请问profile中ScannerInitTime代表什么

            Pipeline  :2    (host=TNetworkAddress(hostname:192.168.183.145,  port:9050)):
                PipelineTask  (index=1):(ExecTime:  13sec603ms)
                      -  CoreChangeTimes:  1
                      -  ExecuteTime:  6sec801ms
                          -  CloseTime:  427.198us
                          -  GetBlockTime:  118.170us
                          -  OpenTime:  6sec800ms
                          -  PrepareTime:  115.941us
                          -  SinkTime:  423.35us
                      -  GetBlockCounter:  6
                      -  NumScheduleTimes:  5
                      -  NumYieldTimes:  0
                      -  TaskCpuTime:  5.376ms
                      -  WaitWorkerTime:  141.645us
                    LOCAL_EXCHANGE_SINK_OPERATOR  (PASSTHROUGH)  (id=-2):(ExecTime:  423.538us)
                          -  CloseTime:  0ns
                          -  ComputeHashValueTime:  0ns
                          -  DistributeDataTime:  0ns
                          -  ExecTime:  423.538us
                          -  InitTime:  1.677us
                          -  InputRows:  226
                          -  MemoryUsage:  
                              -  PeakMemoryUsage:  0.00  
                          -  OpenTime:  1.192us
                          -  PendingFinishDependency:  0ns
                          -  WaitForDependency[LOCAL_EXCHANGE_SINK_DEPENDENCY]Time:  0ns
                        OLAP_SCAN_OPERATOR  (id=0.  nereids_id=608.  table  name  =  analysis_date_category_merchant(analysis_date_category_merchant)):(ExecTime:  6sec841ms)
                              -  RuntimeFilters:  :  
                              -  PushDownPredicates:  [{category_id  IN  [1]},  {analysis_date  >=  [2024-12-27]},  {analysis_date  <=  [2025-01-02]},  {__DORIS_DELETE_SIGN__  IN  [0]}]
                              -  KeyRanges:  ScanKeys:
                              -  TabletIds:  [3521375,  3521377,  3521391]
                              -  UseSpecificThreadToken:  False
                              -  AcquireRuntimeFilterTime:  472ns
                              -  BlocksProduced:  3
                              -  CloseTime:  424.88us
                              -  ExecTime:  6sec841ms
                              -  InitTime:  72.314us
                              -  KeyRangesNum:  0
                              -  MaxScannerThreadNum:  3
                              -  MemoryUsage:  
                                  -  PeakMemoryUsage:  0.00  
                              -  NumScanners:  3
                              -  OpenTime:  6sec800ms
                              -  ProcessConjunctTime:  78.411us
                              -  ProjectionTime:  0ns
                              -  RowsProduced:  226
                              -  RowsRead:  226
                              -  RuntimeFilterInfo:  
                              -  ScannerWorkerWaitTime:  214.28us
                              -  TabletNum:  3
                              -  TotalReadThroughput:  0
                              -  WaitForDependency[OLAP_SCAN_OPERATOR_DEPENDENCY]Time:  39.533ms
                              -  WaitForRuntimeFilter:  0ns
                            VScanner:
                                  -  ReadColumns:  [analysis_date,  category_id,  merchant_user_id,  transaction_money,  deal_money,  recharge_money,  __DORIS_DELETE_SIGN__]
                                  -  PreEvaluatePredicates:  
ComparisonPredicateBase(STRING,  EQ),  column_id=2,  opposite=false
ComparisonPredicateBase(STRING,  GE),  column_id=1,  opposite=false
ComparisonPredicateBase(TINYINT,  EQ),  column_id=17,  opposite=false
                                  -  PerScannerRunningTime:  [36.276ms,  37.779ms,  36.944ms,  ]
                                  -  PerScannerRowsRead:  [72,  83,  71,  ]
                                  -  PerScannerWaitTime:  [66.559us,  44.731us,  102.738us,  ]
                                  -  PerScannerProjectionTime:  [92.035us,  50.889us,  66.568us,  ]
                                  -  BlockConvertTime:  0ns
                                  -  BlockFetchTime:  116.966us
                                  -  DeleteBitmapGetAggTime:  352.657us
                                  -  MemoryUsage:  
                                      -  FreeBlocks:  17.00  KB
                                  -  NewlyCreateFreeBlocksNum:  6
                                  -  NumScaleUpScanners:  0
                                  -  ReaderInitTime:  5.698ms
                                  -  RowsDelFiltered:  96
                                  -  ScannerBatchWaitTime:  0ns
                                  -  ScannerConvertBlockTime:  0ns
                                  -  ScannerCpuTime:  17.556ms
                                  -  ScannerCtxSchedTime:  155.148us
                                  -  ScannerFilterTime:  26.590us
                                  -  ScannerGetBlockTime:  110.684ms
                                  -  ScannerInitTime:  6sec800ms
                                  -  ScannerSchedCount:  3
                                  -  SyncRowsetTime:  2.403ms