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Aluhao
V2EX  ›  MySQL

MYSQL 8.0.33 8 核 64G my.cnf 配置

  •  
  •   Aluhao · 2023-11-13 11:34:43 +08:00 · 2193 次点击
    这是一个创建于 376 天前的主题,其中的信息可能已经有所发展或是发生改变。
    自建 MYSQL, 1 主 3 从,前环境使用的 my.cnf 配置文件,准备把它迁移到 AWS 去,
    innodb_io_capacity 是根据当前系统购买配置时给的参数;
    innodb_buffer_pool_size 是内存的 75%;
    innodb_redo_log_capacity 64G 内存建议 4G
    其它有些参数调整不知道是不是合理。

    [client]
    port = 3306
    socket = /tmp/mysql.sock
    [mysqld]
    user = mysql
    port = 3306
    socket = /tmp/mysql.sock
    server_id = 100
    #bind_address = 127.0.0.1
    basedir = /usr/local
    datadir = /var/db/mysql
    tmpdir = /var/db/mysql_tmpdir
    log_error = /var/db/mysql/error.log
    replica_load_tmpdir = /var/db/mysql_tmpdir
    secure_file_priv = /var/db/mysql_secure
    authentication_policy = caching_sha2_password
    explicit_defaults_for_timestamp = ON
    max_connections = 2000
    max_connect_errors = 3000
    max_allowed_packet = 512M
    gtid_mode = ON
    enforce_gtid_consistency = ON
    innodb_file_per_table = ON
    #innodb_dedicated_server = ON
    innodb_sort_buffer_size = 64M
    innodb_buffer_pool_size = 48G
    innodb_redo_log_capacity = 4G
    innodb_write_io_threads = 8
    innodb_read_io_threads = 8
    innodb_log_buffer_size = 64M
    innodb_data_home_dir = /var/db/mysql
    innodb_log_group_home_dir = /var/db/mysql
    innodb_data_file_path = ibdata1:128M:autoextend
    innodb_temp_data_file_path = ibtmp1:128M:autoextend
    innodb_flush_method = O_DIRECT
    innodb_io_capacity = 3000
    innodb_io_capacity_max = 6000
    innodb_adaptive_hash_index = OFF
    sync_binlog = 1
    sync_relay_log = 1
    tmp_table_size = 32M
    max_heap_table_size = 32M
    thread_stack = 512K
    thread_cache_size = 30
    key_buffer_size = 256M
    read_buffer_size = 8M
    sort_buffer_size = 4M
    join_buffer_size = 4M
    read_rnd_buffer_size = 4M
    binlog_cache_size = 16M
    binlog_expire_logs_auto_purge = OFF
    binlog_expire_logs_seconds = 3280000000
    log_replica_updates = ON
    log_bin = master
    relay_log = relay
    #relay_log_purge = ON
    #relay_log_recovery = ON
    skip_name_resolve = ON
    net_buffer_length = 32k
    net_retry_count = 16380
    #read_only = ON
    #super_read_only = ON
    #performance_schema = OFF
    event_scheduler = OFF
    mysqlx = OFF
    mysqlx_port = 33060
    mysqlx_socket = /tmp/mysqlx.sock
    mysqlx_bind_address = 127.0.0.1,::1
    [mysqldump]
    max_allowed_packet = 1G
    quote_names
    quick
    第 1 条附言  ·  2023-11-13 18:13:10 +08:00
    上面的配置是已经上线稳定运行 1 年左右,因为要考虑搬迁,新的调整配置如下:
    第 2 条附言  ·  2023-11-13 18:14:04 +08:00
    [client]
    port = 3306
    socket = /tmp/mysql.sock

    [mysqld]
    user = mysql
    port = 3306
    socket = /tmp/mysql.sock
    server_id = 100
    # bind_address = 127.0.0.1
    basedir = /usr/local
    datadir = /var/db/mysql
    tmpdir = /var/db/mysql_tmpdir
    log_error = /var/db/mysql/error.log
    replica_load_tmpdir = /var/db/mysql_tmpdir
    secure_file_priv = /var/db/mysql_secure
    authentication_policy = caching_sha2_password
    explicit_defaults_for_timestamp = ON

