perf: prune unbounded local storage growth - #716
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Sembast has no indexes: every write to the orders store re-evaluated one query listener per OrderNotifier and per visible trade row, each re-filtering and re-sorting the whole store and re-decoding the results on the UI isolate - O((notifiers + rows) x messages) per incoming message, growing with trade history. MostroStorage now keeps one in-memory index by order id (newest first), warmed from disk once per cold start. addMessage and the delete paths update it and notify a single per-order change stream; every public watcher and query keeps its signature but is served from memory and demultiplexed per order, so a write for order A never wakes order B's watchers. The transient request-id lookup stays on Sembast. Cross-isolate visibility is unchanged: sembast_io never surfaced another isolate's writes to an open database either way.
Both Sembast files are fully loaded into RAM and JSON-parsed at every
launch, and three record families grew forever: DM reservation records
({id, created_at}, no order_id - unreachable by the session cleanup's
deleteWhere), chat/message records for orders whose session is gone, and
the notification history. With the "keep forever" session policy nothing
pruned at all. An active user accumulated tens of MB parsed on every
cold start.
StoragePruner (invoked from the 30-minute cleanup, before and regardless
of the session-retention early return):
- deletes reservations older than the widest subscription lookback (7d);
- deletes chat/dispute event records and mostro messages whose order or
dispute has no live session, after a 30-day grace window so an
in-progress restore is never raced (messages go through the storage
index so it stays coherent);
- caps the notification history at the newest 300 entries.
Stacked on the storage-index PR (allOrderIds).
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| final removed = await eventStorage.deleteWhere(Filter.and([ | ||
| Filter.isNull('type'), | ||
| Filter.lessThan('created_at', cutoff), | ||
| ])); |
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For sessions kept longer than seven days, this deletes the only durable marker used to suppress already-processed Mostro order events, even though buildOrdersFilter in lib/features/subscriptions/subscription_manager.dart:670-686 sets no since bound. On a later background-service restart or relay reconnection, the listener in lib/background/background.dart:321-332 therefore accepts the historical event again and can show old trade notifications as new; forever-retained sessions can repeat this indefinitely. Either retain these markers while their session is live or bound the order subscription before expiring them.
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| final cutoff = sorted[notificationCap - 1].timestamp; | ||
| final removed = await notificationsStorage.deleteWhere( | ||
| Filter.custom((record) { | ||
| final value = record.value; | ||
| if (value is! Map) return false; | ||
| final raw = value['timestamp']; | ||
| if (raw is! String) return false; | ||
| final ts = DateTime.tryParse(raw); | ||
| return ts != null && ts.isBefore(cutoff); |
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When multiple notifications share the 300th entry's timestamp, the strict isBefore(cutoff) predicate retains every tied record, so the history remains above notificationCap; if a burst produces 320 identical timestamps, this removes nothing on every pruning pass. Delete the specific sorted entries beyond index 299, using their IDs or a deterministic timestamp-and-ID tie-breaker, so the cap is actually enforced.
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Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review. WalkthroughAdds bounded local-storage pruning for reservations, orphaned events and messages, and notification history. Integrates pruning into ChangesStorage pruning
Estimated code review effort: 3 (Moderate) | ~25 minutes Poem
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Reviewed with the branch checked out: flutter analyze clean, test/services +
test/data green (251 tests).
Most of my time went into the scary part — Filter.isNull('type'), which
deletes by absence of a field — and that part is sound. I traced every
historical writer to the events store (b91addf8 2025-04 → cfefb993
2026-08): chat records have carried type since 713c6d59 (Jul 2025) and
dispute records since 973b0174 (Oct 2025), and both history loaders filter on
type + order_id/dispute_id (chat_room_notifier.dart:424,
dispute_chat_notifier.dart:390), so a typeless record is never reachable as
chat history — it only ever serves hasItem dedup. No legacy history is at
risk. Session.disputeId is real and persisted, so liveDisputeIds is sound,
and running the prune before the session-expiry loop is the right order:
liveOrderIds is the pre-deletion set.
Two blocking findings, though.
