MySQL configuration parameter [tmp_table_size] method: first check [tmp_table_size]; then set [tmp_table_size]; finally add [tmp_table_size] under mysqld in the MySQL configuration file [my.cnf].
tmp_table_size The memory cache size of the temporary tableThe temporary table refers to the temporary data table generated when sql is executed##More related free learning recommendations: mysql tutorial(Video)
# tmp_table_size 默认值 16777216 最小值 1 最大值 18446744073709551615 // 单位字节 默认值也就是16M多
max_heap_table_size parameter in MySQL will affect the memory cache size of the temporary table.
show global status like 'Created_tmp_disk_tables'; show global status like 'Created_tmp_tables'; Created_tmp_disk_tables : 磁盘临时表的数量 Created_tmp_tables : 内存临时表的数量
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