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fix(mixin): Support OTel exporter batching #5618

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Merged
thampiotr merged 2 commits into from
Feb 23, 2026
+16 −9
Merged

fix(mixin): Support OTel exporter batching #5618

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be3fd4f
fix(mixin): Support OTel exporter batching
thampiotr Feb 20, 2026
9d6ed4c
mixin generate
thampiotr Feb 20, 2026
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17 changes: 12 additions & 5 deletions operations/alloy-mixin/dashboards/otel-engine-overview.libsonnet
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Original file line number Diff line number Diff line change
Expand Up @@ -421,13 +421,20 @@ local filename = 'alloy-otel-engine-overview.json';
// Row 2: Batching
(
panel.newHeatmap('Batch send size', 'short') +
panel.withDescription(
'Distribution of batch sizes when sent. Shows how full batches are before being flushed. ' + normalNote,
) +
panel.withDescription(|||
Distribution of batch sizes when sent. Works with both batching approaches:
the batch processor (processor/batch) and the exporter sending_queue batch (sending_queue.batch).
Whichever is active will populate this panel.
||| + normalNote) +
panelPosition3Across(row=12, col=0) +
panel.withQueries([
panel.newQuery(
// Both the batch processor and the exporter sending_queue emit a batch
// send size histogram. Typically only one is active, so we use "or" to
// show whichever has data. If both are active, exporter wins.
expr=|||
sum by (le) (increase(otelcol_exporter_queue_batch_send_size_bucket{%(groupSelector)s}[$__rate_interval]))
or
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sum by (le) (increase(otelcol_processor_batch_batch_send_size_bucket{%(groupSelector)s}[$__rate_interval]))
||| % $._config,
format='heatmap',
Expand All @@ -438,7 +445,7 @@ local filename = 'alloy-otel-engine-overview.json';
(
panel.new(title='Batch send triggers by ${groupby}', type='timeseries') +
panel.withDescription(
'How batches are flushed: by reaching the size limit or by timeout. Mostly timeout triggers may indicate low throughput or a large batch size setting. ' + normalNote,
'How batches are flushed: by reaching the size limit or by timeout. Mostly timeout triggers may indicate low throughput or a large batch size setting. Only available with the batch processor; the exporter sending_queue batch does not emit trigger metrics. ' + normalNote,
) +
panel.withUnit('cps') +
panelPosition3Across(row=12, col=1) +
Expand All @@ -460,7 +467,7 @@ local filename = 'alloy-otel-engine-overview.json';
(
panel.new(title='Batch metadata cardinality by ${groupby}', type='timeseries') +
panel.withDescription(
'Number of distinct metadata value combinations being processed. High cardinality increases memory usage and may hit the metadata_cardinality_limit. ' + normalNote,
'Number of distinct metadata value combinations being processed. High cardinality increases memory usage and may hit the metadata_cardinality_limit. Only available with the batch processor; the exporter sending_queue batch does not emit this metric. ' + normalNote,
) +
panelPosition3Across(row=12, col=2) +
panel.withQueries([
Expand Down
8 changes: 4 additions & 4 deletions operations/alloy-mixin/rendered/dashboards/alloy-otel-engine-overview.json
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Expand Up @@ -940,7 +940,7 @@
},
{
"datasource": "${datasource}",
"description": "Distribution of batch sizes when sent. Shows how full batches are before being flushed. Requires \"normal\" telemetry level.",
"description": "Distribution of batch sizes when sent. Works with both batching approaches:\nthe batch processor (processor/batch) and the exporter sending_queue batch (sending_queue.batch).\nWhichever is active will populate this panel.\nRequires \"normal\" telemetry level.",
"gridPos": {
"h": 10,
"w": 8,
Expand Down Expand Up @@ -976,7 +976,7 @@
"targets": [
{
"datasource": "${datasource}",
"expr": "sum by (le) (increase(otelcol_processor_batch_batch_send_size_bucket{cluster=~\"$cluster\", namespace=~\"$namespace\", job=~\"$job\"}[$__rate_interval]))\n",
"expr": "sum by (le) (increase(otelcol_exporter_queue_batch_send_size_bucket{cluster=~\"$cluster\", namespace=~\"$namespace\", job=~\"$job\"}[$__rate_interval]))\nor\nsum by (le) (increase(otelcol_processor_batch_batch_send_size_bucket{cluster=~\"$cluster\", namespace=~\"$namespace\", job=~\"$job\"}[$__rate_interval]))\n",
"format": "heatmap",
"instant": false,
"legendFormat": "{{le}}",
Expand All @@ -988,7 +988,7 @@
},
{
"datasource": "${datasource}",
"description": "How batches are flushed: by reaching the size limit or by timeout. Mostly timeout triggers may indicate low throughput or a large batch size setting. Requires \"normal\" telemetry level.",
"description": "How batches are flushed: by reaching the size limit or by timeout. Mostly timeout triggers may indicate low throughput or a large batch size setting. Only available with the batch processor; the exporter sending_queue batch does not emit trigger metrics. Requires \"normal\" telemetry level.",
"fieldConfig": {
"defaults": {
"unit": "cps"
Expand Down Expand Up @@ -1021,7 +1021,7 @@
},
{
"datasource": "${datasource}",
"description": "Number of distinct metadata value combinations being processed. High cardinality increases memory usage and may hit the metadata_cardinality_limit. Requires \"normal\" telemetry level.",
"description": "Number of distinct metadata value combinations being processed. High cardinality increases memory usage and may hit the metadata_cardinality_limit. Only available with the batch processor; the exporter sending_queue batch does not emit this metric. Requires \"normal\" telemetry level.",
"gridPos": {
"h": 10,
"w": 8,
Expand Down
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