bvandeusenandClaude Opus 5.5
385a579afe
Measured on dev (f802c9f): every dropped ingest carried samples=21,
metric_rows≈4,200 and never finished the INSERT flush inside the agent's
10 s ("completed: parse=0.1s"). The rollback left the agent's ring buffer
full, so each later post was the same size and failed the same way: no
host's metrics have landed since.
An ingest now keeps the newest MAX_SAMPLES_PER_INGEST (5) samples by ts,
logs how many it left out, and returns samples_dropped. The older samples
are the ones the ring buffer would have overwritten anyway. Why the
database writes so few rows a second is not yet known; the slow-ingest
line now measures it on a post that finishes.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>