15 days ago
Since this morning, Postgres WAL sync latency has intermittently been elevated (from <10ms to 100ms-10sec or more) for small, single-row inserts (reported query latency via `log_min_duration_statement` remains <<10ms). CPU and memory metrics on the Postgres container are normal, so it seems to be related to the volume-mounted filesystem.
2 Replies
Status changed to Awaiting Railway Response Railway • 15 days ago
14 days ago
We're aware of this and actively investigating. We'll update you as soon as we have more to share.
In the meantime, if you're experiencing impact, redeploying your service to a different region can help as an immediate workaround. Apologies for the trouble!
Status changed to Awaiting User Response Railway • 14 days ago
20 hours ago
Hey, sorry for the delay here. We've identified the root cause — your Postgres instance is on a storage host with degraded I/O performance, which is what's been causing the elevated WAL sync latency you reported.
We've staged a migration to a healthier host. To apply it, trigger a redeploy on the Postgres service at your convenience — the volume will migrate with it. There will be brief downtime during the migration (typically a few minutes).
Once you're on the new host, your WAL sync latency should return to the normal <10ms range.