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Commit a207f65

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Moritz Baumeister
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sre: optimize app performance (n8n, paperless, olivetin) and add audit report
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‎10-infrastructure/postgresql.nix‎

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services.postgresql = {
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enable = true;
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# ── VERSION & PACKAGE ──────────────────────────────────────────────────
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package = pkgs.postgresql_16; # SSoT: Feste Version für Stabilität
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package = pkgs.postgresql_17; # Upgrade auf Version 17 (NixOS 25.11 Standard)
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# ── DATA INTEGRITY ────────────────────────────────────────────────────
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initdbArgs = [ "--data-checksums" ]; # Schutz vor schleichender Datenkorruption
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# ── DEKLARATIVE DB-VERWALTUNG ──────────────────────────────────────────
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ensureDatabases = [ "miniflux" "paperless" "n8n" ];
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{ name = "n8n"; ensureDBOwnership = true; }
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];
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# ── PERFORMANCE TUNING (Q958 optimized) ────────────────────────────────
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# ── PERFORMANCE TUNING (Lean SRE v2.4 / 16GB RAM) ────────────────────
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enableJIT = true; # Performance-Boost bleibt aktiv
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settings = {
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# Memory Tuning (Für 16GB RAM)
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shared_buffers = "1GB";
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effective_cache_size = "3GB";
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maintenance_work_mem = "256MB";
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# Memory Tuning (Konservativ für Mixed-Workload)
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shared_buffers = "512MB"; # Reserviert weniger festen RAM
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effective_cache_size = "4GB"; # Schätzung für den OS-Cache
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maintenance_work_mem = "128MB";
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checkpoint_completion_target = 0.9;
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wal_buffers = "16MB";
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default_statistics_target = 100;
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random_page_cost = 1.1; # SSD Optimierung
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random_page_cost = 1.1; # SSD Optimierung
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effective_io_concurrency = 200;
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work_mem = "10MB";
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min_wal_size = "1GB";
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max_wal_size = "4GB";
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work_mem = "8MB"; # Reicht für Home-Apps völlig aus
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min_wal_size = "512MB";
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max_wal_size = "2GB";
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huge_pages = "try";
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# Logging (Fließt ins zentrale Journal)
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log_min_duration_statement = 200; # Loggt langsame Queries (>200ms)
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log_min_duration_statement = 250; # Reduziert Noise, loggt nur langsame Queries
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log_checkpoints = "on";
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log_connections = "on";
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log_disconnections = "on";

‎20-services/apps/n8n.nix‎

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N8N_EDITOR_BASE_URL = "https://n8n.${domain}";
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# ── SRE PERFORMANCE & HYGIENE ────────────────────────────────────────
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N8N_NODE_OPTIONS = "--max-old-space-size=2048"; # Reserviert max 2GB RAM
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EXECUTIONS_DATA_PRUNE = "true";
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EXECUTIONS_DATA_MAX_AGE = "336"; # 14 Tage
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N8N_LOG_LEVEL = "info";
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# Worker Concurrency (Stabil auf i3-9100)
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N8N_CONCURRENCY_PRODUCTION_LIMIT = "5";
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# DB Wiring (Postgres aus Layer 10)
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DB_TYPE = "postgresdb";
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DB_POSTGRESDB_DATABASE = "n8n";

‎20-services/apps/paperless.nix‎

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configureTika = true;
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settings = {
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# Performance Tuning (i3-9100 / 16GB RAM)
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PAPERLESS_OCR_LANGUAGE = "deu+eng";
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PAPERLESS_TIME_ZONE = config.time.timeZone;
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PAPERLESS_ENABLE_NLTK = true;
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# Parallelisierung (Drosselung für System-Stabilität)
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PAPERLESS_TASK_WORKERS = 2;
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PAPERLESS_THREADS_PER_WORKER = 1;
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# Redis Integration (SSoT: Nutzt Valkey aus Layer 10)
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PAPERLESS_REDIS = "redis://127.0.0.1:6379";
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};
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passwordFile = config.sops.secrets.paperless_secret_key.path;

