Clearlag | Folia & Paper v1.0.3

Lightweight Folia-safe entity clearlag sweep, chunk limits & global caps.
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SigmaClearlag
Lightweight Folia-safe entity clearlag sweep, chunk limits & global caps.

🧹 Auto Sweep 🌐 Full Folia Support 📦 Chunk Limits 🌍 Global Caps 🔗 PlaceholderAPI


Overview​

SigmaClearlag is a lightweight, zero-dependency entity clearlag plugin built from the ground up for both Paper and Folia. It runs a configurable countdown and sweeps your server clean of ground items, XP orbs, projectiles, excess mobs, and empty vehicles then enforces per-chunk and server-wide entity caps to keep your TPS healthy long-term.

On Folia every operation is dispatched to the correct region thread: chunk cleanup runs via RegionScheduler, entity removal via EntityScheduler, and broadcasts via GlobalRegionScheduler fully thread-safe with zero region violations. On Paper the standard scheduler is used with chunk scanning batched across ticks to avoid main-thread spikes.

Features​

⏱ Countdown & Warnings​

  • Configurable interval any value in seconds (default 300s / 5 min)
  • Warning broadcasts alerts players at 60s · 30s · 10s · 5s (fully customisable list)
  • Formatted time warnings display human-readable time, e.g. 1m 30s
  • Force trigger /lag clear fires an instant cleanup on demand
  • Hot reload /lag reload restarts the scheduler with new config values without a server restart

🧹 Phase 1 Fast Sweep​

  • Ground items removes all dropped items; per-material whitelist (DIAMOND, NETHERITE_INGOT, ELYTRA, etc.)
  • XP orbs instant removal of all experience orbs
  • Projectiles clears arrows, snowballs, fire charges; per-type exclude list (TRIDENTs kept by default)
  • Mob sweep optional mass-removal of hostile/neutral mobs with an exclude list
  • Empty vehicles optional removal of unoccupied boats and minecarts with an exclude list

📦 Phase 2 Per-Chunk Limits​

  • Per-type mob caps set individual limits for ZOMBIE, SKELETON, SPIDER, CREEPER, etc.
  • Default mob max fallback limit for any mob type not explicitly listed
  • Vehicle caps per-type limits for MINECART, CHEST_MINECART, HOPPER_MINECART, etc.
  • Total chunk cap hard ceiling on all limited entities in one chunk (removes most-populous type first)
  • Paper: scan is batched across ticks (configurable scan_chunks_per_tick) to avoid main-thread spikes
  • Folia: each chunk is processed in its own RegionScheduler task correct by design

🌍 Phase 3 Global Entity Limits​

  • Server-wide cap per entity type runs after the chunk pass, so local density has already been reduced
  • Density-first removal excess entities are removed starting from the most-crowded chunks
  • Exclude list IRON_GOLEM, ENDER_DRAGON, WITHER, etc. are always skipped
  • Folia-safe removal dispatched via entity.getScheduler().run() per entity

🛡 Smart Entity Protection​

  • Named entities any entity with a custom name tag is never removed
  • Tamed pets wolves, cats, horses, parrots and other tamed animals are always safe
  • Villagers villagers and wandering traders are excluded
  • Armor stands protected by default
  • Leashed mobs any mob on a leash is kept
  • Ridden entities any entity a player is actively riding cannot be removed

📊 PlaceholderAPI​

  • %lag_next_cleanup% formatted time remaining, e.g. 2m 15s
  • %lag_seconds_left% raw integer seconds until next cleanup
  • %lag_last_removed% entity count from the last cleanup run

Commands & Permissions​

CommandAliasesDescriptionPermission
/lag clear/clearlag clear · /scl clearImmediately trigger entity cleanupsigmaclearlag.clear
/lag info/clearlag info · /scl infoShow next cleanup time & last removed countsigmaclearlag.info
/lag reload/clearlag reload · /scl reloadHot-reload config and restart schedulersigmaclearlag.reload

Permission Nodes​

  • sigmaclearlag.clear manually trigger cleanup (default: op)
  • sigmaclearlag.info view timer status and stats (default: true)
  • sigmaclearlag.reload reload configuration (default: op)

