慢查询日志，字段含义说明中少了对很多字段的解释说明，例如Commit_backoff_time、Backoff_types、Wait_prewrite_binlog_time、Resolve_lock_time、Rocksdb_delete_skipped_count、Rocksdb_key_skipped_count、Rocksdb_block_cache_hit_count等等
https://docs.pingcap.com/zh/tidb/stable/identify-slow-queries