maytasm commented on a change in pull request #10510:
URL: https://github.com/apache/druid/pull/10510#discussion_r504335390



##########
File path: docs/operations/metrics.md
##########
@@ -222,13 +222,25 @@ These metrics are for the Druid Coordinator and are reset 
each time the Coordina
 |`segment/dropQueue/count`|Number of segments to drop.|server.|Varies.|
 |`segment/size`|Total size of used segments in a data source. Emitted only for 
data sources to which at least one used segment belongs.|dataSource.|Varies.|
 |`segment/count`|Number of used segments belonging to a data source. Emitted 
only for data sources to which at least one used segment belongs.|dataSource.|< 
max|
-|`segment/overShadowed/count`|Number of overshadowed segments.||Varies.|
+|`segment/overShadowed/count`|Number of overshadowed segments.| |Varies.|
 |`segment/unavailable/count`|Number of segments (not including replicas) left 
to load until segments that should be loaded in the cluster are available for 
queries.|dataSource.|0|
 |`segment/underReplicated/count`|Number of segments (including replicas) left 
to load until segments that should be loaded in the cluster are available for 
queries.|tier, dataSource.|0|
 |`tier/historical/count`|Number of available historical nodes in each 
tier.|tier.|Varies.|
 |`tier/replication/factor`|Configured maximum replication factor in each 
tier.|tier.|Varies.|
 |`tier/required/capacity`|Total capacity in bytes required in each 
tier.|tier.|Varies.|
 |`tier/total/capacity`|Total capacity in bytes available in each 
tier.|tier.|Varies.|
+|`compact/task/count`|Number of task issued in the auto compaction run.| 
|Varies.|
+|`compactTask/maxSlot/count`|Number of max task slot that can be used for auto 
compaction tasks in the auto compaction run.| |Varies.|
+|`compactTask/availableSlot/count`|Number of available task slot that can be 
used for auto compaction tasks in the auto compaction run. (this is max slot 
minus any currently running compaction task)| |Varies.|
+|`segment/waitCompact/bytes`|Total byte of this datasource waiting to be 
compacted by the auto compaction (only consider intervals/segments that is 
eligible for auto compaction).|datasource.|Varies.|
+|`segment/waitCompact/count`|Total number of segments of this datasource 
waiting to be compacted by the auto compaction (only consider 
intervals/segments that is eligible for auto compaction).|datasource.|Varies.|
+|`interval/waitCompact/count`|Total number of intervals of this datasource 
waiting to be compacted by the auto compaction (only consider 
intervals/segments that is eligible for auto compaction).|datasource.|Varies.|
+|`segment/compacted/bytes`|Total byte of this datasource that is already 
compacted with the spec set in the auto compaction config.|datasource.|Varies.|

Review comment:
       Done




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