- options.write_buffer_size changes from 4MB to 64MB
- options.target_file_size_base changes from 2MB to 64MB
- options.max_bytes_for_level_base changes from 10MB to 256MB
- options.soft_pending_compaction_bytes_limit changes from 0 (disabled) to 64GB
- options.hard_pending_compaction_bytes_limit changes from 0 (disabled) to 256GB
- table_cache_numshardbits changes from 4 to 6
- max_file_opening_threads changes from 1 to 16