On 2026-10-17 the NFS under Postgres stalled for ~15 minutes. Two things went wrong for the readings that would have explained it: - The SNMP poll stored before it polled again, so while the database hung it stopped polling. It now collects on schedule and hands each round to a Holding (steward/core/holding.py): one writer stores what is held, oldest first, each reading at the time it was collected. Bounded at two hours of polls, with a 30-minute deadline on a store; the device list read falls back to the last one read after 10 s. - "Mount not answering" (10 checks in a row) went pending on Docker02 and Docker03 and never fired: the agent sent each post's backlog with its newest, healthy sample, and that sample ended every post's run. Agent 1.22.0 queues the new sample behind the backlog, so Steward receives a host's samples in the order they were taken. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>