1. Unit mismatch: the 30-day grace window doesn't exist for daemon-timestamped orders
MostroMessage.timestamp holds whatever the daemon sent — fromJson passes
json['timestamp'] straight through — and addMessage only fills in
milliseconds when the field is absent:
message.timestamp ??= DateTime.now().millisecondsSinceEpoch;
Both units genuinely coexist in the store. From a real device log:
Timestamp: 1787203150929 ← 13 digits, milliseconds (filled in by the app)
Timestamp: 1776886894 ← 10 digits, seconds (sent by the daemon)
_pruneOrphanMessages compares against cutoffMs. For any order whose latest
message carries a seconds timestamp (~1.78e9), ts < cutoffMs (~1.75e12) is
unconditionally true, so every message for that order is deleted the moment
its session is gone — with no grace window at all.
Repro (message written today, seconds timestamp, liveOrderIds: {}):
Expected: an object with length of <1>
Actual: []
the message was written today; the 30-day grace window must still protect it
The new tests can't catch this because they assign timestamp by hand in
milliseconds. Worth normalizing before the comparison
(ts < 1e12 ? ts * 1000 : ts) and, ideally, requiring positive proof of age
rather than treating an unknown-unit value as old. Side evidence that the units
are already tangled elsewhere: logs show
Updated dispute ... createdAt from message timestamp: 58604-03-19 — year
58604.
2. The 7-day reservation TTL is justified by a since window that doesn't exist
The stated rationale is that reservations "only guard replay dedup within the
subscription's since window". But the subscription that writes those
reservations is the orders one, and buildOrdersFilter
(subscription_manager.dart:670) carries no since and no limit on either
transport:
case Transport.nip44:
return NostrFilter(kinds: [14], authors: [mostroPubkey], p: tradeKeys);
And the reservation is the only dedup for Mostro DMs —
if (await eventStore.hasItem(event.id!)) return; (mostro_service.dart:141) —
with the background isolate using the same store to suppress duplicate pushes
(background.dart:160). Since Config.sessionExpirationHours = 720 (30 days),
live sessions routinely outlive 7 days, and in "keep forever" mode they live
indefinitely.
So pruning reservations at 7 days reopens replay of every DM a relay still holds
for a live trade key: duplicate push notifications for old events, and
addMessage rewrites that re-fire the index watchers (_indexAdd →
_notifyOrder) and recompute OrderState from stale actions — the exact
failure _markEventProcessed's own comment warns about.
It is narrower than it sounds, to be fair: the filter only asks for the trade
keys of live sessions, so finished trades are never re-delivered. But the
justification as written doesn't hold. Options: tie reservationRetention to
max(session lifetime, lookback) instead of a flat 7 days; or give the orders
filter a since and then 7 days becomes honest; or apply the same orphan rule
to reservations (keep the ones belonging to live trade keys).
Nits
- ref.read(notificationsRepositoryProvider) as NotificationsStorage — the
provider is typed Provider<NotificationsRepository>. It works today, but a
test override or an implementation swap throws, and the surrounding
try/catch turns that into a logger.w that silently skips all pruning
forever. StoragePruner only needs getAll + deleteWhere, so taking the
interface would be safer.
- Errors are swallowed twice: prune() catches everything internally and
_cleanup wraps it again. A broken pruner is invisible outside the logs.
- _capNotifications uses a strict isBefore(cutoff), so ties on the boundary
survive and the cap can exceed 300. The test uses distinct minutes, so it
never sees it.
- The same method derives the cutoff from getAll() (which filters
deleted != true) but deletes across all records including soft-deleted ones.
Harmless, but inconsistent.
- This is a perf PR that adds, on the main isolate every 30 minutes, a full
Filter.custom scan of the events store plus a getAll() of notifications
plus a per-order loop with awaits — over exactly the databases described as
tens of MB. Worth measuring, or moving off the main isolate the way #703/#705
did.
- Framing: in forever mode the orphan pruning of chat/message records still
never fires (sessions never die, so nothing is an orphan). The forever-mode
win is reservations plus the notification cap. The description reads as if all
three rules start working.
Process
Stacked on #715, so retarget to main once that lands; #710 is still needed to
get CI green.…warm-up Addresses PR review feedback: - deleteAll() is now overridden in MostroStorage so the account restore (restore_manager.dart) and master-key rotation (key_management_screen.dart) flows, which call the inherited BaseStorage.deleteAll(), also clear the in-memory index and notify watchers. Previously disk was emptied while the index kept serving deleted messages, merging pre-restore and post-restore histories under the same order ids. deleteAllMessages() now delegates. - A failed index warm-up no longer poisons every later query: the retained future is dropped so the next call retries. - addMessage claims the key synchronously, so two concurrent writes for the same key cannot both pass the existence check and index the message twice. - dispose() closes the order-change controller.
