dceaf82934
Full-codebase-audit 2026-05-30 outputs: - Audit report: 09 - Audits/Full Codebase Audit - 2026-05-30.md - 81 issue files ISSUE-055..135 (decisions + 1 skipped no-brainer). - Scanner docs from scratch (was zero): architecture, data model, API ref, payment flow, operations runbook + repo README. - Doc-sync updates across API reference, data models, flows, design system. - Secret Rotation Runbook (08 - Operations) for the exposed credentials. - Reusable workflow guide (07 - Development) + .claude/workflows/full-codebase-audit.js. Issues remain status:open intentionally — the code fixes are uncommitted-then-committed working-tree changes per repo and aren't "resolved" until merged/deployed. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
39 lines
1.2 KiB
Markdown
39 lines
1.2 KiB
Markdown
---
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issue: 123
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title: "Backend: notification unread-count chatty DB access — 3 parallel countDocuments per event"
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severity: low
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domain: Notification
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labels: [performance, backend, database]
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status: open
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created: 2026-05-30
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source: Full Codebase Audit 2026-05-30
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---
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# Backend: notification unread-count chatty DB access — 3 parallel countDocuments per event
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**Severity:** low
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**Domain:** Notification
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**Labels:** performance, backend, database
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## Description
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`NotificationService.ts:145` runs 3 `countDocuments` calls per unread-count request. When notification events are frequent, this creates a high volume of DB count queries. Under heavy load, these compete with write operations.
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## Options
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1. Cache per-user unread count in Redis, increment/decrement on events.
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2. Coalesce the 3 parallel `countDocuments` into fewer aggregations.
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3. Leave as-is (covered by existing index) and only optimize if hot.
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## Recommendation
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Introduce a Redis-backed unread counter updated incrementally; until then, coalesce counts.
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## Affected Files
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- `backend/src/services/notification/NotificationService.ts:145`
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## References
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- [Full Codebase Audit 2026-05-30](../09%20-%20Audits/Full%20Codebase%20Audit%20-%202026-05-30.md) — DEC-44
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