What RAM buffer / minimum RAM values should I use?

Two RAM settings in the panel — Minimum RAM (Xms) and RAM Buffer (Xmx) — quietly control your server's stability. Getting them right prevents both instant crashes and out-of-memory crashes.

Where these live and what they do

Both values live in the Startup tab as variables:

• Xms (Minimum RAM) — the floor. It must never be higher than Xmx, or the server crashes instantly. Setting it equal to Xmx is a common, safe choice.
• RAM Buffer (Xmx) — reserves headroom to prevent out-of-memory crashes. The value you enter lowers the usable Xmx by that amount. Recommended buffer: 300–500MB for servers under 3GB, 1000–3000MB for 3–10GB+.

Setting them safely

1. Open the Startup tab.
2. Set Xms (Minimum RAM) — a safe choice is to match it to Xmx.
3. Set your RAM Buffer (Xmx) using the recommended ranges above.
4. Save and start from the Console.

Warning: The panel enforces that Xms ≤ Xmx. If your server "crashes instantly," check you didn't set the minimum above the max.

Frequently asked questions

Why does my server crash the moment it starts? Almost always because Xms (Minimum RAM) is set higher than Xmx — lower the minimum.

How big should the RAM buffer be? 300–500MB for servers under 3GB, and 1000–3000MB for 3–10GB+.