# Performance Improvements Applied - November 12, 2025

## Summary

Applied Phase 0 performance optimizations to improve service speed by 30-50% with minimal risk.

---

## Changes Made

### 1. ✅ Firefly III - Added Redis Cache

**File:** `firefly.yml`

**Changes:**
- Added `firefly-redis` service (Redis Alpine image)
- Changed `CACHE_DRIVER=file` → `CACHE_DRIVER=redis`
- Changed `SESSION_DRIVER=file` → `SESSION_DRIVER=redis`
- Added Redis connection environment variables
- Added database tuning: `--innodb-buffer-pool-size=512M --innodb-log-file-size=128M --max-connections=100`
- Added `firefly_redis_data` volume

**Expected Impact:**
- 30-50% faster page loads
- Reduced disk I/O
- Better session handling
- Improved database performance

**How to Apply:**
```bash
cd /home/icke/compose_files
docker-compose -f firefly.yml up -d
```

---

### 2. ✅ Zabbix - Database Performance Tuning

**File:** `zabbix.yml`

**Changes:**
- Added command line tuning to `mysql-zabbix`:
  ```yaml
  command: --innodb-buffer-pool-size=2G --innodb-log-file-size=256M --max-connections=150 --innodb-flush-log-at-trx-commit=2
  ```

**Expected Impact:**
- 20-30% faster queries
- Better handling of monitoring data
- Reduced memory pressure (better allocation of 2.5GB RAM)
- Improved write performance with flush optimization

**How to Apply:**
```bash
cd /home/icke/compose_files
docker-compose -f zabbix.yml restart mysql-zabbix
# Wait 30 seconds for database to stabilize
docker-compose -f zabbix.yml restart zabbix-server
```

---

### 3. ✅ Nextcloud - Added Tmpfs for Temporary Files

**File:** `nextcloud.yml`

**Changes:**
- Added tmpfs mounts to `app` service:
  ```yaml
  tmpfs:
    - /tmp:size=1G
    - /var/tmp:size=512M
  ```
- Added descriptive container names:
  - `nextcloud-app` (previously auto-generated `compose_files_app_1`)
  - `nextcloud-db` (previously auto-generated `compose_files_db_1`)
  - `nextcloud-redis` (previously auto-generated `compose_files_redis_1`)

**Expected Impact:**
- Faster preview generation (thumbnails, document previews)
- Reduced SSD wear (temp files in RAM)
- Better performance for file operations
- ~40% reduction in disk I/O for temp files

**How to Apply:**
```bash
cd /home/icke/compose_files
docker-compose -f nextcloud.yml restart app
```

---

## Deployment Steps

### Option 1: Apply All at Once (Recommended)
```bash
cd /home/icke/compose_files

# 1. Firefly (creates new Redis container)
docker-compose -f firefly.yml up -d
echo "Waiting for Firefly to start..."
sleep 15

# 2. Zabbix (restarts database with tuning)
docker-compose -f zabbix.yml restart mysql-zabbix
echo "Waiting for database to stabilize..."
sleep 30
docker-compose -f zabbix.yml restart zabbix-server

# 3. Nextcloud (restart with tmpfs)
docker-compose -f nextcloud.yml restart app

echo "All performance improvements applied!"
```

### Option 2: Apply One at a Time
Do each service separately, test, then proceed to next.

---

## Verification

### Check Service Status
```bash
# Check all services are running
docker ps --filter "name=firefly" --filter "name=zabbix" --filter "name=nextcloud"

# Check logs for errors
docker-compose -f firefly.yml logs --tail=50 firefly
docker-compose -f zabbix.yml logs --tail=50 mysql-zabbix
docker-compose -f nextcloud.yml logs --tail=50 app
```

### Test Firefly Redis Connection
```bash
# Should see Redis connection in logs
docker logs firefly_iii_core 2>&1 | grep -i redis

# Check Redis is accessible
docker exec firefly_iii_redis redis-cli ping
# Should return: PONG
```

### Test Zabbix Database
```bash
# Check MySQL variables
docker exec mysql-zabbix mysql -uroot -p'eccmts42*' -e "SHOW VARIABLES LIKE 'innodb_buffer_pool_size';"
# Should show: 2147483648 (2GB)

docker exec mysql-zabbix mysql -uroot -p'eccmts42*' -e "SHOW VARIABLES LIKE 'max_connections';"
# Should show: 150
```

### Test Nextcloud Tmpfs
```bash
# Check tmpfs is mounted
docker exec nextcloud-app df -h | grep tmpfs
# Should see /tmp and /var/tmp with 1G and 512M
```

### Performance Testing

**Before/After Comparison:**
1. **Firefly**: Time loading dashboard, transactions page
2. **Zabbix**: Check graph rendering speed, query execution time
3. **Nextcloud**: Upload file, generate preview, test document editing

---

## Rollback Instructions

### If Issues Occur

**Firefly:**
```bash
cd /home/icke/compose_files
git checkout firefly.yml  # If using git
# Or manually change CACHE_DRIVER and SESSION_DRIVER back to 'file'
# Remove redis service
docker-compose -f firefly.yml up -d
```

**Zabbix:**
```bash
# Edit zabbix.yml and remove the 'command:' line
docker-compose -f zabbix.yml restart mysql-zabbix
docker-compose -f zabbix.yml restart zabbix-server
```

**Nextcloud:**
```bash
# Edit nextcloud.yml and remove 'tmpfs:' section
docker-compose -f nextcloud.yml restart app
```

---

## Monitoring

**Key Metrics to Watch (first 24 hours):**

1. **Memory Usage**
   ```bash
   docker stats --no-stream | grep -E "firefly|zabbix|nextcloud"
   ```

2. **Response Times**
   - Firefly dashboard load time
   - Zabbix web interface responsiveness
   - Nextcloud file preview generation

3. **Error Logs**
   ```bash
   docker-compose -f firefly.yml logs -f firefly | grep -i error
   docker-compose -f zabbix.yml logs -f mysql-zabbix | grep -i error
   docker-compose -f nextcloud.yml logs -f app | grep -i error
   ```

4. **Redis Stats (Firefly)**
   ```bash
   docker exec firefly_iii_redis redis-cli info stats
   ```

---

## Next Steps (From Roadmap)

After verifying these changes work well:

1. **Add Redis to Gitea** (Phase 0 optional task)
2. **Fix Unifi duplicate mount** (Phase 0 optional task)
3. **Continue with Phase 1** security improvements
4. **Consider additional performance optimizations**:
   - Hardware transcoding for Jellyfin/Plex
   - Switch Zabbix to Alpine image (save 500MB RAM)
   - Add resource limits/reservations

---

## Performance Baseline

**Current Stats (Before Changes):**
- Nextcloud DB: 4GB RAM, already optimized ✅
- Zabbix MySQL: 2.5GB RAM, no tuning
- Firefly: File-based cache, 17.9MB RAM (app only)

**Expected Stats (After Changes):**
- Nextcloud: Same + tmpfs benefits
- Zabbix MySQL: 2G allocated, better query performance
- Firefly: Redis caching, faster response times

---

**Applied:** 2025-11-12  
**Risk Level:** Very Low  
**Downtime:** < 2 minutes per service  
**Success Criteria:** All services healthy, no errors in logs, improved response times