Fix benchmark page query timeouts - #29
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The random-access summary and chart queries reached `open_mode` through `to_jsonb(r) ->> 'open_mode'`, and the compression-size summaries reached `uncompressed_bytes` through `to_jsonb(s) ->> 'uncompressed_bytes'`. That form was a bridge for databases that had not yet applied migrations 009 and 010, but `to_jsonb(r)` serializes the whole row. Every random-access row carries an `all_runtimes_ns` array with tens of thousands of samples (the benchmark records one entry per take for a 10 s time limit), so the summary serialized the entire table's sample arrays on every cache fill. On the production db.t4g.micro that statement now exceeds the 30 s `statement_timeout`, the group cache fill fails, and every landing-page render and `/api/groups` call dies with a server-side exception. Both migrations are applied in production, so read the columns directly. Locally, with 1000-sample arrays on a production-sized table, the random-access summary drops from 11.4 s to 0.2 s and the compression-size summary from 0.6 s to 0.3 s. Signed-off-by: Claude <noreply@anthropic.com> Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CFtMV8EAAHQM27PFzJjC4R
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robert3005
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Sep 8, 2026
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open_modeanduncompressed_bytesdirectly instead of converting whole rows to JSON. The previous queries serialized large runtime arrays and exceeded the 30-second PostgreSQL statement timeout, breaking the homepage and/api/groups. Migrations 009 and 010 are already applied in production. Validation: full CI checks, including PostgreSQL integration tests, plus a local production build and focused summary tests.