事务两阶段提交中第一阶段(prewrite 阶段)的耗时

id task estRows operator info actRows execution info memory disk Insert_1 root 0 N/A 0 time:69.5μs, loops:1, prepare: 36.3μs, insert:33.2μs,
commit_txn: {prewrite:2.02s, slowest_prewrite_rpc: {total: 2.020s, region_id: 111019779, store: 10.0.47.24:20160,
tikv_wall_time: 1.48s, scan_detail: {get_snapshot_time: 5.07μs, rocksdb: {block: {cache_hit_count: 14}}}, write_detail:
{store_batch_wait: 15.8μs, propose_send_wait: 0s, persist_log: {total: 211.4μs, write_leader_wait: 47.5μs, sync_log: 109.2μs, write_memtable: 2.15μs},
commit_log: 1.46s, apply_batch_wait: 15.6μs, apply: {total:473.5μs, mutex_lock: 0s, write_leader_wait: 157.8μs, write_wal: 0s, write_memtable: 133.6μs}}},
region_num:1, write_keys:2, write_byte:7925} 8.66 KB N/A

以上是执行计划的具体耗时,看时间主要耗时在tikv_wall_time: 1.48s 这块的监控图主要要哪里找?