• MySQL性能优化之优化配置my.cnf文件


    [client]
    #password = your_password
    port = 3306
    socket = /opt/mysql/dbdata/mysql.sock

    # The MySQL server
    [mysqld]
    port = 3306
    socket = /opt/mysql/dbdata/mysql.sock
    skip-external-locking
    key_buffer_size = 384M
    max_allowed_packet = 1M
    table_open_cache = 512

    #sort_buffer_size = 2M
    sort_buffer_size = 256M

    #read_buffer_size = 2M
    read_buffer_size = 32M

    #read_rnd_buffer_size = 8M
    read_rnd_buffer_size = 32M

    myisam_sort_buffer_size = 64M

    thread_cache_size = 8
    query_cache_size= 32M

    #开启慢查询日志
    log_slow_admin_statements=ON
    log_slow_slave_statements=ON
    slow_query_log=1

    #慢查询日志文件存放路径
    slow_query_log_file=/opt/mysql/mysqllog/logfile/slow-query.log

    #执行的时间大于多少秒的SQL语句记录到慢查询日志
    long_query_time=2

    #未使用索引的查询也记录到文件
    log_queries_not_using_indexes = 1

    #日志记录写到日志文件
    log_output='FILE'


    #数据连接等待时间,单位秒
    interactive_timeout = 1800
    wait_timeout = 1800

    basedir = /opt/mysql/product
    datadir = /opt/mysql/dbdata
    max_binlog_size=100M
    log_bin=/opt/mysql/mysqllog/binlog/binlog.bin
    log-error=/opt/mysql/mysqllog/logfile/mysql-err.log

    binlog_format=mixed
    expire_logs_days=7
    binlog_cache_size=4MB

    pid-file = /opt/mysql/dbdata/mysql.pid
    default-storage-engine=MyISAM

    user = mysql

    group_concat_max_len = 10240
    max_connections=3000

    #(cpu+磁盘)数量的2倍
    #thread_concurrency = 8
    thread_concurrency = 24

    # Point the following paths to a dedicated disk
    #tmpdir = /tmp/
    #skip-networking

    log-bin=mysql-bin

    server-id = 1

    #server-id = 2
    #
    # The replication master for this slave - required
    #master-host = <hostname>
    #
    # The username the slave will use for authentication when connecting
    # to the master - required
    #master-user = <username>
    #
    # The password the slave will authenticate with when connecting to
    # the master - required
    #master-password = <password>
    #
    # The port the master is listening on.
    # optional - defaults to 3306
    #master-port = <port>
    #
    # binary logging - not required for slaves, but recommended
    #log-bin=mysql-bin
    #
    # binary logging format - mixed recommended
    binlog_format=mixed


    #使用 InnoDB 引擎,可开启以下配置项
    # Uncomment the following if you are using InnoDB tables
    #innodb_data_home_dir = /opt/mysql/dbdata
    #innodb_data_file_path = ibdata1:10M:autoextend
    #innodb_log_group_home_dir = /opt/mysql/dbdata

    #数据和索引缓冲区的大小
    #innodb_buffer_pool_size = 256M
    #innodb_buffer_pool_size = 10240M

    #数据字段和其他数据结构的大小
    #innodb_additional_mem_pool_size = 20M
    #innodb_additional_mem_pool_size = 20M

    # Set .._log_file_size to 25 % of buffer pool size
    #redo日志大小
    #innodb_log_file_size = 64M
    #innodb_log_file_size = 2560M

    #日志缓冲区的大小
    #innodb_log_buffer_size = 8M
    #innodb_log_buffer_size = 16M

    #0 提交事物不写入日志,每秒日志文件写入和flush磁盘
    #1 每秒或每次事物提交时,日志文件写入 flush磁盘
    #2 每次事物提交时,日志文件写入,每秒flush磁盘
    #innodb_flush_log_at_trx_commit = 1
    #innodb_flush_log_at_trx_commit = 1

    #innodb_lock_wait_timeout = 50

    [mysqldump]
    quick
    max_allowed_packet = 16M

    [mysql]
    no-auto-rehash
    # Remove the next comment character if you are not familiar with SQL
    #safe-updates

    [myisamchk]
    #key_buffer_size = 128M
    #sort_buffer_size = 128M
    #read_buffer = 2M
    #write_buffer = 2M

    key_buffer_size = 256M
    sort_buffer_size = 256M
    read_buffer = 32M
    write_buffer = 32M

    [mysqlhotcopy]
    interactive-timeout

    [mysqlhotcopy]
    interactive-timeout

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  • 原文地址:https://www.cnblogs.com/NiceTime/p/6848132.html
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