启动多个MySQL实例
为了便于测试和最后的部署可能都需要用到多MySQL实例，这里记录一下操作的方法，首先初始化两个MySQL数据目录
mysql_install_db --user=mysql --datadir=/var/lib/mysql/3306/ mysql_install_db --user=mysql --datadir=/var/lib/mysql/3307/然后使用类似以下的配置文件，由于只需要使用Blackhole Engine，大多参数也无太大意义，设置小一些反而节约一些资源
[mysqld_multi] mysqld = /usr/bin/mysqld_safe mysqladmin = /usr/bin/mysqladmin [mysqld3306] port = 3306 socket = /var/lib/mysql/3306/mysqld.sock datadir = /var/lib/mysql/3306 key_buffer_size = 16 Mmax_allowed_packet = 1M table_open_cache = 64 sort_buffer_size = 512K net_buffer_length = 8K read_buffer_size = 256K read_rnd_buffer_size = 512K myisam_sort_buffer_size = 8M log-bin=mysql-bin binlog_format=mixed server-id = 3306 innodb_data_file_path = ibdata1:10M:autoextend innodb_buffer_pool_size = 16M innodb_additional_mem_pool_size = 2M innodb_log_file_size = 5M innodb_log_buffer_size = 8M innodb_flush_log_at_trx_commit = 2 innodb_lock_wait_timeout = 50 [mysqld3307] port = 3307 socket = /var/lib/mysql/3307/mysqld.sock datadir = /var/lib/mysql/3307 key_buffer_size = 16 Mmax_allowed_packet = 1M table_open_cache = 64 sort_buffer_size = 512K net_buffer_length = 8K read_buffer_size = 256K read_rnd_buffer_size = 512K myisam_sort_buffer_size = 8M log-bin=mysql-bin binlog_format=mixed server-id = 3307 innodb_data_file_path = ibdata1:10M:autoextend innodb_buffer_pool_size = 16M innodb_additional_mem_pool_size = 2M innodb_log_file_size = 5M innodb_log_buffer_size = 8M innodb_flush_log_at_trx_commit = 2 innodb_lock_wait_timeout = 50启动多实例的方法如下，启动两个实例
mysqld_multi start 3306 mysqld_multi start 3307
时间： 2024-07-30 13:46:20