# ⚡ Quick Action Plan - Based on Your Diagnostics

## 🎯 What Your Diagnostics Revealed

### ✅ Good:
- No errors, no locks, no blocking
- Most tables have excellent index usage (94-99%)
- Supplementary indexes installed correctly

### ⚠️ Issues:
- **ItemValues table**: 1.3 BILLION rows read via sequential scans! 😱
- **Peoples table**: 918 million rows read
- **Supplementary indexes**: Almost unused (0-10 uses)

---

## 🚀 What To Do Now

### Step 1: Use Jellyfin Normally (This Week) ⭐

The supplementary indexes we created target specific user interactions. **You need to actually use Jellyfin** to see if they help!

**Do these actions:**

#### Browse Recently Added
```
Dashboard → Recently Added
```
Tests: `idx_baseitems_datecreated_filtered`

#### Filter by Genre/Tags
```
Movies → Filter → Genre → Action
TV Shows → Filter → Tags → Drama
```
Tests: `idx_itemvaluesmap_itemvalueid_itemid`

#### Browse Libraries
```
Movies → Browse folders
TV Shows → Navigate seasons
```
Tests: `idx_baseitems_type_isvirtualitem_topparentid`

### Step 2: Run Diagnostics Again (End of Week)

```powershell
& "C:\Program Files\PostgreSQL\18\bin\psql.exe" -U jellyfin -d jellyfin -f sql\diagnostics.sql > diagnostics_week1.txt
```

Compare to today's results:
- Are supplementary indexes being used more?
- Has ItemValues improved?

### Step 3: Optimize ItemValues Table (Next Week)

After we see actual usage patterns, create targeted indexes for ItemValues.

---

## 📊 Why Supplementary Indexes Show 0 Uses

**Your diagnostics show:**
- 0 active database connections
- 0 long-running queries
- Index usage from past activity only

**This means:**
- Database has been idle
- Indexes only get used when queries run
- Need to use Jellyfin to generate workload

**It's like installing a highway but nobody's driven on it yet!** 🛣️

---

## 🔧 I Already Fixed One Thing

✅ **Updated Statistics** - Ran `ANALYZE` so PostgreSQL knows about the new indexes

---

## 📅 1-Week Testing Plan

| Day | Action | Expected Result |
|-----|--------|-----------------|
| **Day 1-2** | Use Jellyfin normally<br>- Browse libraries<br>- Filter by genre<br>- View Recently Added | Generate query workload |
| **Day 3** | Run diagnostics<br>`sql\diagnostics.sql` | See if indexes are used |
| **Day 4-7** | Continue using Jellyfin | Build more usage data |
| **Day 7** | Run diagnostics again<br>Compare to today | Decide which indexes to keep |

---

## 🎯 Success Metrics

After 1 week, you should see:

### If Indexes Are Working:
- `idx_baseitems_datecreated_filtered`: **100+ uses**
- `idx_itemvaluesmap_itemvalueid_itemid`: **50+ uses**
- ItemValues seq scans: **Reduced** from 226k

### If Indexes Aren't Helping:
- Still 0-10 uses after heavy use
- **Action**: Remove unused indexes to save space
- Create different indexes based on actual query patterns

---

## 🔥 The Real Problem: ItemValues Table

Your diagnostics show the biggest issue isn't what we optimized:

**ItemValues Table:**
- 226,121 sequential scans
- 1.3 BILLION rows read
- Only 52% index usage
- This is killing performance! 😱

**Why Our Indexes Didn't Help:**
We created indexes for:
- BaseItems (recently added, virtual items, folders)
- ItemValuesMap (genre/tag mapping)
- ActivityLogs (user activity)

But **NOT** for ItemValues itself!

**Next Step:**
After seeing usage patterns, we'll create indexes specifically for ItemValues table.

---

## 🎓 What This Teaches Us

### Index Creation Is Iterative:

1. **Phase 1**: Create indexes based on schema analysis ✅ (Done)
2. **Phase 2**: Test with real workload ← **You are here**
3. **Phase 3**: Monitor what's used, remove what's not
4. **Phase 4**: Create indexes for actual bottlenecks
5. **Phase 5**: Repeat

**You can't optimize until you have real data!**

---

## ⚠️ Don't Panic About Low Usage

**It's normal!** Here's why:

1. **Database was idle** - 0 connections when you ran diagnostics
2. **New indexes** - Just created, haven't had time to prove themselves
3. **Need workload** - Indexes only matter when queries run

**Analogy**: You installed a fire extinguisher. The fact it hasn't been used yet doesn't mean it's useless! 🧯

---

## 🚦 Quick Status Check

### ✅ Done:
- Supplementary indexes created
- Statistics updated
- Diagnostics analyzed

### 📋 To Do:
1. Use Jellyfin normally this week
2. Run diagnostics end of week
3. Compare results
4. Optimize ItemValues table
5. Remove unused indexes after 30 days

---

## 💡 Pro Tip: Keep a Log

Create a simple log of your Jellyfin usage:

```
Day 1:
- Browsed Movies library (5 min)
- Filtered by Action genre (10 items viewed)
- Viewed Recently Added (scrolled through 20 items)

Day 2:
- Searched for actor "Tom Hanks" (15 results)
- Watched a movie
- Browsed TV Shows (10 min)
```

This helps correlate index usage with your actions!

---

## 🎉 Bottom Line

**Your database is healthy!** The issues are optimization opportunities, not critical errors.

**Action Items:**
1. ✅ Statistics updated (done by me)
2. **Use Jellyfin normally for 1 week** (your task)
3. **Run diagnostics next week** (we'll do together)
4. **Optimize based on real data** (next phase)

**Keep calm and keep testing!** 🚀

See `DATABASE_ANALYSIS_REPORT.md` for the complete technical analysis.
