plugin
- [mysqld-5.6]
- metalock performance settings
metadata_locks_hash_instances=64 - [mysqld-5.7]
- new innodb settings #
loose_innodb_numa_interleave=1
innodb_buffer_pool_dump_pct = 40 #预热百分比
innodb_page_cleaners = 16
innodb_undo_log_truncate = 1
innodb_max_undo_log_size = 2G
innodb_purge_rseg_truncate_frequency = 128
innodb_adaptive_hash_index = off #建议关闭自适应hash。
# new replication settings #
slave-parallel-type = LOGICAL_CLOCK
slave-parallel-workers = 16
slave_preserve_commit_order=1
slave_transaction_retries=128
# other change settings #
binlog_gtid_simple_recovery=1
log_timestamps=system
show_compatibility_56=on - 优化总结
- 姜承尧老师推荐生产环境Mysql my.ini my.cnf配置_mpren的专栏-CSDN博客
- 【阿里云参数调优】参数调优建议 - 云数据库 RDS - 阿里云
- mysql_best_configuration/my.cnf at master · jdaaaaaavid/mysql_best_configuration
[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 #配合binlog_format = ROW
explicit_defaults_for_timestamp = 1
max_allowed_packet = 16777216
event_scheduler = 1
# connection
interactive_timeout = 1800
wait_timeout = 1800 #默认8小时
lock_wait_timeout = 1800
skip_name_resolve = 1
max_connections = 512 #默认151
max_connect_errors = 1000000
# table cache performance settings
table_open_cache = 4096
table_definition_cache = 4096
table_open_cache_instances = 128
# session memory settings
read_buffer_size = 16M
read_rnd_buffer_size = 32M
sort_buffer_size = 32M #如果Sort_merge_passes比较大，则调大
tmp_table_size = 64M
join_buffer_size = 128M
thread_cache_size = 64
# log settings
log_error = error.log
slow_query_log = 1 # log_output：TABLE|FILE|NONE 将general_log和slow log存入表中。
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 #机器内存的60%~70%
- 根据status判断
innodb_buffer_pool_instances = 16 #默认值8，设置为cpu个数，设置多个buffer pool 减小了锁粒度
innodb_buffer_pool_load_at_startup = 1
innodb_buffer_pool_dump_at_shutdown = 1 #bufferpool预热
innodb_lru_scan_depth = 4096
innodb_lock_wait_timeout = 5
innodb_io_capacity = 10000 # 数据库写盘可以使用的iops，别用的ssd却参数设置很低，需要基准测试。默认200，一般读写比例1:1，调为iops一半
innodb_io_capacity_max = 20000
innodb_flush_method = O_DIRECT #写入直接写盘，不会写os cache。mysql不需要os cache。
innodb_file_format = Barracuda
innodb_file_format_max = Barracuda
innodb_undo_logs = 128
innodb_undo_tablespaces = 3
innodb_flush_neighbors = 0 # 由于SSD设备的普及，MySQL 8.0 将该参数的默认值由1调整为0。ssd不存在顺序读写，机械盘也设置为0，因为效果不好。
innodb_log_file_size = 17179869184 #这是2G
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#建议是innodb_autoinc_lock_mode=2配合binlog_format=row【主主复制=2会造成序列值不连续】
innodb_online_alter_log_max_size=1G #当online_alter的时候，会将insert,update,delete的数据存在log中，log有个上限就是这个参数；如果alter花费了1小时，而在这1小时内的数据变更超过500M，那么就会失败；
innodb_open_files=4096
# replication settings
master_info_repository = TABLE #有两个值，分别是file和table，该参数决定了slave记录master的状态，如果参数是file，就会创建master.info文件，如果参数值是table，就在mysql中创建slave_master_info的表。
relay_log_info_repository = TABLE # 为了relay log进度和数据库写入进度一致在mysql.slave_relay_log_info表中
sync_binlog = 1
gtid_mode = on
enforce_gtid_consistency = 1
log_slave_updates #级联复制
binlog_format = ROW
binlog_rows_query_log_events = 1
relay_log = relay.log
relay_log_recovery = 1 #为了io thread进度和relay log一致
relay_log_purge=1（默认） #MySQL relay_log_purge=0 时的风险 - yuyue2014 - 博客园
slave_skip_errors = ddl_exist_errors
slave-rows-search-algorithms = ‘INDEX_SCAN,HASH_SCAN’
skip-slave-start=1 #不会自动的启动slave start（不自动启动复制）
# 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_master_timeout设置很大就永远不会切异步
rpl_semi_sync_slave_enabled = 1
[mysqld57]
控制 半同步复制 还是 无损复制 的参数
# - AFTER_SYNC 表示的是无损复制；（5.7 默认）
# - AFTER_COMMIT 表示的是半同步复制；（5.6默认）
rpl_semi_sync_master_wait_point=AFTER_SYNC
# 至少收到 1 个 slave发回的ack
rpl_semi_sync_master_wait_for_slave_count=1
# password plugin
validate_password_policy=STRONG
validate-password=FORCE_PLUS_PERMANENT
[mysqld-5.6]
metalock performance settings
metadata_locks_hash_instances=64
[mysqld-5.7]
new innodb settings #
loose_innodb_numa_interleave=1
innodb_buffer_pool_dump_pct = 40 #预热百分比
innodb_page_cleaners = 16
innodb_undo_log_truncate = 1
innodb_max_undo_log_size = 2G
innodb_purge_rseg_truncate_frequency = 128
innodb_adaptive_hash_index = off #建议关闭自适应hash。
# new replication settings #
slave-parallel-type = LOGICAL_CLOCK
slave-parallel-workers = 16
slave_preserve_commit_order=1
slave_transaction_retries=128
# other change settings #
binlog_gtid_simple_recovery=1
log_timestamps=system
show_compatibility_56=on
优化总结
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