momo-jun commented on code in PR #15447:
URL: https://github.com/apache/pulsar/pull/15447#discussion_r866467164
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site2/docs/reference-metrics.md:
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@@ -117,6 +117,34 @@ The following metrics are available for broker:
- [Pulsar SQL Worker](#pulsar-sql-worker)
- [Pulsar transaction](#pulsar-transaction)
+### Broker metrics
+All the broker metrics are labelled with the following labels:
+- cluster: cluster=${pulsar_cluster}. ${pulsar_cluster} is the cluster name
that you have configured in the `broker.conf` file.
+
+| Name | Type | Description |
+|---|---|---|
+| pulsar_ml_cache_evictions | Gauge | The number of cache evictions during
the last minute. |
+| pulsar_ml_cache_hits_rate | Gauge | The number of cache hits per second on
the broker side. |
+| pulsar_ml_cache_hits_throughput | Gauge | The amount of data is retrieved
from the cache on the broker side (in byte/s). |
+| pulsar_ml_cache_misses_rate | Gauge | The number of cache misses per second
on the broker side. |
+| pulsar_ml_cache_misses_throughput | Gauge | The amount of data is not
retrieved from the cache on the broker side (in byte/s). |
+| pulsar_ml_cache_pool_active_allocations | Gauge | The number of currently
active allocations in direct arena |
+| pulsar_ml_cache_pool_active_allocations_huge | Gauge | The number of
currently active huge allocation in direct arena |
+| pulsar_ml_cache_pool_active_allocations_normal | Gauge | The number of
currently active normal allocations in direct arena |
+| pulsar_ml_cache_pool_active_allocations_small | Gauge | The number of
currently active small allocations in direct arena |
+| pulsar_ml_cache_pool_allocated | Gauge | The total allocated memory of
chunk lists in direct arena |
Review Comment:
```suggestion
| pulsar_ml_cache_pool_allocated | Gauge | The total allocated memory of
chunk lists in direct arena. |
```
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