步骤(一):当主库记录binlog时,将events中加入checksum标记; 步骤(二):当Dump Thread读取events时,进行checksum校验,通常并不需要校验; 步骤(三):该阶段也没有必要进行checksum校验,I/O Thread对于从Dump Thread复制过来的events是否正常的判断,可在写入relay log时再去校验,复制过来的events也都带有checksum标记; 步...
--write-binlogLog ANALYZE, OPTIMIZE, REPAIR statements to binary log. --skip-write-binlog adds NO_WRITE_TO_BINLOG to these statements. MySQL数据库mysqlcheck的使用方法的相关知识是本文我们主要要介绍的内容,我们知道,mysqlcheck,是mysql自带的可以检查和修复MyISAM表,并且它还可以优化和分析表,mysqlcheck...
# mysqlcheck -uroot -p --auto-repair -c -o newmandelaError:mysqlcheck doesn't support multiple contradicting commands. 上面的命令报错了,去掉-c # mysqlcheck -uroot -p --auto-repair -o newmandelaEnter password:newmandela.accountnote :Tabledoesnotsupportoptimize,doingrecreate+analyzeinsteadstatus :...
myisamlog — Display MyISAM Log File Contents myisampack — Generate Compressed, Read-Only MyISAM Tables mysql_config_editor — MySQL Configuration Utility mysqlbinlog — Utility for Processing Binary Log Files mysqldumpslow — Summarize Slow Query Log Files Program Development Utilities Misce...
[root@localhost~]# mysqladmin create ma_test; 同时,它也可以用于查看一些服务器的状态信息,比如说我们经常会使用的 processlist ,就可以直接使用 mysqladmin 来查看。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 [root@localhost~]# mysqladmin processlist+---+---+---+---+---+---+---+-...
mysql的sql调优: slow_query_log_file 2019-12-21 16:19 −mysql有一个功能就是可以log下来运行的比较慢的sql语句,默认是没有这个log的,为了开启这个功能,要修改my.cnf或者在mysql启动的时候加入一些参数。如果在my.cnf里面修改,需增加如下几行 long_query_time = 1 ... ...
Write a debugging log. A typicaldebug_optionsstring isd:t:o,file_name. The default isd:t:o. This option is available only if MySQL was built usingWITH_DEBUG. MySQL release binaries provided by Oracle arenotbuilt using this option.
Description:---[For better reports, please attach the log file after submitting. You can find it in C:\Users\yuran\AppData\Roaming\MySQL\Workbench\log\wb.log] MySQL Workbench failed to check for update. The pop up window says: "AttributeError: 'CheckForUpdateThread' object has no attribute...
it can be used in the same Hibernate session to run multiple queries. So effectively we are holding a db connection till Hibernate session is destroyed. There is option to manually terminate session & create a new one for next Hibernate query. I want to check the actual log of that & try...
在primary index 里面, 在delete 之后又insert 一个数据, 会将该record delete marked 标记改成non-delete marked, 然后记录一个delete marked 的record 在undo log 里面, 这样如果有历史版本的查询, 会通过mvcc 从undo log 中恢复该数据. 因此不会出现相同的delete mark record 跨多个page 的情况, 也就不会出...