Addresses PR review feedback: - Reservation retention is no longer a flat 7 days. The orders filter carries no `since` and the reservation is the only dedup for Mostro DMs, so the cutoff is now the older of the 7-day floor and the oldest live session's start: an event for a live session cannot predate that session, so nothing a relay could still replay is dropped. Works in "keep forever" mode too. - Message timestamps are normalized before the age comparison. The daemon sends seconds and the app fills in milliseconds only when the field is absent; comparing a seconds value against a millisecond cutoff deleted every such order the moment its session was gone, with no grace window. - The notification cap deletes the exact overflow entries by id (timestamp then id as tie-breaker) instead of everything before the cap-th timestamp, so a burst of tied timestamps can no longer keep the history above the cap. Added NotificationsRepository.deleteByIds for a single-transaction delete. - StoragePruner takes the NotificationsRepository interface, dropping the `as NotificationsStorage` cast that would have thrown under a test override or implementation swap. - Errors are no longer swallowed twice: prune() lets them propagate and SessionNotifier logs them as errors with a stack trace. - The pruner rate-limits itself to one full scan every 6 hours instead of scanning both stores on the main isolate at every 30-minute session tick, and is kept across ticks rather than rebuilt.
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Feedback addressed in 5767aa9. Codex P1 / Catrya #2 — reservation TTL vs. a Catrya #1 — seconds vs. milliseconds. Confirmed and fixed: timestamps are normalized ( Codex P2 / nit — notification cap ties. Now deletes the exact overflow entries by id (timestamp desc, id desc as a deterministic tie-breaker) instead of everything before the cap-th timestamp. Added Nit — the Nit — errors swallowed twice. Nit — a full scan on the main isolate every 30 minutes. The pruner now rate-limits itself to one pass every 6 hours ( Framing. PR description rewritten with a "what actually fires in forever mode" section: the forever-mode win is reservations plus the notification cap; the orphan rules bound growth under the default 30-day expiry.
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Blocking
1. Stack state. This targets perf/single-store-watcher (#715), still open, and it is behind its own base: it merged 6f564bf2 while the base tip is 1931064a. Needs #715 merged, a re-merge here, then a retarget to main.
2. No CI has run on this head. There are 0 workflow runs on perf/storage-pruning (perf/single-store-watcher ran green). For a PR that deletes user records, a local green suite isn't enough.
3. The pruner picks "the latest message" from a mixed-unit ordering.
_pruneOrphanMessages normalizes seconds/ms when comparing (_timestampMs), but selects the record via getLatestMessageById, which sorts on the raw field:
list.sort((a, b) => (b.timestamp ?? 0).comp mostro_storage.dart:46 ``` A millisecond value (~1.7e12) always outranegardless of real time. The PR comment already acknowledges both units coexist — treach the selection.
Reproduced against this head: a 40-day-old econds** record written today, and `deleteAllMessagesByOrderId` then takes bot ``` latest picked: action=new-order ts=17848341 Expected: non-empty / Actual: []On where each unit comes from: mostro-core's MessageKind has no timestamp field, so every inbound daemon message falls through to addMessage's message.tillisecondsSinceEpoch (ms), while
restore_manager.dart:830,872 writes orde.now().millisecondsSinceEpoch (seconds,
with an ms fallback on the same line).
To be fair on severity: I could not construct a production sequence that triggers this today, since the only seconds
writer is restore using the order's creatiothe newest ms record. So it's latent, notan active bug. But it's a destructive operation resting on an unstated invariant, and closing it is cheap using data the loop already has:
for (final orderId in await messageStorage.
if (liveOrderIds.contains(orderId)) continue;
// Both units coexist in `timestamp`, so ot
// be trusted to surface the newest record.
int? newest;
for (final m in await messageStorage.getAllMessagesForOrderId(orderId)) {
final ts = _timestampMs(m.timestamp);
if (ts != null && (newest == null || ts
}
if (newest != null && newest < cutoffMs) {
await messageStorage.deleteAllMessagesByOrderId(orderId);
logger.i('Pruned orphaned messages for
}
}This keeps the current conservative behaviour (nothing prunable ⇒ nothing deleted). Worth a test case for it too:
all 8 existing tests use a single unit per the code comment describes.
