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new a3a2a5e637d Clarify `compactTask/availableSlot/count` metric
description (#18663)
a3a2a5e637d is described below
commit a3a2a5e637d85741801933118a767e0f77ee4fdb
Author: Abhishek Radhakrishnan <[email protected]>
AuthorDate: Mon Nov 3 17:47:09 2025 -0800
Clarify `compactTask/availableSlot/count` metric description (#18663)
Clarify the compactTask/availableSlot/count metric description.
---
docs/operations/metrics.md | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/docs/operations/metrics.md b/docs/operations/metrics.md
index 0ccb5f806a1..a17e10c6299 100644
--- a/docs/operations/metrics.md
+++ b/docs/operations/metrics.md
@@ -413,7 +413,7 @@ These metrics are emitted by the Druid Coordinator in every
run of the correspon
|`tier/total/capacity`|Total capacity in bytes available in each
tier.|`tier`|Varies|
|`compact/task/count`|Number of tasks issued in the auto compaction run.|
|Varies|
|`compactTask/maxSlot/count`|Maximum number of task slots available for auto
compaction tasks in the auto compaction run.| |Varies|
-|`compactTask/availableSlot/count`|Number of available task slots that can be
used for auto compaction tasks in the auto compaction run. This is the max
number of task slots minus any currently running compaction tasks.| |Varies|
+|`compactTask/availableSlot/count`|Number of currently vacant task slots out
of the total slots allocated for auto compaction tasks. This value is computed
as the difference between the total number of task slots allocated for auto
compaction and the estimated number of task slots currently occupied by running
compaction tasks. The number of sub-tasks of each compaction task is estimated
to be `maxNumConcurrentSubTasks`.| |Varies|
|`killTask/availableSlot/count`| Number of available task slots that can be
used for auto kill tasks in the auto kill run. This is the max number of task
slots minus any currently running auto kill tasks.
[...]
|`killTask/maxSlot/count`| Maximum number of task slots available for auto
kill tasks in the auto kill run.
[...]
|`kill/task/count`| Number of tasks issued in the auto kill run.
[...]
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