LagSentinel

LagSentinel is a lightweight Minecraft server performance management plugin designed to automatically detect extreme lag, purge lag sources (dropped items & entity spam), freeze heavy redstone machinery, and secure the server against potential crashes using a live countdown system and emergency auto-restart.

Key Features

Dual-Tier Emergency Countdown:

Critical Mode (TPS <= 10.0): Initiates a 45-second countdown with live broadcasts to the action bar of all players before automatically restarting the server.

Extreme Mode (TPS <= 2.0): Triggers an emergency fast-restart within 5 seconds when the server experiences total lag or near-crashes.

Smart Lag Purge:

Automatically cleans up stacked dropped items across all worlds.

Removes wild monsters/mobs without nametags periodically when TPS drops.

Nametag Overflow Protection: Safely exempts named mobs, but automatically caps and purges excess entities if extreme spam/stacking occurs (>15 named mobs in a single chunk).

Auto-Freeze Redstone:

Tracks real-time redstone signal changes (BlockRedstoneEvent) per chunk.

Automatically freezes redstone flow in overloaded chunks (>30 redstone changes in 5 seconds or >50 entities).

Live Action-Bar Alerts:

Delivers real-time warning updates directly to all players' screens every second when the server enters an emergency state.

Commands & Permissions:

/lagsentinel resume_redstone Unfreezes redstone flow across all locked chunks.

Permission:

lagsentinel.admin (OP)

/lagsentinel toggle Toggles the automatic TPS monitoring system on or off

Permission:

lagsentinel.admin (OP)

Why should you download it?

Unlike typical heavy optimization plugins that ruin the vanilla experience-such as completely breaking item farms, limiting useful mechanics like rocket fireworks, or artificially capping mob behaviors-LagSentinel focuses purely on precision and safety. It doesn't interfere with your gameplay or restrict fun mechanics during normal play; it only steps in as an intelligent safety net during actual server emergencies, freezing only the specific overloaded chunks and purging only excessive lag spam while keeping your legitimate builds, items, and farms completely intact.

Credits :

• NotToastCat : helper
• verityfanchk67 : tester