如何释放已删除的InnoDB磁盘空间
Innodb数据库对于已经删除的数据只是标记为删除,并不真正释放所占用的磁盘空间,这就导致InnoDB数据库文件不断增长。如果想彻底
Innodb数据库对于已经删除的数据只是标记为删除,并不真正释放所占用的磁盘空间,这就导致InnoDB数据库文件不断增长。如果想彻底释放这些已经删除的数据,,需要把数据库导出,删除InnoDB数据库文件,然后再倒入。 下面是基本的步骤:
1 使用mysqldump命令将InnoDB数据库导出
2 停止MySQL
3 删除所有InnoDB数据库文件和日志
4 启动MySQL并自动重建InnoDB数据库文件和日志文件
5 导入前面备份的数据库文件
有一点要注意,你配置了MySQL数据库复制,当你导入数据库备份文件的时候,所有的Query都可能会被写入Binlog,可以执行SET SQL_LOG_BIN = 0;暂时停止Binlog的写入。
还有一种方式是在创建数据库的时候设置innodb_file_per_table,这样InnoDB会对每个表创建一个数据文件,然后只需要运行OPTIMIZE TABLE * 命令就可以释放所有已经删除的磁盘空间。

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In 2025, global digital virtual currency trading platforms are fiercely competitive. This article authoritatively releases the top ten digital virtual currency trading platforms in the world in 2025 based on indicators such as transaction volume, security, and user experience. OKX ranks first with its strong technical strength and global operation strategy, and Binance follows closely with high liquidity and low fees. Platforms such as Gate.io, Coinbase, and Kraken are at the forefront with their respective advantages. The list covers trading platforms such as Huobi, KuCoin, Bitfinex, Crypto.com and Gemini, each with its own characteristics, but investment should be cautious. To choose a platform, you need to consider factors such as security, liquidity, fees, user experience, currency selection and regulatory compliance, and invest rationally

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Top 10 digital currency trading platforms: 1. OKX, 2. Binance, 3. Gate.io, 4. Huobi Global, 5. Kraken, 6. Coinbase, 7. KuCoin, 8. Bitfinex, 9. Crypto.com, 10. Gemini, these exchanges have their own characteristics, and users can choose the platform that suits them based on factors such as security, fees, currency selection, user interface and customer support.

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This article provides Android and Apple mobile APP download methods for mainstream digital currency trading platforms such as Binance, OKX, Gate.io, Huobi Global, Coinbase, KuCoin, Kraken and Bitfinex. Whether it is an Android user or an Apple user, you can easily find the official APP download link for the corresponding platform and complete the installation according to the steps. The article provides detailed guidance on searching and downloading on their respective official websites or app stores, and provides instructions on the special steps for installing APK files on Android, so that users can download and use them quickly and easily.

The rankings of the top ten virtual currency trading platforms are: 1. OKX; 2. Binance; 3. Gate.io; 4. Huobi Global; 5. Kraken; 6. Coinbase; 7. KuCoin; 8. Crypto.com; 9. Bitfinex; 10. Gemini. The ranking is based on comprehensive considerations such as platform liquidity, currency selection, security, user experience, handling fees and compliance, but is for reference only. Investment should be cautious and at your own risk.
