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Merge pull request #34160 from backstage/freben/catalog-metrics-cache

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fix(catalog-backend): cache and cheapen catalog_entities_count metric
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Fredrik Adelöw
2026-05-08 14:51:08 +03:00
committed by GitHub
parent 594de037f1 8f7f591c46
commit 95f31b18ec
3 changed files with 276 additions and 23 deletions
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'@backstage/plugin-catalog-backend': patch
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Improved the performance of the `catalog_entities_count` metric.
The legacy Prometheus and OpenTelemetry observable gauges previously each ran their own copy of the per-kind count query against the `search` table on every metrics scrape. On large catalogs this could pile up faster than the queries completed, contending for buffers and stalling the database.
The two callbacks now share a single query result with a short in-process TTL cache, and the underlying query reads from `final_entities` instead of `search`, avoiding the bitmap heap scans that dominated the previous form. The emitted labels and values are unchanged.