Hi! I have set up a grafana dashboard that has the Log Cleaner metrics added when we upgraded to Apache Kafka 3.5. We didn’t have these metrics before when we were using Kafka 2.7. This Log Cleaner Metric max-buffer-utilization-percent is always 0%. The other log cleaner metrics like the Cleaner Recopy Percent and Max Clean Time seconds are fine, I see values on those, on the dashboard.
I think the metric should have some values > 0% as I see in the broker logs for log cleaner have values for Buffer utilization, for example:
Log cleaner thread 1 cleaned log topicv1-1 (dirty section = [1059352820, 1063420987]) 14,456.6 MB of log processed in 820.4 seconds (17.6 MB/sec). Indexed 362.6 MB in 13.9 seconds (26.2 Mb/sec, 1.7% of total time) **Buffer utilization: 36.3%** Cleaned 14,456.6 MB in 806.6 seconds (17.9 Mb/sec, 98.3% of total time) Start size: 14,456.6 MB (132,762,031 messages) End size: 14,289.2 MB (130,886,460 messages) 1.2% size reduction (1.4% fewer messages)
Does anyone have a dashboard set up with this metric and are you seeing metric values > 0% ?
Thank you!