root@localhost:(none) 06:22:17>pager grep seq PAGER set to 'grep seq' root@localhost:(none) 06:30:33>show engine innodb status\G select sleep(60); show engine innodb status\G Log sequence number 29532909727 1 row in set (0.00 sec) 1 row in set (1 mi…

原文链接:http://www.mysqlperformanceblog.com/2008/11/21/how-to-calculate-a-good-innodb-log-file-size/ Peter wrote a post a while ago about choosing a good InnoDB log file size.  Not to pick on Peter, but the post actually kind of talks about a lot of th…

Peter wrote a post a while ago about choosing a good InnoDB log file size.  Not to pick on Peter, but the post actually kind of talks about a lot of things and then doesn’t tell you how to choose a good log file size!  So I thought I’d clarify it a…

Q: innodb log file与binlog的区别在哪里?有人说1.mysql的innodb引擎实际上是包装了inno base存储引擎.而innodb log file是由 inno base自身带来. 而mysql自身因为还有myisam等存储引擎,需要设置自己的日志文件来用于所有的存储引擎记录日志信 息,因此增加了binlog.从某种意义上说binlog对于innodb存储引擎来说与innodb log是有些重复的.2.binlog应该是mysql真正的redo日志 A: 1. bi…

简介: 数据库的东西,往往一个参数就牵涉N多知识点.所以简单的说一下.大家都知道innodb是支持事务的存储引擎.事务的四个特性ACID即原子性(atomicity),一致性(consistency),隔离性(isolation),持久性(durability).其中原子性,一致性,持久性通过redo log 和 undo来实现.redo log称为重做日志,用来保证事务的原子性和持久性.undo log用来保证事务的一致性. 当事务提交时,必须先将该事务的所有日志写入到重做日志文件(redo…

本文主要研究一下flink的log.file配置 log4j.properties flink-release-1.6.2/flink-dist/src/main/flink-bin/conf/log4j.properties # This affects logging for both user code and Flink log4j.rootLogger=INFO, file # Uncomment this if you want to _only_ change Flink's lo…

14.6.1 InnoDB Startup Configuration 启动配置 首先描述关于InnoDB 配置设计数据库文件,日志文件,page size 和内存buffer 的配置. 推荐你定义数据文件,日志文件和page size 配置在创建InnoDB之前,修改数据文件或者log file 配置在InnoDB 实力被创建后可能 涉及重大的过程,page size 只能在InnoDB 实例首次初始化后创建. 除了这些主题,这个章节提供信息关于指定的InnoDB 选项在配置文件里, 查看In…

InnoDB: Error: log file ./ib_logfile0 is of different size bytesInnoDB: than specified in the .cnf file bytes! 解决办法:可以计算一下33554432的大小,33554432/1024/1024=32查看my.cnf配置文件的innodb_log_file_size参数配置:innodb_log_file_size = 32M 需要调整这个文件的大小再计算一下50331648的大小,50…

mariadb 启动中 InnoDB: Error: log file ./ib_logfile0 is of different size 0 起因:线上正在运行的系统,因为需要调整性能,变更了my.cnf参数的innodb_log_file_size大小,重启MySQL时err日志输出如下InnoDB: Error: log file ./ib_logfile0 is of different size 0 xxxx bytes 停掉mariadb 解决办法:移除原有ib_logfile#m…

启动WAMP Server的时候报例如以下的错误: 140618 23:12:32 [Note] Plugin 'FEDERATED' is disabled. 140618 23:12:32 InnoDB: The InnoDB memory heap is disabled 140618 23:12:32 InnoDB: Mutexes and rw_locks use Windows interlocked functions 140618 23:12:32 InnoDB: Compres…