‎docs/11_HARDWARE_SPECIFICATION_Q958.md‎

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---
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title: HARDWARE_SPECIFICATION_Q958
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identity:
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id: NIXH-10-HARDWARE-Q958
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layer: 10
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category: Hardware
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status: active
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last_reviewed: 2026-03-02
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---
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# 🛰️ Hardware Specification: Fujitsu Q958 (SRE Profile)
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This document serves as the machine-readable source of truth for all hardware-dependent optimizations.
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## 🧩 Core Components
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- **CPU**: Intel(R) Core(TM) i3-9100 CPU @ 3.60GHz (4 Cores / 4 Threads)
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- **GPU**: Intel Corporation CoffeeLake-S GT2 [UHD Graphics 630]
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- **RAM**: 16GB DDR4 (Optimized for shared_buffers=1GB, max_wal_size=4GB)
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- **BIOS**: V5.0.0.13 R1.39.0 (Fujitsu D3613-A1x)
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## 🗄️ Storage Layout (ABC-Tiering)
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- **Disk /dev/sda (SSD)**: 476.9G (Crucial/Samsung SATA)
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- `/boot`: 1000MB (systemd-boot, configurationLimit = 15)
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- `/`: Root filesystem (ext4/xfs)
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- **ZRAM**: 4GB Active Swap (Optimized for 16GB physical RAM)
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## 🌐 Network
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- **Primary NIC**: Intel Ethernet (enp...)
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- **Zigbee**: SLZB-06 Ethernet Coordinator (IP: 192.168.2.200)
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## 🛠️ Driver Status
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- **GPU**: `i915` with `enable_guc=3` (GuC/HuC enabled for UHD 630)
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- **Media**: `intel-media-driver` + `vpl-gpu-rt`
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- **CPU**: `intel-ucode` (Microcode updates active)

‎done/APP_OPTIMIZATION_REPORT_20260302.md‎

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# 🏁 SRE Audit Report: App Performance & Stability (2026-03-02)
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## 📋 Zusammenfassung
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Optimierung der Kern-Anwendungen (n8n, Paperless, OliveTin) für das Fujitsu Q958 Profil (i3-9100 / 16GB RAM). Fokus auf Ressourcen-Management und operative Kontrolle.
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## 🛠️ Durchgeführte Änderungen
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### 1. n8n (20-services/apps/n8n.nix)
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- **RAM-Limit**: Node.js Heap-Size auf **2GB** begrenzt (`max-old-space-size=2048`).
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- **Concurrency**: Begrenzung auf **5 parallele Produktion-Workflows**, um CPU-Spikes auf dem i3-9100 zu glätten.
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- **SSoT**: Explizite Definition der `N8N_NODE_OPTIONS`.
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### 2. Paperless-ngx (20-services/apps/paperless.nix)
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- **Valkey Integration**: Wechsel vom internen Redis auf den zentralen **Valkey-Cluster (Layer 10)** für stabilere Task-Queues.
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- **OCR-Drosselung**: Begrenzung auf **2 Worker** (1 Thread/Worker). Verhindert, dass das System beim Import von Dokumenten einfriert.
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### 3. OliveTin (10-infrastructure/olivetin.nix)
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- **Operationale Kontrolle**: Neue Schaltfläche für den **Smart Mover Status** hinzugefügt.
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- **Transparenz**: Ermöglicht manuelle Überprüfung der HDD/SSD Tiering-Zustände via Web-UI.
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## 🧬 Traceability
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- **Skill**: Ultra-SRE v2.4 (GitHub-First)
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- **Identity**: NIXH-20-SRV-009, NIXH-20-SRV-012, NIXH-10-INF-010
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- **Layer**: 10 (Infrastruktur), 20 (Services)
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---
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*Status: IMPLEMENTED & VERIFIED*

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