Parallel Replicas

```
┌─hostname()───────────────────────┬─event──────────────────────────────────────────┬─value─┬─description──────────────────────────────────────────────────────────────────────────────────────────┐
│ c-crimson-vd-86-server-rdhnsx3-0 │ ParallelReplicasHandleRequestMicroseconds      │   438 │ Time spent processing requests for marks from replicas                                               │
│ c-crimson-vd-86-server-rdhnsx3-0 │ ParallelReplicasHandleAnnouncementMicroseconds │   558 │ Time spent processing replicas announcements                                                         │
│ c-crimson-vd-86-server-rdhnsx3-0 │ ParallelReplicasReadUnassignedMarks            │   240 │ Sum across all replicas of how many unassigned marks were scheduled                                  │
│ c-crimson-vd-86-server-rdhnsx3-0 │ ParallelReplicasReadAssignedForStealingMarks   │     4 │ Sum across all replicas of how many of scheduled marks were assigned for stealing by consistent hash │
│ c-crimson-vd-86-server-rdhnsx3-0 │ ParallelReplicasStealingByHashMicroseconds     │     5 │ Time spent collecting segments meant for stealing by hash                                            │
│ c-crimson-vd-86-server-rdhnsx3-0 │ ParallelReplicasProcessingPartsMicroseconds    │     5 │ Time spent processing data parts                                                                     │
│ c-crimson-vd-86-server-rdhnsx3-0 │ ParallelReplicasStealingLeftoversMicroseconds  │     3 │ Time spent collecting orphaned segments                                                              │
│ c-crimson-vd-86-server-rdhnsx3-0 │ ParallelReplicasUsedCount                      │     2 │ Number of replicas used to execute a query with task-based parallel replicas                         │
│ c-crimson-vd-86-server-rdhnsx3-0 │ ParallelReplicasAvailableCount                 │     6 │ Number of replicas available to execute a query with task-based parallel replicas                    │
└──────────────────────────────────┴────────────────────────────────────────────────┴───────┴──────────────────────────────────────────────────────────────────────────────────────────────────────┘
┌─hostname()───────────────────────┬─event──────────────────────────────────────────┬─value─┬─description──────────────────────────────────────────────────────────────────────────────────────────┐
│ c-crimson-vd-86-server-e9kp5f0-0 │ ParallelReplicasHandleRequestMicroseconds      │   698 │ Time spent processing requests for marks from replicas                                               │
│ c-crimson-vd-86-server-e9kp5f0-0 │ ParallelReplicasHandleAnnouncementMicroseconds │   644 │ Time spent processing replicas announcements                                                         │
│ c-crimson-vd-86-server-e9kp5f0-0 │ ParallelReplicasReadUnassignedMarks            │   190 │ Sum across all replicas of how many unassigned marks were scheduled                                  │
│ c-crimson-vd-86-server-e9kp5f0-0 │ ParallelReplicasReadAssignedForStealingMarks   │    54 │ Sum across all replicas of how many of scheduled marks were assigned for stealing by consistent hash │
│ c-crimson-vd-86-server-e9kp5f0-0 │ ParallelReplicasStealingByHashMicroseconds     │     8 │ Time spent collecting segments meant for stealing by hash                                            │
│ c-crimson-vd-86-server-e9kp5f0-0 │ ParallelReplicasProcessingPartsMicroseconds    │     4 │ Time spent processing data parts                                                                     │
│ c-crimson-vd-86-server-e9kp5f0-0 │ ParallelReplicasStealingLeftoversMicroseconds  │     2 │ Time spent collecting orphaned segments                                                              │
│ c-crimson-vd-86-server-e9kp5f0-0 │ ParallelReplicasUsedCount                      │     2 │ Number of replicas used to execute a query with task-based parallel replicas                         │
│ c-crimson-vd-86-server-e9kp5f0-0 │ ParallelReplicasAvailableCount                 │     6 │ Number of replicas available to execute a query with task-based parallel replicas                    │
└──────────────────────────────────┴────────────────────────────────────────────────┴───────┴──────────────────────────────────────────────────────────────────────────────────────────────────────┘
┌─hostname()───────────────────────┬─event──────────────────────────────────────────┬─value─┬─description──────────────────────────────────────────────────────────────────────────────────────────┐
│ c-crimson-vd-86-server-ybtm18n-0 │ ParallelReplicasHandleRequestMicroseconds      │   620 │ Time spent processing requests for marks from replicas                                               │
│ c-crimson-vd-86-server-ybtm18n-0 │ ParallelReplicasHandleAnnouncementMicroseconds │   656 │ Time spent processing replicas announcements                                                         │
│ c-crimson-vd-86-server-ybtm18n-0 │ ParallelReplicasReadUnassignedMarks            │     1 │ Sum across all replicas of how many unassigned marks were scheduled                                  │
│ c-crimson-vd-86-server-ybtm18n-0 │ ParallelReplicasReadAssignedForStealingMarks   │     1 │ Sum across all replicas of how many of scheduled marks were assigned for stealing by consistent hash │
│ c-crimson-vd-86-server-ybtm18n-0 │ ParallelReplicasStealingByHashMicroseconds     │     4 │ Time spent collecting segments meant for stealing by hash                                            │
│ c-crimson-vd-86-server-ybtm18n-0 │ ParallelReplicasProcessingPartsMicroseconds    │     3 │ Time spent processing data parts                                                                     │
│ c-crimson-vd-86-server-ybtm18n-0 │ ParallelReplicasStealingLeftoversMicroseconds  │     1 │ Time spent collecting orphaned segments                                                              │
│ c-crimson-vd-86-server-ybtm18n-0 │ ParallelReplicasUsedCount                      │     2 │ Number of replicas used to execute a query with task-based parallel replicas                         │
│ c-crimson-vd-86-server-ybtm18n-0 │ ParallelReplicasAvailableCount                 │    12 │ Number of replicas available to execute a query with task-based parallel replicas                    │
└──────────────────────────────────┴────────────────────────────────────────────────┴───────┴──────────────────────────────────────────────────────────────────────────────────────────────────────┘
┌─hostname()───────────────────────┬─event──────────────────────────────────────────┬─value─┬─description──────────────────────────────────────────────────────────────────────────────────────────┐
│ c-crimson-vd-86-server-16j1ncj-0 │ ParallelReplicasHandleRequestMicroseconds      │   696 │ Time spent processing requests for marks from replicas                                               │
│ c-crimson-vd-86-server-16j1ncj-0 │ ParallelReplicasHandleAnnouncementMicroseconds │   717 │ Time spent processing replicas announcements                                                         │
│ c-crimson-vd-86-server-16j1ncj-0 │ ParallelReplicasReadUnassignedMarks            │     2 │ Sum across all replicas of how many unassigned marks were scheduled                                  │
│ c-crimson-vd-86-server-16j1ncj-0 │ ParallelReplicasReadAssignedForStealingMarks   │     2 │ Sum across all replicas of how many of scheduled marks were assigned for stealing by consistent hash │
│ c-crimson-vd-86-server-16j1ncj-0 │ ParallelReplicasStealingByHashMicroseconds     │    10 │ Time spent collecting segments meant for stealing by hash                                            │
│ c-crimson-vd-86-server-16j1ncj-0 │ ParallelReplicasProcessingPartsMicroseconds    │     6 │ Time spent processing data parts                                                                     │
│ c-crimson-vd-86-server-16j1ncj-0 │ ParallelReplicasStealingLeftoversMicroseconds  │     2 │ Time spent collecting orphaned segments                                                              │