What Parameters Should I Pay Attention to When Creating a DB Instance?

If you use a custom parameter template when creating a DB instance, the following specification-related parameters in the custom template are not applied. Instead, the default values are used.

• innodb_buffer_pool_size
• innodb_log_buffer_size
• max_connections
• innodb_buffer_pool_instances
• innodb_page_cleaners
• innodb_parallel_read_threads
• innodb_read_io_threads
• innodb_write_io_threads
• threadpool_size

The value of innodb_parallel_select_count is determined by your instance specifications, instead of the parameter value you configured in the parameter template. The default value is OFF for instance with 16 vCPUs or less and ON for instances with more than 16 vCPUs.