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  v0.27.0 — RETAIN_PREVIOUS_PATCH Stable

  joeyr released this 2026-08-10 21:02:59 -05:00 | 33 commits to main since this release

  Added

  • RETAIN_PREVIOUS_PATCH=false narrows retention to the current patch.

    The default is unchanged (true, the two-patch window README describes), so
    nothing moves for a deployment that does not set it.

    It is one flag with two effects, and they cannot be separated: it sets the
    window pruneToPatches enforces AND whether previousPatch reaches the
    damage and benchmarks builders as their thin-sample fallback. Pruning the rows
    while still naming the predecessor would publish
    generatedFrom.previousPatch: "16.14" over four queries that return nothing —
    provenance for a fallback that cannot fire. runRiotWindow binds it once, as
    retained, and everything downstream reads that rather than the parameter.

    What switching it off costs is one morning per patch: on rollover, a champion
    or role with no rows yet on the new patch is omitted from damage and
    benchmarks instead of being served from the previous patch flagged stale.
    Only those two artifacts have a fallback to lose — counters, runes, synergies
    and builds are current-patch-only either way — and neither data/archive nor
    the brotli'd published payloads are pruned under either setting.

    It also forgets the previous patch's seen_match ids, so rollover morning
    re-fetches some matches it already knows are off-patch and discards them
    again. Bounded, and once per patch.

    The deployed stack sets it, alongside a crawl window widened from three hours
    to six: 6-hour nights collect roughly twice the rows, and holding two patches
    of that on the shared Postgres is ~1M participant_stat rows. The wider
    window is also what makes the trade cheap — most champion-roles now have rows
    by the first morning, so the fallback rarely fires at all.

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