Best Optimization Tips for a Stable FiveM Server

Running a FiveM server can be challenging, especially when dealing with lag, crashes, and performance drops. A well-optimized server ensures a smooth experience for players and improves overall stability. Here are the best optimization tips with practical examples to help you get the most out of your FiveM server.

1. Optimize Server Resources

Every script and resource running on your server consumes CPU, RAM, and bandwidth. Managing these efficiently can significantly improve performance.

Example: Instead of loading all scripts at startup, use the ensure command to start only essential resources and load others dynamically when needed.

• Use start resource_name only when required.
• Regularly audit your resources using the txAdmin performance monitor.
• Remove unused or poorly optimized scripts.
• Optimize loops in scripts by reducing the frequency of checks and events.
• Use SetTimeout instead of while true do loops for better CPU management.
• Cache frequently used data to avoid redundant database queries.

2. Reduce Streaming Load

High-resolution assets like vehicles, skins, and maps can cause client lag. Optimizing these assets reduces loading times and improves performance.

Example: If your server uses a 4K car model, downscale textures to 1024×1024 without losing too much detail.

• Compress .ytd textures using OpenIV.
• Avoid excessive custom MLOs (interiors) as they increase CPU usage.
• Use lightweight vehicle packs instead of heavy individual models.
• Reduce the number of streamed props and objects in the world.
• Implement LOD (Level of Detail) models for custom assets to improve rendering performance.

3. Optimize Database Queries

A slow database can bottleneck your server’s performance, causing lag during player interactions.

Example: If your server saves player positions every 5 seconds, change the update frequency to every 30 seconds to reduce query load.

• Index frequently accessed tables in your database.
• Avoid unnecessary SQL queries inside frequently executed events.
• Use async queries to prevent blocking server threads.
• Batch database queries instead of running individual updates.
• Cache player data in scripts to reduce the number of database reads.
• Use stored procedures for repetitive queries to reduce processing overhead.

4. Control AI & NPC Density

Excessive NPCs and vehicles create unnecessary CPU load and can slow down your server.

Example: If your server is roleplay-focused, reduce pedestrian density using SetPedDensityMultiplierThisFrame(0.2).

• Adjust population_density.cfg settings.
• Disable AI traffic in areas where it’s unnecessary.
• Use the onesync feature to better manage entity streaming.
• Implement a despawn system for idle NPCs and vehicles.
• Use server-side AI control instead of relying on client AI calculations.

5. Monitor and Reduce Client-side Lag

A server’s performance isn’t just about backend optimization. High client-side load can also cause lag.

Example: Players with low-end PCs may struggle with heavy weather effects. Use SetWeatherTypeNowPersist('EXTRASUNNY') to stabilize FPS.

• Limit high-particle effects like rain and snow.
• Optimize HUD and UI elements for smooth rendering.
• Provide players with a guide to optimize their FiveM settings.
• Reduce the number of draw calls by merging UI elements where possible.
• Use lightweight shaders and avoid excessive post-processing effects.

6. Optimize Network Performance

Network lag can cause desynchronization between players, leading to rubberbanding and delayed interactions.

Example: Reduce the frequency of player position updates to decrease server bandwidth usage.

• Use onesync settings to manage entity streaming more efficiently.
• Reduce network event spam by batching updates.
• Compress large data packets before sending them over the network.

7. Reduce Script Execution Time

Poorly optimized scripts can lead to high CPU usage and lag spikes.

Example: If a loop runs every 100ms but doesn’t need to, increasing the interval to 500ms can improve performance.

• Profile script execution with profiler record to find bottlenecks.
• Reduce event calls that run too frequently.
• Use Citizen.Wait() inside loops to avoid unnecessary CPU load.

8. Improve Garbage Collection

Memory leaks and excessive garbage collection cycles can slow down performance.

Example: If you spawn and delete objects frequently, ensure they are properly removed from memory.

• Call collectgarbage() at optimized intervals.
• Avoid creating unnecessary objects in tight loops.
• Use object pooling where possible.

9. Optimize Player Sync and Position Updates

Frequent position updates for every player can cause unnecessary server strain.

Example: If your server doesn’t need millisecond-precise player tracking, update positions every 500ms instead of every frame.

• Use SetPlayerRoutingBucket to split players into smaller sync groups.
• Reduce the update rate of non-critical player data.
• Implement client-side interpolation to smooth out movements instead of relying on constant server updates.

Final Thoughts

Optimizing your FiveM server is an ongoing process that requires regular monitoring and adjustments. By implementing these tips, you’ll ensure a stable and lag-free experience for your players. Regularly check your server logs, update your scripts, and encourage feedback from your community to keep improving.

Need further help? Join the FiveM forums or use txAdmin for in-depth performance tracking.

Did you find these tips helpful? Share your experience in the comments below!