feat(stats): query time histogram in OpenMetrics and OTLP - #1450

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alexkarp-umd wants to merge 22 commits into

pgdogdev:mainfrom

alexkarp-umd:metrics/query-time-histogram

Commits on Aug 7, 2026

use serde_repr to strictly type SumAggregationTemporality
KennanHunter
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2d44371
case-insensitive parse out OTEL_EXPORTER_OTLP_METRICS_TEMPORALITY_PREFERENCE in both [otel] section and env var form
KennanHunter
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3478261
return data points according to temporality
KennanHunter
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fed5e14
return start_time_unix_nano with otel counters and sum
KennanHunter
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9a46c79
use explicit OpenMetricType enum instead of magic strings
KennanHunter
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c838155
flatten and extract helpers to make relationship between OpenMetricType
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9132134
Update JSON schema
KennanHunter
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d63fad7
test OtelTemporalityPreference to make codecov happy
KennanHunter
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5d59018
otel: default temporality by datadog presence and centralize warning
KennanHunter
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1ced1c3
add pgdog-jsonschema line to CONTRIBUTING.md
KennanHunter
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3c3d165
update 9918e9 to use typed OpenMetricType
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74dfe77
otel: derive effective temporality at read time
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81dc14f

Commits on Aug 13, 2026

rename SumAggregationTemporality to AggregationTemporality
KennanHunter
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92ddcf3

Commits on Aug 21, 2026

feat(stats): record query latency in a fixed-bucket histogram
alexkarp-umd
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dc639b8
feat(stats): expose query time histogram on the OpenMetrics endpoint
alexkarp-umd
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b1d7d25
feat(stats): export query time histogram over OTLP
alexkarp-umd
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24c8e90
stats: debug-assert metric type matches its measurements
alexkarp-umd
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e7c7f02
perf(stats): share histogram bounds allocation across pools and exporters

alexkarp-umd
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claude
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fbe70ba
fix(stats): address review feedback on the query time histogram

alexkarp-umd
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claude
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d6bdb16
fix(stats): refuse a query_time_buckets ladder PgDog can't use

alexkarp-umd
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claude
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1cd6d64
refactor(stats): trim dead code from the query time histogram

alexkarp-umd
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claude
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4ace29e
test(stats): cover the latch conflict remedies

alexkarp-umd
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claude
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a21bb2f