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fix: move pubsub publishing out of database transactions to avoid conn exhaustion #17648

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Merged
dannykopping merged 7 commits into from
May 5, 2025
Merged

fix: move pubsub publishing out of database transactions to avoid conn exhaustion #17648

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ba2f90a
fix: move pubsub publishing out of database transactions to avoid con…
dannykopping May 1, 2025
74f5dd7
chore: commentary
dannykopping May 2, 2025
f6909ff
chore: polish
dannykopping May 2, 2025
1c84fac
chore: augment reconciler test to validate that broken publish does n…
dannykopping May 2, 2025
5117a5e
Merge branch 'main' of github.com:/coder/coder into dk/notify-outside-tx
dannykopping May 2, 2025
42cc3f5
chore: make lint
dannykopping May 2, 2025
9ddad0b
fix: only break pubsub after dbgen setup
dannykopping May 5, 2025
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chore: commentary 
Signed-off-by: Danny Kopping <[email protected]>
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@dannykopping
dannykopping committed May 2, 2025
commit 74f5dd78dcf48c2a8e0e42cd43440a4f2f25ab03
8 changes: 6 additions & 2 deletions enterprise/coderd/prebuilds/reconcile.go
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Expand Up @@ -103,8 +103,12 @@ func (c *StoreReconciler) Run(ctx context.Context) {
c.running.Store(true)

// Publish provisioning jobs outside of database transactions.
// PGPubsub tries to acquire a new connection on Publish. A connection is held while a database transaction is active,
// so we can exhaust available connections.
// A connection is held while a database transaction is active; PGPubsub also tries to acquire a new connection on
// Publish, so we can exhaust available connections.
//
// A single worker dequeues from the channel, which should be sufficient.
// If any messages are missed due to congestion or errors, provisionerdserver has a backup polling mechanism which
// will periodically pick up any queued jobs (see poll(time.Duration) in coderd/provisionerdserver/acquirer.go).
go func() {
for {
select {
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