ON DUPLICATE KEY UPDATE 插入慢

id      	task	estRows	operator info	actRows	execution info                                                                                                                                                                                                                                                                                                                                                                                                                                                                     	memory 	disk
Insert_1	root	0      	N/A          	0      	time:1.01s, loops:1, prepare: 934.3ms, check_insert: {total_time: 73.1ms, mem_insert_time: 152.9µs, prefetch: 73ms, rpc:{BatchGet:{num_rpc:3, total_time:77.7ms}, total_wait_time: 77ms, scan_detail: {total_process_keys: 4, total_process_keys_size: 886, total_keys: 6, rocksdb: {delete_skipped_count: 0, key_skipped_count: 0, block: {cache_hit_count: 63, read_count: 1, read_byte: 4.80 KB}}}}}, commit_txn: {prewrite:2.67ms, region_num:2, write_keys:6, write_byte:887}	6.67 KB	N/A