innodb_flush_log_at_trx_commit参数用来控制缓冲区中的数据写入到日志文件以级日志文件数据刷新到磁盘的操作机制.0表示每秒写日志文件,并刷硬盘;1表示每事务写日志文件,并刷硬盘;2表示每事务写日志,但不刷硬盘. sync_binlog=1是最安全但是性能损耗最大的设置,是差不多比sync_binlog=0时的写入性能差5倍左右. ...
内存写入磁盘 会先在redo log 里面保存doblewrite 顺序读写 让后在写入数据。放置宕机,写入失败。 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 存储引擎核心参数 双一标准之一: redo log 刷写参数 innodb_flush_log_at_trx_commit=1/0/2 1:每次事务提交时,会立即刷新redo到磁盘,commit才能成...
In the mysql config file, innodb_flush_log_at_trx_commit is set to 2. However, the MySQL official document recommends to set it to 1, which helps keep InnoDB ACID Compliant. "For durability and consistency in a replication setup that use...
SET PERSIST innodb_flush_log_at_trx_commit=0,join_buffer_size=262144; { "mysql_server": {"innodb_checksum_algorithm": "strict_crc32" , "innodb_default_row_format": "compact" , "innodb_fast_shutdown": "0" , "innodb_flush_log_at_trx_commit": "0" , ...
一般设置物理内存的30-40% read_buffer_size = 128K #读操作缓冲区大小,推荐设置16M或32M InnoDB参数...一般设置物理内存的60%-70% innodb_buffer_pool_instances = 1 #缓冲池实例个数,推荐设置4个或8个 innodb_flush_log_at_trx_commit = 1 #关键参数...对数据安全性要求不是很高的推荐设置2,性能高,...
innodb_buffer_pool_size=2G innodb_buffer_pool_instances=2 innodb_log_buffer_size=256M innodb_log_file_size=256M innodb_thread_concurrency=18 innodb_flush_log_at_trx_commit=2 innodb_file_per_table=1 [root@server ~]# ./tuning-primer.sh ...
set global options,10# mysql-data-dir/my.cnf to set server-specific options11# (@localstatedir@ for this installation) or to12# ~/.my.cnf to set user-specific options.13#14# On Windows you should keep this file in the installation directory15# of your server (e.g. C:\Program Files...
innodb_flush_log_at_trx_commit=1 # The size of the buffer InnoDB uses for buffering log data. As soon as # it is full, InnoDB will have to flush it to disk. As it is flushed # once per second anyway, it does not make sense to have it very large ...
使用SET GLOBAL不会影响您执行该陈述式的目前工作阶段。它会变更全域选项，但目前工作阶段仍会使用工作...
server-id = 201 log_bin = /var/export/websrvDB.log/websrvDB-bin binlog_format = ROW binlog_do_db = websrvDB_pdw innodb_flush_log_at_trx_commit = 1 sync_binlog = 1 binlog_ignore_db = websrvDB_archive binlog_ignore_db = websrvDB_temp binlog_ignore_db = websrvDB_userdata ...