VEIN servers often use very high amounts of RAM, especially on active multiplayer servers with large worlds, many zombies or long uptimes. This can look like a memory leak, but most of the time it is normal behaviour caused by Unreal Engine and VEIN's early development state. This guide explains why VEIN uses so much RAM and how to reduce memory usage safely.
Works on all HostByte VEIN servers. Updated for VEIN v0.022h8
Step 1 Understand VEIN's RAM Usage
VEIN is built on Unreal Engine 5 and has no built in RAM cap. The server will use as much memory as it needs for:
- World streaming
- Zombie AI calculations
- Player inventory and character data
- Physics and replication
- Persistent world data
For medium or large servers, 10 GB to 14 GB of RAM usage is normal. This is not a leak by itself.
HostByte Note: Our VEIN hosting plans include unmetered RAM so your server will not be throttled or shut down for heavy usage.
Step 2 Restart the Server Regularly
Because VEIN is still in development, RAM usage naturally rises over time. Restarting the server is the easiest and most effective fix.
Recommended restart schedule:
- Small servers: every 12 to 24 hours
- Medium servers: every 6 to 12 hours
- Large or high population servers: every 3 to 6 hours
You can set scheduled restarts in the HostByte panel so your server resets automatically so very minimal downtime.
Step 3 Reduce Zombie AI Load
Zombie AI is the single biggest source of increased memory usage. The following CVars help reduce load by improving AI efficiency.
[ConsoleVariables]
vein.AI.AsyncSensing=1
vein.AISpawner.EnableVirtualization=1
vein.AI.EnablePathUpdates=1
vein.AI.PathUpdateRate=0.5
- Async detection
- Virtualizes distant zombies
- Optimizes pathing
Step 4 Reduce Rendering Overhead on the Server
Servers do not need rendering, lighting or shadows. Disabling them reduces CPU load and stabilizes RAM usage.
r.VolumetricFog=0
r.Fog=0
r.ShadowQuality=0
r.ViewDistanceScale=0
r.Lumen.HardwareRayTracing=0
r.Lumen.Reflections=0
Step 5 Reduce Network Replication Load
High player counts and zombie activity increase network pressure which indirectly increases RAM usage.
p.NetEnableMoveCombining=1
p.NetUsePredictiveOverlaps=1
p.NetUseClientPreReplication=1
net.UseAdaptiveNetUpdateFrequency=1
net.IsStandbyCheckingEnabled=0
net.PingExcludeFrameTime=1
Step 6 Improve Garbage Collection Efficiency
Unreal Engine cleans up unused objects through GC. These settings make it more aggressive.
gc.TimeBetweenPurgingPendingKillObjects=30
gc.AllowParallelGC=1
Step 7 Lower Zombie Population Cap
Reducing the number of zombies active in the world can lower memory usage significantly.
vein.AISpawner.SpawnCapMultiplierZombie=0.7
Values between 0.6 and 1.0 provide good performance balance.
Step 8 Check Save Files for Corruption
Very large save files, corrupted structures or massive zombie clustering can cause memory spikes. If your world loads slowly or crashes:
- Backup your save
- Try loading an older backup
- Test with a fresh world to compare usage
If a new world uses half the RAM, the old save may be damaged.
Troubleshooting
- Memory rises endlessly: VEIN is still early access, restarts prevent buildup.
- Server crashes when RAM maxes: Lower zombie cap or restart more frequently.
- RAM spikes during combat: Reduce AI and pathing settings.
- Over 16 GB usage on a quiet server: Possible corrupted save or stuck AI loop.
Next Steps
Getting Help
- Knowledge Base: Explore more VEIN hosting guides for configuration, gameplay settings and troubleshooting.
- Support Ticket: Open a ticket from your HostByte account if you need assistance.
- Discord: Join our community below.
- Status Page: Check live updates at status.hostbyte.net.
