GTA 6 Server Optimization

Basic optimization is obvious: upgrade the CPU, move to NVMe, enable DDoS. Advanced optimization is where the real wins happen. If you have done the basics and your server still feels slow, here is the next layer.

Profile before you optimize

Every guide that recommends optimizations without profiling first is wrong. The script you think is slow is usually fine. The script you forgot about is the one eating 40% of CPU. Use a profiler.

• FXServer has built-in resmon (F11 in-game) showing per-resource CPU cost on GTA 5. Expect similar for GTA 6.
• Database slow query log shows which SQL queries are costing you.
• Linux perf top and pidstat show what the OS is spending CPU on.

Database tuning wins

Most "server is slow" problems are actually database problems. Check these:

1. Slow query log. Any query over 100 ms is a problem.
2. Missing indexes. Your player lookup by Discord ID should be indexed.
3. Connection pool exhaustion. If scripts hang, check your max_connections.
4. Table bloat. Vacuum periodically if using Postgres. OPTIMIZE TABLE occasionally on MariaDB.

Tuning the database often doubles effective server capacity.

Resource limits per script

Some resources (scripts) cost more than others. If one script takes 8 ms per tick, and another takes 0.2 ms, you know where to focus. Common offenders:

• Polling loops that run every tick instead of every second.
• Entity queries that scan every vehicle on the server.
• Heavy string operations in hot paths.
• Synchronous database calls blocking the main thread.

Streaming and entity budget

Reduce what the game needs to replicate.

• Cull NPCs aggressively.
• Limit dynamic object spawns.
• Tune streaming distances by player class (pedestrians do not need 500 m view distance).
• Clean up vehicles on abandonment rather than letting them persist.

Caching

Cache what does not need fresh data every request.

• Player stats (read from cache, write to database on change).
• Frequently-read config values.
• Whitelisted player lists.
• Geolocation data.

Redis on the same machine is fine for most GTA servers. 50 ms lookup beats 5 ms lookup when the 5 ms one happens 1000 times per tick.

Common mistakes in optimization

• Upgrading hardware before profiling. You hide the real problem.
• Tuning defaults that were fine. Most default configs are sensible.
• Over-optimizing non-hot code. Save the effort for the slow paths.
• Not measuring after changes. "It feels faster" is not optimization.

Related reading

For the basics, see our performance guide. For CPU specifically, read the CPU bottleneck guide. For latency tuning, see the latency optimization guide.