Non-blocking, but should be settled
**The forever-mode claim in the descriptionw - 7d, oldestLiveSessionStart)`, and inforever mode sessions never expire — with aoff is two years and effectively nothing ispruned. So reservation pruning isn't the forever-mode win. Either fix the description or decide whether you want a
cutoff that actually bounds growth there. Tit only ever keeps more).
Minor
_oldestLiveSessionStartomits_requesttedoes include. Harmless today (thosesessions are recent and would never lower the cutoff), but it's an inconsistency._lastRunAtis in-memory only, so "one scess, not persisted.- The scan itself (
Filter.customover thethe main isolate; the 6-hour limit is whatkeeps that acceptable.
With the item 3 fix, CI green and the stackgo.
… disk `_watchOrder` awaited `_ensureIndex()` inside an async `onListen`, whose future the controller never observes: a failed warm-up left the subscriber waiting for data that never came and escaped as an unhandled async error. The failure is now forwarded through the stream and the controller is closed. `onCancel` no longer re-closes an already closed controller, since its done future only completes after `onCancel` returns and awaiting it again deadlocked. `deleteAllMessagesByOrderId` aborted before `deleteWhere` when the warm-up failed, leaving the records on disk. The warm-up is still awaited first so an in-flight read cannot re-index rows about to be deleted, but its failure no longer stops the deletion. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01BDpY7XJcGHDtN21KUJA8e4
The index sorts on the raw timestamp field, where both seconds and milliseconds coexist, so any millisecond value outranked any seconds value regardless of real time and a fresh seconds record could not protect an order from pruning. The pruner now scans the order's messages and keeps the newest normalized timestamp. Request-id sessions now also bound the reservation cutoff, like the other live sessions.
…perf/storage-pruning
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Feedback addressed in 7be9e62 (fix) and a489723 (stack merge). Blocking1. Stack state. 2. CI. 3. Mixed-unit "latest message". Confirmed. Non-blockingForever-mode claim. You are right: with the cutoff at Minor
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Inline comments:
In `@lib/services/storage_pruner.dart`:
- Around line 138-141: Reformat the comparator callback in
lib/services/storage_pruner.dart lines 138-141 to remove the excess indentation
while preserving its sorting behavior. Apply the corresponding formatting
correction at lib/shared/notifiers/session_notifier.dart lines 355-356; do not
change the logger.i call’s valid multiline formatting.
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Summary
Item 5.3 of the performance plan. Both Sembast files are fully loaded into RAM and JSON-parsed at every launch, and three record families grew without bound:
{id, created_at}, noorder_id) — written per incoming node event and unreachable by the session cleanup'sdeleteWhere(order_id); never deleted, ever.sessionExpirationHours == 0("keep forever") nothing pruned at all.An active user accumulated tens of MB re-parsed on every cold start and taxing every store scan.
Changes
StoragePrunerwith three conservative rules (bounded, injectable clock):sinceand the reservation is the only dedup for Mostro DMs, so every reservation a live session's trade key could still see replayed is kept; an event for a live session cannot predate that session, so anything older is safely dead weight.SessionNotifier's existing 30-minute cleanup, before and regardless of the forever-mode early return, and rate-limited to one full scan every 6 hours so a scan of both stores is not paid at every tick on the main isolate.What actually fires in forever mode
With
sessionExpirationHours == 0sessions never expire, so nothing becomes an orphan and the chat/message rules stay idle by design. The reservation cutoff ismin(now - 7d, oldest live session start), and in forever mode that oldest session can be years old, so reservation pruning is bounded by correctness rather than by growth there: with a two-year-old live session it removes nothing. That is deliberate (the cutoff only ever keeps more), so the only rule that bounds growth in forever mode is the notification cap. The orphan rules and the 7-day reservation floor are what bound growth under the default 30-day session expiry.Test plan
storage_pruner_test.dart(compile-RED first): reservation TTL, reservations kept for live sessions, orphan-vs-live chat events, grace window, seconds-vs-milliseconds timestamps, mixed units within one order, index-coherent message pruning, notification cap ordering, tied timestamps, minimum-interval rate limitflutter analyze— no new issues🤖 Generated with Claude Code
https://claude.ai/code/session_018fTxqxhpdL5siTgKZqwtur
Summary by CodeRabbit
New Features
Bug Fixes
Tests