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MySQL Error number: MY-013974; Symbol: ER_BULK_PARSER_ROW_BUFFER_MAX_TOTAL_COLS_EXCEEDED_LOG; SQLSTA

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MySQL Error number: MY-013974; Symbol: ER_BULK_PARSER_ROW_BUFFER_MAX_TOTAL_COLS_EXCEEDED_LOG; SQLSTA

文档解释

Error number: MY-013974; Symbol: ER_BULK_PARSER_ROW_BUFFER_MAX_TOTAL_COLS_EXCEEDED_LOG; SQLSTATE: HY000

Message: The number of input columns that need to be buffered for parsing exceeded predefined buffer max size for file ‘%s’.

Error number: MY-013974; Symbol: ER_BULK_PARSER_ROW_BUFFER_MAX_TOTAL_COLS_EXCEEDED_LOG; SQLSTATE: HY000

错误说明

MySQL的ER_BULK_PARSER_ROW_BUFFER_MAX_TOTAL_COLS_EXCEEDED_LOG错误由MySQL引擎返回,指出批量操作的行的大小超过了服务器上设置的“max_bulk_rows”或“max_total_cols”变量。这两个变量可以用来控制批量操作时的最大单个元组大小,以避免内存或其他资源的使用过量和不优化的表资源使用。

常见案例

当Java应用程序使用PreparedStatement批处理进行多行数据操作时,可能会遇到此问题。此外,如果提交多个表行时用批量更新插入语句,也可能导致此问题。

解决方法

解决此错误的一个有效方法是将每次操作的行数减少到服务器上的“max_total_cols”变量上的最小值。为了做到这一点,可以减少每次提交更新操作的行数,或使用其他行级协议如COM_STMT_EXECUTE替代批量更新插入语句。

除此之外,可以通过更改MySQL服务器上的“max_bulk_rows”和“max_total_cols”变量来改善问题,以允许更多的行数和列数,这将有助于减轻此问题。也可以修改文件中存储的最大行和列数值,以避免上述两个变量之一被再次修改,而造成更大的内存使用。

例如,在my.cnf中,添加以下行:

max_bulk_rows = 3000

max_total_cols = 20000

如果这些变量值设置得太高,则可能会影响表的性能,因为MySQL引擎需要在每次操作之间管理更多的空间,这可能会影响服务器的稳定性。例如,设置过高的变量值或超出内存限制可能会导致MySQL服务中断。

此外,为了在MySQL服务器上保持安全性和稳定性,可能需要监视服务器负载,并及时根据实际使用量调整这些变量的值以满足系统要求。因此,在修改变量值时,应先进行测试,确保更改后的值不会影响服务器的稳定性和它的性能。

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MySQL Error number: MY-013974; Symbol: ER_BULK_PARSER_ROW_BUFFER_MAX_TOTAL_COLS_EXCEEDED_LOG; SQLSTA

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