时间:2021-07-01 10:21:17 帮助过:34人阅读
paip.mysql备份慢的解决
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..
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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
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