    # Performance related settings
    max_connections = 888
    max_connect_errors = 2000
    max_allowed_packet = 1G
    innodb_file_per_table = ON
    innodb_sort_buffer_size = 64M
    innodb_buffer_pool_size = 48G
    innodb_redo_log_capacity = 4G
    innodb_write_io_threads = 8
    innodb_read_io_threads = 8
    innodb_log_buffer_size = 64M
    innodb_data_home_dir = /var/db/mysql
    innodb_log_group_home_dir = /var/db/mysql
    innodb_data_file_path = ibdata1:128M:autoextend
    innodb_temp_data_file_path = ibtmp1:128M:autoextend
    innodb_flush_method = O_DIRECT
    innodb_io_capacity = 3000
    innodb_io_capacity_max = 6000
    innodb_adaptive_hash_index = OFF
    tmp_table_size = 128M
    max_heap_table_size = 128M
    # thread_stack = 1M
    # thread_cache_size = 30
    # sort_buffer_size = 4M
    # join_buffer_size = 4M
    # read_buffer_size = 8M
    # read_rnd_buffer_size = 4M
    # net_buffer_length = 32k
    net_retry_count = 16380
    key_buffer_size = 256M

    sync_binlog = 1
    sync_relay_log = 1
    relay_log = relay
    # relay_log_purge = ON
    # relay_log_recovery = ON
    log_bin = master
    log_replica_updates = ON
    binlog_cache_size = 16M
    binlog_expire_logs_auto_purge = OFF
    binlog_expire_logs_seconds = 3280000000
    gtid_mode = ON
    enforce_gtid_consistency = ON

    skip_name_resolve = ON
    event_scheduler = OFF
    mysqlx = OFF
    mysqlx_port = 33060
    mysqlx_socket = /tmp/mysqlx.sock
    mysqlx_bind_address = 127.0.0.1,::1
    # read_only = ON
    # super_read_only = ON
    # performance_schema = OFF

    [mysqldump]
    max_allowed_packet = 1G
    quote_names
    quick
    第 3 条附言  ·  2023-11-13 18:15:51 +08:00
    max_connections 根据业务并发情况进行调整,设置过大会提前占用更多内存。
    第 4 条附言  ·  2023-11-13 20:38:28 +08:00
    MYSQL 启用大页面支持,huge page 能给 MySQL 带来性能提升。
    my.cnf [mysqld] 添加 large_pages = 1
    不同的系统也需在相应的设置;
    第 5 条附言  ·  2023-11-14 20:27:41 +08:00
    innodb_buffer_pool_instances = 48
    计算公式:
    mysql> SELECT @@innodb_buffer_pool_size/1024/1024/1024;
    11 条回复    2023-12-22 21:31:22 +08:00
    atonganan
        1
    atonganan  
       2023-11-13 13:55:22 +08:00
    max_allowed_packet = 512M
    不够用把 。
    ab
        2
    ab  
       2023-11-13 14:13:11 +08:00
    搭车问一下,如有重复项,是前置的优先,还是前置的?
    atonganan
        3
    atonganan  
       2023-11-13 14:23:05 +08:00
    @ab 同一区域的重复项,最后一个生效
    ab
        4
    ab  
       2023-11-13 14:30:12 +08:00
    @atonganan 谢谢
    Aluhao
        5
    Aluhao  
    OP
       2023-11-13 16:16:31 +08:00
    @atonganan
    max_allowed_packet = 512M
    设置过大会不会引发什么问题,我看文档有建议设置成 1G
    SunsetYe
        6
    SunsetYe  
       2023-11-14 16:51:14 +08:00
    迁移到 AWS 的话可以考虑直接用 RDS ?
    Aluhao
        7
    Aluhao  
    OP
       2023-11-14 20:26:58 +08:00
    @SunsetYe RDS 太贵了
    MoMMM
        8
    MoMMM  
       2023-11-15 11:20:26 +08:00
    请教下新的配置中,注释掉诸如 join_buffer_size 等一系列相关的 buffer_size 的考虑是什么?
    Aluhao
        9
    Aluhao  
    OP
       2023-11-16 10:10:47 +08:00   ❤️ 1
    @MoMMM 缓冲区设置较大可能会触发将这些缓冲区分页到磁盘,会极大地减慢数据库的速度并造成瓶颈。
    Aluhao
        10
    Aluhao  
    OP
       2023-11-16 10:12:07 +08:00
    @MoMMM MySQL 的文档警告说:较大的值可能会显着减慢内存分配速度。
    E1n
        11
    E1n  
       337 天前
    max_allowed_packet = 512M 合理吗默认数值是 1G 吧,Mysql InnoDB Cluster 方案要求为 2G ,现在生产是 2G:)
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