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KAFKA-20919: Document KIP-1301 group coordinator metrics changes #23129

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chia7712 merged 2 commits into from
Aug 20, 2026
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KAFKA-20919: Document KIP-1301 group coordinator metrics changes #23129

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a3210d7
KAFKA-20919: Document KIP-1301 group coordinator metrics changes
squah-confluent Aug 11, 2026
556ccd4
fixup: fix (classic|consumer|streams)-group-count tag capitalization
squah-confluent Aug 18, 2026
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44 changes: 35 additions & 9 deletions docs/operations/monitoring.md
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Original file line number Diff line number Diff line change
Expand Up @@ -1274,7 +1274,7 @@ Consumer Group Count, per state
</td>
<td>

kafka.server:type=group-coordinator-metrics,name=consumer-group-count,state=[empty|assigning|reconciling|stable|dead]
kafka.server:type=group-coordinator-metrics,name=consumer-group-count,state=[Empty|Assigning|Reconciling|Stable|Dead]
</td>
<td>

Expand Down Expand Up @@ -1313,11 +1313,11 @@ Streams Group Count, per state
</td>
<td>

kafka.server:type=group-coordinator-metrics,name=streams-group-count,state=[empty|not_ready|assigning|reconciling|stable|dead]
kafka.server:type=group-coordinator-metrics,name=streams-group-count,state=[Empty|NotReady|Assigning|Reconciling|Stable|Dead]
</td>
<td>

Total number of Streams Groups in each state: Empty, Not Ready, Assigning, Reconciling, Stable, Dead
Total number of Streams Groups in each state: Empty, NotReady, Assigning, Reconciling, Stable, Dead
</td> </tr>
<tr>
<td>
Expand Down Expand Up @@ -1556,28 +1556,41 @@ The total number of groups found eligible for plugin-state deletion by the clean
<tr>
<td>

Classic Group Count
Classic Group Count (deprecated)
</td>
<td>

kafka.server:type=GroupMetadataManager,name=NumGroups
</td>
<td>

Total number of Classic Groups
Total number of Classic Groups. Deprecated: use group-count with protocol=classic instead
</td> </tr>
<tr>
<td>

Classic Group Count, per State
Classic Group Count, per State (deprecated)
</td>
<td>

kafka.server:type=GroupMetadataManager,name=NumGroups[PreparingRebalance,CompletingRebalance,Empty,Stable,Dead]
</td>
<td>

The number of Classic Groups in each state: PreparingRebalance, CompletingRebalance, Empty, Stable, Dead
The number of Classic Groups in each state: PreparingRebalance, CompletingRebalance, Empty, Stable, Dead. Deprecated: use classic-group-count instead
</td> </tr>
<tr>
<td>

Classic Group Count, per state
</td>
<td>

kafka.server:type=group-coordinator-metrics,name=classic-group-count,state=[Empty|PreparingRebalance|CompletingRebalance|Stable|Dead]
</td>
<td>

Total number of Classic Groups in each state: Empty, PreparingRebalance, CompletingRebalance, Stable, Dead
</td> </tr>
<tr>
<td>
Expand Down Expand Up @@ -1608,15 +1621,28 @@ The total number of classic group completed rebalances
<tr>
<td>

Group Offset Count
Group Offset Count (deprecated)
</td>
<td>

kafka.server:type=GroupMetadataManager,name=NumOffsets
</td>
<td>

Total number of committed offsets for Classic and Consumer Groups
Total number of committed offsets for Classic and Consumer Groups. Deprecated: use offset-count instead
</td> </tr>
<tr>
<td>

Group Offset Count
</td>
<td>

kafka.server:type=group-coordinator-metrics,name=offset-count
</td>
<td>

The number of offsets currently retained for Classic, Consumer and Streams Groups
</td> </tr>
<tr>
<td>
Expand Down
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