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Restore Hyperdrive pool size in checkout-edge

Imagecoreplane/checkout-edge#142PolylaneCritical severityOpened 3 hours agoCI passing
ImageDismissMerge
Files changedInvestigation
src/hyperdrive/pool.ts
@@ -14,21 +14,29 @@ export class HyperdrivePool {
1414 #inFlight = 0;
1515
16- constructor(private readonly binding: Hyperdrive) {
17- this.#ceiling = DEFAULT_CEILING;
16+ constructor(
17+ private readonly binding: Hyperdrive,
18+ private readonly ceiling = poolCeiling(binding),
19+ ) {
20+ if (this.ceiling < MIN_CEILING) {
21+ throw new PoolMisconfigured(this.ceiling, MIN_CEILING);
22+ }
1823 }
1924
2025 async acquire(signal: AbortSignal): Promise<Connection> {
21- while (this.#inFlight >= this.#ceiling) {
22- await this.#queue.wait();
26+ if (this.#inFlight >= this.ceiling) {
27+ queueDepth.record(this.#queue.size, { binding: this.binding.id });
28+ if (this.#queue.size > this.ceiling * QUEUE_ALARM_RATIO) {
29+ logger.warn("hyperdrive pool saturated", {
30+ ceiling: this.ceiling,
31+ waiting: this.#queue.size,
32+ });
33+ }
34+ await this.#queue.wait(signal);
2335 }
2436 this.#inFlight += 1;
2537 return this.binding.connect();
2638 }
@@ -41,9 +53,13 @@ export class HyperdrivePool {
4153 release(connection: Connection): void {
4254 this.#inFlight -= 1;
43- this.#queue.next();
55+ queueDepth.record(this.#queue.size, { binding: this.binding.id });
56+ this.#queue.next();
4457 }
4558
46- get saturated(): boolean {
47- return this.#inFlight >= this.#ceiling;
59+ get saturated(): boolean {
60+ return this.#inFlight >= this.ceiling;
4861 }
4962}
@@ -58,14 +71,18 @@ function poolCeiling(binding: Hyperdrive) {
58- const configured = binding.maxConnections;
59- if (!configured) return DEFAULT_CEILING;
60- return configured;
71+ const configured = binding.maxConnections ?? DEFAULT_CEILING;
72+ // The binding's ceiling is the contract: a worker that opens more
73+ // connections than the pool allows queues here instead of at the origin,
74+ // which is invisible in origin latency. Fail loudly at boot instead.
75+ return Math.max(configured, MIN_CEILING);
6176}
6277
63-export const DEFAULT_CEILING = 5;
64-export const QUEUE_ALARM_RATIO = 4;
78+export const DEFAULT_CEILING = 50;
79+export const MIN_CEILING = 25;
80+export const QUEUE_ALARM_RATIO = 0.5;
6581
66-const queueDepth = noopCounter();
67-const logger = console;
82+const queueDepth = meter.createHistogram("hyperdrive.queue_depth");
6883
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Imagecheckout-edgeWorker
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Imagehd-prodHyperdrive
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Imagepayments-dbDatabase
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github.com/coreplane/orders-api/pull/482

ImageAdd trigram index for order search #482

Openrvidal wants to merge 1 commit into main from order-search-trgm
Conversation1Commits1Checks2Files changed1
polylanebotcommented 2 minutes ago···
Caution

Merging this pull request may degrade production (high impact).

Merging this blocks every write to orders while the index builds. migrations/0114_order_search_trgm.sql:3 adds CREATE INDEX … USING gin (search_text gin_trgm_ops) without CONCURRENTLY, and a plain CREATE INDEX takes a full write lock on orders for the whole build. Checkout sustains ~38 writes/s on that table; each one queues behind the lock until the build finishes.

To make this safe: build the index with CREATE INDEX CONCURRENTLY outside the transactional migration.

orders-db · writes per second · last 48h
02040
-48h-24hnow
every one of these writes blocks while the index builds

Polylane analysed de91b47 for production impact.

Some checks were not successful1 failing and 1 successful check
ci / testSuccessful in 2m 4sDetails
Polylane production impactNon-concurrent index build locks writes on ordersDetails
Merging is blocked

Det er altid tilgængeligt til at besvare dit spørgsmål. Det kender din app og graver utrætteligt gennem data for dig.

Image# engineering
MessagesAdd canvasFiles & links
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boris2:09 AM

checkout feels slow. is that us or payments-api?

Image
PolylaneAgent2:09 AM

Us. checkout-edge Wall Time P99 is 18× its own baseline and the requests are queuing for a Hyperdrive connection, not on a downstream call.payments-api is answering in 180ms, flat for a week. Deploy 9f3c2a1 at 2:02 AM shrank the hd-prod pool from 50 connections to 5.

👀 2
Image
aleksandr2:11 AM

how long has it been queueing like that?

Image
PolylaneAgent2:11 AM

Nine minutes, since the deploy landed. It never went above 2 before that. I submitted a PR fix and tagged@justin to deploy 2 minutes ago.

hd-prod · pool queue depth · last 30mdeploy 9f3c2a1
02040
-30m-15mnow
every request in that queue is a checkout waiting

Open in PolylaneConfigure

Og det deler indsigter med andre agenter. Et nyt produktionskontekstlag for dine kodeagenter, over MCP eller CLI'en.

Imageclaude — ~/checkout-edge

> make region a required field on the checkout request schema

●polylane · searchcallers of POST /checkout

●polylane · runToolqueryLogs · request shapes

⏺Hold on: cart-svc and edge-gateway still send region-less requests,41,200 in the last 24h. Requiring it now would 400 them both.

Safer: default it, migrate the two callers, then require.

Are you okay with this plan?

❯ 1. Yes, default it and migrate both callers

❯ 2. Yes, but require it now and let them 400

❯ 3. No, tell Claude what to do differently (esc)

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