262 lines
6.7 KiB
Markdown
262 lines
6.7 KiB
Markdown
# Proxmox Host Analysis Example
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## What You'll See When Running on Proxmox
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When you run `sudo ./one-button-optimizer.sh` on a Proxmox host, you'll now see a **comprehensive analysis** before making any changes:
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```
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⚠️ Proxmox VE host detected!
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🔍 Proxmox Host Analysis
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========================
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📊 System Information:
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💾 RAM: 64GB (Used: 18GB, Available: 42GB)
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🖥️ CPU: 16 cores
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📦 Proxmox: pve-manager/8.0.4/8d2b43c4 (running kernel: 6.2.16-3-pve)
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🖥️ Workload:
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🖼️ VMs: 5 total (3 running)
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📦 Containers: 2 total (2 running)
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📊 Total VM memory allocated: 48GB
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📈 Memory overcommit: 75.0%
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💾 Storage:
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• local (dir): 145GB/450GB used
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• local-lvm (lvmthin): 892GB/1800GB used
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• backup (dir): 234GB/2000GB used
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⚙️ Current Kernel Parameters:
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📊 Memory:
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vm.swappiness: 60 (Proxmox recommended: 10)
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vm.dirty_ratio: 20 (Proxmox recommended: 10)
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vm.dirty_background_ratio: 10 (Proxmox recommended: 5)
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vm.vfs_cache_pressure: 100 (Proxmox recommended: 50)
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📡 Network:
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net.core.default_qdisc: pfifo_fast (Proxmox recommended: fq)
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net.ipv4.tcp_congestion_control: cubic (Proxmox recommended: bbr)
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🖥️ CPU Governor: ondemand (Recommended: performance)
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🗄️ ZFS Configuration:
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📊 Current ARC max: 32GB
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💡 Recommended: 16GB (25% of RAM, leaves more for VMs)
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🔍 Existing Optimizations:
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❌ No custom sysctl configuration
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✅ No tmpfs cache mounts (good for Proxmox)
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✅ No zram (good for Proxmox)
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📋 Assessment:
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⚠️ Kernel parameters not optimized for hypervisor workload
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⚠️ CPU governor not set to 'performance'
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⚠️ ZFS ARC could be limited to give VMs more RAM
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━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
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This tool has TWO modes:
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1️⃣ Proxmox Host Mode (Hypervisor Optimization)
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• Optimized kernel params for VM workloads
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• Minimal RAM allocation (2GB APT cache only)
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• CPU performance governor
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• ZFS ARC limiting (if applicable)
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• No desktop app configuration
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2️⃣ Desktop Mode (NOT recommended for host)
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• Heavy RAM usage (zram + tmpfs = 40-50%)
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• Desktop-focused optimizations
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• Will reduce memory available for VMs
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3️⃣ Abort (Recommended: Run inside your desktop VMs)
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Choose mode (1=Proxmox/2=Desktop/3=Abort) [1]:
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```
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---
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## What Each Section Tells You
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### 📊 System Information
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- **RAM Usage:** Shows how much RAM is used vs available
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- **CPU Cores:** Total cores available for VMs
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- **Proxmox Version:** Your current PVE version and kernel
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### 🖥️ Workload
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- **VM/CT Count:** Total and running instances
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- **Memory Allocation:** Total RAM allocated to all VMs
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- **Overcommit Ratio:** % of RAM you've allocated to VMs
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- <100%: Conservative (VMs won't use all their allocation)
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- 100-150%: Normal (ballooning will handle it)
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- >150%: Aggressive (monitor for memory pressure)
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### 💾 Storage
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- Shows all storage backends
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- Current usage per storage
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- Helps identify if you need more space
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### ⚙️ Kernel Parameters
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Compares **current** vs **recommended** for Proxmox:
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| Parameter | Default | Current | Proxmox Optimal |
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|-----------|---------|---------|-----------------|
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| vm.swappiness | 60 | ? | 10 |
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| vm.dirty_ratio | 20 | ? | 10 |
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| vm.dirty_background_ratio | 10 | ? | 5 |
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| vm.vfs_cache_pressure | 100 | ? | 50 |
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| qdisc | pfifo_fast | ? | fq |
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| tcp_congestion | cubic | ? | bbr |
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### 🖥️ CPU Governor
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- **ondemand/powersave:** CPU scales down when idle (saves power, adds latency)
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- **performance:** CPU always at max speed (better for VMs, ~2-5W more power)
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### 🗄️ ZFS Configuration
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- Shows current ARC (cache) size
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- Recommends 25% of RAM (leaves 75% for VMs)
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- Example: 64GB RAM → 16GB ARC, 48GB for VMs
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### 🔍 Existing Optimizations
