a month 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 • about 1 month ago
a month 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 • about 1 month ago
23 days 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.
9 days ago
This thread has been marked as solved automatically due to a lack of recent activity. Please re-open this thread or create a new one if you require further assistance. Thank you!
Status changed to Solved Railway • 9 days ago