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  • paip.mysql备份慢的解决



    paip.mysql备份慢的解决.txt


    作者Attilax ,  EMAIL:1466519819@qq.com 
    来源:attilax的专栏
    地址:http://blog.csdn.net/attilax


    版本5.0.45-community-nt
    主数据库50W数据,备份的sql34M..压缩后5.8m


    原来备份178 S.. 调整MY.INI  加大10倍...  而个88S... 不压缩的情况下45s




    换成个5.6 , 还要中多时间,要不走粤慢兰..
    不压缩的情况下43s...  调整MY.INI  加大10倍.  40S.....差距不明显木..










    最终解决方案:copy备份
    ---------------------------
    ..块啊,7秒搞定..是热备份.不用关机..






    参考其他自料儿..
    ====================
    数据文件大约200GB,平时备份(mysqldump)压缩后的大小大约20GB,正常备份时间在2个小时内。一台服务器上,安装了多个mysql实例


    ,这个数据库是其中一个




    mysql按照备份恢复方式分为逻辑备份和物理备份


    逻辑备份是备份sql语句,在恢复的时候执行备份的sql语句实现数据库数据的重现


    物理备份就是备份数据文件了,比较形象点就是cp下数据文件,但真正备份的时候自然不是的cp这么简单


    这2种备份各有优劣,一般来说,物理备份恢复速度比较快,占用空间比较大,逻辑备份速度比较慢,占用空间比较小
    mysqldump工具备份


    mysqldump由于是mysql自带的备份工具,所以也是最常用的mysql数据库的备份工具。支持基于InnoDB的热备份。但由于是逻辑备份,所以


    速度不是很快,适合备份数据量比较小的场景。
    mysqldump完全备份+二进制日志 —>实现时间点恢复










    看累挂CFG DEFAULT    show  VARIABLES like '%size%'
    -----------------------------------------------






    binlog_cache_size 32768
    binlog_stmt_cache_size 32768
    bulk_insert_buffer_size 8388608
    delayed_queue_size 1000
    host_cache_size 279
    innodb_additional_mem_pool_size 8388608
    innodb_buffer_pool_size 134217728
    innodb_change_buffer_max_size 25
    innodb_ft_cache_size 8000000
    innodb_ft_max_token_size 84
    innodb_ft_min_token_size 3
    innodb_log_buffer_size 8388608
    innodb_log_file_size 50331648
    innodb_online_alter_log_max_size 134217728
    innodb_page_size 16384
    innodb_purge_batch_size 300
    innodb_sort_buffer_size 1048576
    innodb_sync_array_size 1
    join_buffer_size 262144
    key_buffer_size 8388608
    key_cache_block_size 1024
    large_page_size 0
    max_binlog_cache_size 18446744073709547520
    max_binlog_size 1073741824
    max_binlog_stmt_cache_size 18446744073709547520
    max_heap_table_size 16777216
    max_join_size 18446744073709551615
    max_relay_log_size 0
    metadata_locks_cache_size 1024
    myisam_data_pointer_size 6
    myisam_max_sort_file_size 2146435072
    myisam_mmap_size 4294967295
    myisam_sort_buffer_size 8388608
    optimizer_trace_max_mem_size 16384
    performance_schema_accounts_size 100
    performance_schema_digests_size 10000
    performance_schema_events_stages_history_long_size 10000
    performance_schema_events_stages_history_size 10
    performance_schema_events_statements_history_long_size 10000
    performance_schema_events_statements_history_size 10
    performance_schema_events_waits_history_long_size 10000
    performance_schema_events_waits_history_size 10
    performance_schema_hosts_size 100
    performance_schema_session_connect_attrs_size 512
    performance_schema_setup_actors_size 100
    performance_schema_setup_objects_size 100
    performance_schema_users_size 100
    preload_buffer_size 32768
    profiling_history_size 15
    query_alloc_block_size 8192
    query_cache_size 1048576
    query_prealloc_size 8192
    range_alloc_block_size 4096
    read_buffer_size 131072
    read_rnd_buffer_size 262144
    slave_pending_jobs_size_max 16777216
    sort_buffer_size 262144
    thread_cache_size 9
    tmp_table_size 16777216
    transaction_alloc_block_size 8192
    transaction_prealloc_size 4096
     




    加大10背
    ----------


     log-error=d:/MySQL56/mysql_log_err.txt




    thread_cache = 128 


      query_cache_type = 1 


     query_cache_size = 128M  


      join_buffer_size = 80M  






      sort_buffer_size = 20M  
      read_buffer_size = 20M 
     read_rnd_buffer_size = 20M  


      max_heap_table_size = 128M  


     tmp_table_size = 128M  
     


      binlog_cache_size = 12M  


      max_binlog_size = 512M  


      expire_logs_days = 3 
    #  innodb_buffer_pool_size = 2G 
     






      innodb_use_sys_malloc = 1 


    sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES 


    #MySQL 数据库常见调优方法及参数设置 - 皮皮的个人页面 - 开源中国社区



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  • 原文地址:https://www.cnblogs.com/suncoolcat/p/3292173.html
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