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mysql宕掉的问题解决 可能原因是数据过多导致。 mysql 命令可以识别 但是进去后不能执行相关的mysql命令， 需要： 1，停掉mysql2，在 /etc/my.cnf 文件中添加innodb_force_recovery=6 （如下示） InnoDB强制恢复 [mysqld] innodb_force_recovery = 4(1-6) 1.innodb_force_recovery=1，即使发现了损坏页面也继续让服务器继续运行，这个选项对于备份或者转存当前数据尤为有用
2.innodb_force_recovery=2，阻止恢复主线程的运行，如果清除操作会导致服务器挂掉 3.innodb_force_recovery=3，恢复后不回滚事务 4.innodb_force_recovery=4，如果插入到缓冲区的合并操作会导致系统崩溃，将不会被执行 5 innodb_force_recovery=5，启动数据库时，忽略撤消日志 6.innodb_force_recovery=6，启动数据库时，忽略与恢复相关的前滚日志 3，连上mysql备份相关的数据库4，drop掉备份的数据库 5，重新创建该数据库6，去掉innodb_force_recovery=67，导入备份数据库，问题解决。 bitsCN.com
MySQL: BLOB and other no-sql storage, what are the differences?May 13, 2025 am 12:14 AMMySQL'sBLOBissuitableforstoringbinarydatawithinarelationaldatabase,whileNoSQLoptionslikeMongoDB,Redis,andCassandraofferflexible,scalablesolutionsforunstructureddata.BLOBissimplerbutcanslowdownperformancewithlargedata;NoSQLprovidesbetterscalabilityand
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MySQL BLOB: how to optimize BLOBs requestsMay 13, 2025 am 12:03 AMOptimizing MySQLBLOB requests can be done through the following strategies: 1. Reduce the frequency of BLOB query, use independent requests or delay loading; 2. Select the appropriate BLOB type (such as TINYBLOB); 3. Separate the BLOB data into separate tables; 4. Compress the BLOB data at the application layer; 5. Index the BLOB metadata. These methods can effectively improve performance by combining monitoring, caching and data sharding in actual applications.
Adding Users to MySQL: The Complete TutorialMay 12, 2025 am 12:14 AMMastering the method of adding MySQL users is crucial for database administrators and developers because it ensures the security and access control of the database. 1) Create a new user using the CREATEUSER command, 2) Assign permissions through the GRANT command, 3) Use FLUSHPRIVILEGES to ensure permissions take effect, 4) Regularly audit and clean user accounts to maintain performance and security.
Mastering MySQL String Data Types: VARCHAR vs. TEXT vs. CHARMay 12, 2025 am 12:12 AMChooseCHARforfixed-lengthdata,VARCHARforvariable-lengthdata,andTEXTforlargetextfields.1)CHARisefficientforconsistent-lengthdatalikecodes.2)VARCHARsuitsvariable-lengthdatalikenames,balancingflexibilityandperformance.3)TEXTisidealforlargetextslikeartic
MySQL: String Data Types and Indexing: Best PracticesMay 12, 2025 am 12:11 AMBest practices for handling string data types and indexes in MySQL include: 1) Selecting the appropriate string type, such as CHAR for fixed length, VARCHAR for variable length, and TEXT for large text; 2) Be cautious in indexing, avoid over-indexing, and create indexes for common queries; 3) Use prefix indexes and full-text indexes to optimize long string searches; 4) Regularly monitor and optimize indexes to keep indexes small and efficient. Through these methods, we can balance read and write performance and improve database efficiency.
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