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Detects if you've already optimized:
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- ✅ **Good:** No zram, no excessive tmpfs
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- ⚠️ **Warning:** Desktop optimizations found (uses VM RAM)
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### 📋 Assessment
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Quick summary of what needs attention:
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- ✅ Already optimal
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- ⚠️ Needs optimization
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---
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## What Gets Optimized
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When you choose **Mode 1 (Proxmox Host)**:
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### 1. Kernel Parameters
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```bash
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# Before
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vm.swappiness = 60
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vm.dirty_ratio = 20
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net.core.default_qdisc = pfifo_fast
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net.ipv4.tcp_congestion_control = cubic
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# After
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vm.swappiness = 10 ✅ Balanced for VMs
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vm.dirty_ratio = 10 ✅ Handles VM writes
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net.core.default_qdisc = fq ✅ Fair queue
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net.ipv4.tcp_congestion_control = bbr ✅ Better throughput
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```
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### 2. CPU Governor
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```bash
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# Before
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ondemand (scales with load)
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# After
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performance (always full speed)
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```
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### 3. ZFS ARC (if ZFS present)
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```bash
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# Before
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32GB (50% of RAM)
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# After
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16GB (25% of RAM)
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# Frees 16GB for VMs!
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```
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### 4. Optional: APT Cache (2GB tmpfs)
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```bash
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# Minimal RAM impact
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# Faster package updates
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```
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---
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## Example: Before vs After
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### Before Optimization:
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```
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RAM: 64GB total
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├─ Used by host: 18GB
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├─ ZFS ARC: 32GB (wasted for hypervisor)
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└─ Available for VMs: 14GB (only 22%!)
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CPU: Scaling down when idle (latency spikes)
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Network: Default cubic (suboptimal for VM traffic)
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Kernel: Desktop-optimized values
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```
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### After Optimization:
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```
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RAM: 64GB total
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├─ Used by host: 10GB (optimized)
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├─ ZFS ARC: 16GB (limited, still effective)
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└─ Available for VMs: 38GB (59%!)
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CPU: Always at full speed (predictable performance)
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Network: BBR congestion control (10-30% faster)
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Kernel: Hypervisor-optimized values
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```
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**Result:** ~24GB more RAM for VMs! 🚀
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---
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## When Analysis Shows "Already Optimized"
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If you see:
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```
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📋 Assessment:
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✅ System is already well-optimized for Proxmox!
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```
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The script will still run but make minimal changes. Safe to run anytime!
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---
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## Use Cases
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### Fresh Proxmox Install
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- Shows default values (usually suboptimal)
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- Recommends all optimizations
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- Big performance gain expected
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### Previously Optimized
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- Shows current settings
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- Confirms they're good
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- Maybe updates to newer recommendations
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### Mixed/Desktop Mode
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- Detects if you ran desktop optimizations before
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- Warns about zram/tmpfs using VM RAM
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- Can clean up or reconfigure
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---
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## Safety
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The analysis is **read-only** - it just shows information. No changes until you:
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1. Choose Mode 1 (Proxmox)
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2. Confirm each optimization
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You can abort at any time!
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---
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## Summary
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The new Proxmox analysis gives you:
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✅ **Complete system overview** before making changes
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✅ **Current vs recommended** parameter comparison
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✅ **VM workload context** (memory allocation, count)
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✅ **Storage status** at a glance
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✅ **Existing optimization detection**
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✅ **Clear assessment** of what needs work
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**Result:** You know exactly what will be optimized and why! 📊
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