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fix(hl-history): raise staleness threshold to 2h #1934

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Merged
Flotapponnier merged 1 commit into from
Aug 13, 2026
+3 −1
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fix(hl-history): raise staleness threshold to 2h #1934

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4 changes: 3 additions & 1 deletion src/lib/hl-builder-stats.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -779,7 +779,9 @@ function toCompactFrontend(
* unstable_cache TTL is 1h rather than 60 s — no need to fan out
* 20 range queries against Prom on every ISR cycle. */
async function fetchHlHistoryRaw(): Promise<HlHistorySummary | null> {
const snapshot = await readCohortSnapshot<HlHistorySummary>(HL_HISTORY_KEY);
// 2h: history is daily-stepped data, 10-min default is too aggressive and
// causes unnecessary 200-query Prom rebuilds on every staleness window.
const snapshot = await readCohortSnapshot<HlHistorySummary>(HL_HISTORY_KEY, 2 * 60 * 60 * 1000);
if (snapshot) return snapshot.data;
const fresh = await fetchHlHistoryFresh();
if (fresh) {
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