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Jinwoo Hong
10bea3a8fa
* feat(relay): report lane service times, 503 causes, per-site hold p99 and lock-wait split Adds the step-1 observability: drain-return and sticky slot service times, every /v1/assign 503 by cause with a non-drain total, a p99 per lock hold site (drain-return regional rows get their own site), a director-side pg_stat_activity sample that splits lock waiters by director vs cell, and a log line for each reserved_requests drift reconciliation corrects. Log-based metrics for the new fields are declared in Terraform, not applied. * fix(relay): classify a lock waiter by the first relay table its statement names * fix(relay): attribute lock waiters to the root holder; document the director hold alert change Every waiter after the first in a row-lock convoy is blocked by the first waiter, so the sample now walks pg_blocking_pids to the root, reading it once per waiter. The sampler is single-flight. Drain-return regional holds feeding the non-paging director hold policy is documented as expected. * docs(relay): note the lock-wait sample undercounts director waiters when the pool is full