mysql内存设置，首先要知道当前的设置
MySQL [(none)]> show variables like ‘%buffer%‘; +-------------------------------------+----------------+ | Variable_name | Value | +-------------------------------------+----------------+ | bulk_insert_buffer_size | 8388608 | | innodb_buffer_pool_chunk_size | 33554432 | | innodb_buffer_pool_dump_at_shutdown | ON | | innodb_buffer_pool_dump_now | OFF | | innodb_buffer_pool_dump_pct | 25 | | innodb_buffer_pool_filename | ib_buffer_pool | | innodb_buffer_pool_instances | 1 | | innodb_buffer_pool_load_abort | OFF | | innodb_buffer_pool_load_at_startup | ON | | innodb_buffer_pool_load_now | OFF | | innodb_buffer_pool_size | 67108864 | | innodb_change_buffer_max_size | 25 | | innodb_change_buffering | all | | innodb_log_buffer_size | 16777216 | | innodb_sort_buffer_size | 1048576 | | join_buffer_size | 262144 | | key_buffer_size | 8388608 | | myisam_sort_buffer_size | 8388608 | | net_buffer_length | 16384 | | preload_buffer_size | 32768 | | read_buffer_size | 131072 | | read_rnd_buffer_size | 262144 | | sort_buffer_size | 262144 | | sql_buffer_result | OFF | +-------------------------------------+----------------+
想改哪个直接配置到my.cnf中即可
原文：https://www.cnblogs.com/barneywill/p/11279597.html