运行中的mysql状态查看 对正在运行的mysql进行监控,其中一个方式就是查看mysql运行状态。 (1)QPS(每秒Query量) QPS = Questions(or Queries) / seconds mysql > show global status like 'Question%'; (2...【阅读全文】
问题:2017-05-31T10:31:05.945111Z 0 [Note] InnoDB: Need to create a new innodb_system data file 'ibdata2'.2017-05-31T10:31:05.945126Z 0 [Note] InnoDB: Need to create a new innodb_system data file 'ibdata3'.2017-05-31T10:31:05.945131Z 0 [Note] InnoDB: Need to create a new innodb_system data file 'i...【阅读全文】
问题:2017-05-31T10:31:05.945111Z 0 [Note] InnoDB: Need to create a new innodb_system data file 'ibdata2'.2017-05-31T10:31:05.945126Z 0 [Note] InnoDB: Need to create a new innodb_system data file 'ibdata3'.2017-05-31T10:31:05.945131Z 0 [Note] InnoDB: Need to create a new innodb_system data file 'i...【阅读全文】
问题:2017-05-31T10:31:05.945111Z 0 [Note] InnoDB: Need to create a new innodb_system data file 'ibdata2'.2017-05-31T10:31:05.945126Z 0 [Note] InnoDB: Need to create a new innodb_system data file 'ibdata3'.2017-05-31T10:31:05.945131Z 0 [Note] InnoDB: Need to create a new innodb_system data file 'i...【阅读全文】
问题:2017-05-31T10:31:05.945111Z 0 [Note] InnoDB: Need to create a new innodb_system data file 'ibdata2'.2017-05-31T10:31:05.945126Z 0 [Note] InnoDB: Need to create a new innodb_system data file 'ibdata3'.2017-05-31T10:31:05.945131Z 0 [Note] InnoDB: Need to create a new innodb_system data file 'i...【阅读全文】
重要字段:Id: 连接标识符 可以进行连接查询 information_schema.processlist.ID performance_schema.threads.processlist_idcommand: Binlog DumpThis is a thread on a master server for sending binary log contents to a slave server.Chan...【阅读全文】
查找数据库中的重复记录(多个字段):SELECT * FROM wcs_best_fitness_individual WHERE (spokeCounts,isSpokeClosure,deflectionAngleOne,deflectionAngleTwo) IN (SELECT spokeCounts,isSpokeClosure,deflectionAngleOne,deflectionAngleTwo FROM wcs_best_fitness_individual GROUP BY spokeCounts,isSpok...【阅读全文】