ektravel commented on code in PR #14752:
URL: https://github.com/apache/druid/pull/14752#discussion_r1286204064
##########
docs/operations/metrics.md:
##########
@@ -203,6 +203,14 @@ These metrics apply to the [Kinesis indexing
service](../development/extensions-
|`ingest/kinesis/avgLag/time`|Average lag time in milliseconds between the
current message sequence number consumed by the Kinesis indexing tasks and
latest sequence number in Kinesis across all shards. Minimum emission period
for this metric is a minute.|`dataSource`, `stream`, `tags`|Greater than 0, up
to max Kinesis retention period in milliseconds. |
|`ingest/kinesis/partitionLag/time`|Partition-wise lag time in milliseconds
between the current message sequence number consumed by the Kinesis indexing
tasks and latest sequence number in Kinesis. Minimum emission period for this
metric is a minute.|`dataSource`, `stream`, `partition`, `tags`|Greater than 0,
up to max Kinesis retention period in milliseconds. |
+### Compaction metrics
+
+These metrics are only reported by [compaction
tasks](../data-management/compaction.md).
+
+|Metric|Description|Dimensions| Normal value
|
+|------|-----------|----------|--------------------------------------------------------------------------------------------------------|
+|`compact/segmentAnalyzer/fetchAndProcessMillis`|Time taken to fetch and
process segments to infer the schema for the compaction task to
run.|`dataSource`, `taskId`, `taskType`, `groupId`,`tags`| Varies. A high value
indicates compaction tasks will speed up from explicitly setting the data
schema. |
Review Comment:
```suggestion
|`compact/segmentAnalyzer/fetchAndProcessMillis`|The time it takes to fetch
and process segments to infer the schema for the compaction task to
run.|`dataSource`, `taskId`, `taskType`, `groupId`,`tags`| Varies. A high value
indicates compaction tasks will speed up from explicitly setting the data
schema. |
```
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