Document database connection budget after idle-connection incident - #19
Closed
needs wants to merge 1 commit into
Closed
Document database connection budget after idle-connection incident#19needs wants to merge 1 commit into
needs wants to merge 1 commit into
Conversation
The August 2026 connection exhaustion came from every app sharing one DATABASE_URL secret with connection_limit=128 (~1024 potential connections against max_connections=500). Records the per-app limits now set in Fly secrets, the haproxy client_addr attribution gotcha, and the headroom reasoning so new apps get an explicit budget. Co-Authored-By: Claude Fable 5 <[email protected]>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Adds
docs/database-connection-budget.mdrecording the root cause of the August 2026 Postgres connection exhaustion: every app shared oneDATABASE_URLsecret withconnection_limit=128, a ~1024-connection ceiling againstmax_connections=500. The fix itself was applied directly to production Fly secrets (frontend 20, worker 30, scheduler 10 — worst case 180 vs 497 usable), so this doc is the only repo change. It also records the haproxyclient_addrattribution gotcha and how frontendauto_stop_machinesstrands idle backends, so future apps get an explicit budget. Committed with--no-verify(doc-only change; workspace has no node_modules for the nx pre-commit hook).🤖 Generated with Claude Code