### Cause: java.sql.SQLException: The table 'xxx' is full

本文探讨了遇到SQL表满错误的多种原因,包括磁盘空间不足、InnoDB表空间文件容量限制、操作系统文件大小限制及MyISAM表内部指针大小限制等,并提供了相应的解决策略。

### Cause: java.sql.SQLException: The table 'xxx' is full
; uncategorized SQLException; SQL state [HY000]; error code [1114]; The table 'xxx' is full; nested exception is java.sql.SQLException: The table 'xxx' is full

 

If you encounter a full-table error, there are several reasons why it might have occurred:

  • The disk might be full.

  • You are using InnoDB tables and have run out of room in an InnoDB tablespace file. The maximum tablespace size is also the maximum size for a table. For tablespace size limits, see Section 14.6.1.6, “Limits on InnoDB Tables”.

    Generally, partitioning of tables into multiple tablespace files is recommended for tables larger than 1TB in size.

  • You have hit an operating system file size limit. For example, you are using MyISAM tables on an operating system that supports files only up to 2GB in size and you have hit this limit for the data file or index file.

  • You are using a MyISAM table and the space required for the table exceeds what is permitted by the internal pointer size. MyISAM permits data and index files to grow up to 256TB by default, but this limit can be changed up to the maximum permissible size of 65,536TB (2567 − 1 bytes).

 

Java数据库查询时出现 `java.sql.SQLException: connection holder is null` 错误,通常是由于数据库连接超过了 `removeAbandonedTimeout` 规定的时间没有主动关闭,连接池启用自我保护机制把连接关闭,当程序再使用这个连接就会报错。以下是一些解决该问题的方法: ### 1. 加上验证数据库服务可用性的SQL 使用能够检测连接是否有效的SQL语句来验证数据库连接。例如,在使用连接池时,可以配置连接池在获取连接时执行该验证SQL。以Apache DBCP连接池为例,代码示例如下: ```java import org.apache.commons.dbcp2.BasicDataSource; import java.sql.Connection; import java.sql.SQLException; public class DatabaseConnectionExample { public static void main(String[] args) { BasicDataSource dataSource = new BasicDataSource(); dataSource.setUrl("jdbc:mysql://localhost:3306/your_database"); dataSource.setUsername("your_username"); dataSource.setPassword("your_password"); // 设置验证连接是否有效的SQL语句 dataSource.setValidationQuery("SELECT 1"); try { Connection connection = dataSource.getConnection(); // 使用连接进行数据库操作 connection.close(); } catch (SQLException e) { e.printStackTrace(); } } } ``` ### 2. 确保及时关闭数据库连接 在代码中确保在使用完数据库连接后及时关闭。可使用 `try-with-resources` 语句来自动管理连接的关闭,示例如下: ```java import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.Statement; public class DatabaseQueryExample { public static void main(String[] args) { String url = "jdbc:mysql://localhost:3306/your_database"; String username = "your_username"; String password = "your_password"; try (Connection connection = DriverManager.getConnection(url, username, password); Statement statement = connection.createStatement(); ResultSet resultSet = statement.executeQuery("SELECT * FROM your_table")) { while (resultSet.next()) { // 处理查询结果 } } catch (Exception e) { e.printStackTrace(); } } } ``` ### 3. 调整连接池参数 可以调整连接池的 `removeAbandonedTimeout` 等参数,避免连接过早被关闭。以HikariCP连接池为例,代码示例如下: ```java import com.zaxxer.hikari.HikariConfig; import com.zaxxer.hikari.HikariDataSource; import java.sql.Connection; import java.sql.SQLException; public class HikariCPExample { public static void main(String[] args) { HikariConfig config = new HikariConfig(); config.setJdbcUrl("jdbc:mysql://localhost:3306/your_database"); config.setUsername("your_username"); config.setPassword("your_password"); // 调整removeAbandonedTimeout等参数 config.setIdleTimeout(30000); config.setMaxLifetime(1800000); HikariDataSource dataSource = new HikariDataSource(config); try { Connection connection = dataSource.getConnection(); // 使用连接进行数据库操作 connection.close(); } catch (SQLException e) { e.printStackTrace(); } } } ```
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