Configuration Highlights​

YAML:
# ╔══════════════════════════════════════════╗
# ║       SigmaClearLag  Configuration       ║
# ║   Folia-compatible lightweight clearlag  ║
# ╚══════════════════════════════════════════╝
# ── Schedule ───────────────────────────────────────────────────────────────────
schedule:
  interval: 300              # seconds between auto-cleanups  (minimum: 10)
  warnings: [3,2,1] # warn players this many seconds before cleanup
# ── Messages ───────────────────────────────────────────────────────────────────
# Supports &a &c &e &l etc. color codes.
#   {time}  → formatted time remaining, e.g. "1m 30s"  (warning only)
#   {count} → number of entities removed               (cleared only)
messages:
  warning: "&6⏳ &fEntities will be cleared in &e{time}&f!"
  cleared: "&a✔ &fCleared"
# ── Protection ─────────────────────────────────────────────────────────────────
# Entities matching ANY enabled rule are NEVER removed by anything below.
protection:
  named:        true   # any entity with a custom name tag
  tamed:        true   # tamed pets (wolves, cats, horses, parrots…)
  villagers:    true   # villagers and wandering traders
  armor_stands: true   # armor stands
  leashed:      true   # mobs currently on a leash
  ridden:       true   # any entity a player is actively riding
# ── Sweep ──────────────────────────────────────────────────────────────────────
# Fast server-wide pass that runs on every cleanup.
# Removes ALL matching entities in one go. Protection rules above always apply.
sweep:
  items:
    enabled: true
    # Item types that will NEVER be removed (Bukkit Material names, uppercase).
    whitelist:
      # - DIAMOND
      # - DIAMOND_BLOCK
      # - NETHERITE_INGOT
      # - NETHERITE_SCRAP
      # - NETHER_STAR
      # - ELYTRA
      # - TOTEM_OF_UNDYING
  xp_orbs:
    enabled: true
  projectiles:
    enabled: true
    # Projectile entity types that will NOT be removed.
    exclude:
      - TRIDENT
  mobs:
    enabled: false
    # Mob types that will NOT be removed by the sweep.
    exclude:
      - IRON_GOLEM
      - SNOW_GOLEM
      - WITHER
      - ENDER_DRAGON
      - ELDER_GUARDIAN
  # Removes empty (unoccupied) boats and minecarts.
  # Vehicles with a player riding them are always kept (see protection.ridden).
  vehicles:
    enabled: true
    # Vehicle types that will NOT be removed.
    exclude:
      - HOPPER_MINECART
      - MINECART
      - CHEST_MINECART
# ── Limits ─────────────────────────────────────────────────────────────────────
# Two-stage limiting system that runs AFTER the sweep above.
#
#  per_chunk  →  scans each loaded chunk; removes excess of any type locally
#  global     →  counts each type across the entire server; removes excess
#                starting from the most-crowded chunks
#
# Both stages can be used together (recommended) or independently.
limits:
  # Per-chunk limit — prevents pile-ups at grinders and spawner farms.
  per_chunk:
    enabled: true
    # Fallback limit for any mob type not listed under 'mobs' below.
    default_mob_max: 20
    total_max: 20
    # Per-type mob limits.  Types NOT listed here fall back to default_mob_max.
    mobs:
      # ZOMBIE:   10
      # SKELETON: 10
      # SPIDER:   8
      # CREEPER:  5
      # PHANTOM:  4
    # Per-type vehicle limits (boats, minecarts).
    # ONLY types listed here are capped — unlisted vehicles are left alone.
    vehicles:
      MINECART:        5
      CHEST_MINECART:  5
      HOPPER_MINECART: 5
      # OAK_BOAT: 5
    # Entity types skipped entirely by the chunk scanner (not counted, not removed).
    exclude:
      # - IRON_GOLEM
      # - SNOW_GOLEM
      - WITHER
      - ENDER_DRAGON
      - ELDER_GUARDIAN
    # Paper only — how many chunks to process per tick during the scan.
    # Ignored on Folia. Lower = smoother server; higher = faster cleanup.
    scan_chunks_per_tick: 20
  # Global limit — hard server-wide cap per entity type.
  # Runs AFTER per_chunk so local cleanup reduces density first.
  global:
    enabled: false
    # Entity types skipped by global enforcement.
    exclude:
      - IRON_GOLEM
      - SNOW_GOLEM
      - WITHER
      - ENDER_DRAGON
      - ELDER_GUARDIAN
    # Total cap across ALL worlds combined. Works for mobs and vehicles.
    caps:
      ZOMBIE:   300
      SKELETON: 200
      SPIDER:   150
      CREEPER:  100
      PHANTOM:   50
      SLIME:    100
      ENDERMAN: 100
      # MINECART: 50
      # OAK_BOAT: 30


Technical Details​

  • Server software: Paper 1.21+ and Folia fully region-safe
  • Java version: Java 21
  • Hard dependencies: None
  • Soft dependencies: PlaceholderAPI (optional)
  • Folia thread model: Countdown → AsyncScheduler · Chunk cleanup → RegionScheduler · Entity removal → EntityScheduler · Broadcasts → GlobalRegionScheduler
  • Paper batching: Chunk scan spread across ticks via configurable scan_chunks_per_tick no main-thread spike
  • 3-phase cleanup order: Fast sweep → Per-chunk limits → Global entity caps
  • Hot reload: /lag reload cancels the running scheduler, reloads config, and starts a fresh countdown
  • Keyed entity types: Entity type identity resolved via getType().getKey().getKey() stable across all Paper/Folia 1.21.x versions including the 1.21.4 EntityType restructure



SigmaClearlag is provided as-is. Bug reports and feature requests are welcome.
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EULA: Free EULA
425 Views
31 Downloads
Apr 3, 2026 Published
Jun 1, 2026 Updated
Not yet rated
42 KB File size
Open source
  1. No
DRM-free
  1. Yes
Unobfuscated
  1. Yes
Type
  1. Gameplay
  1. Optimization
Game mode
  1. Survival
  1. Donut-like
Supported software
  1. Bukkit
  1. Spigot
  1. Paper
  1. Folia
Supported versions
  1. 1.21.11
  1. 1.21.8
  1. 1.21.5
  1. 1.21.4
  1. 1.21.2
  1. 1.21
Supported languages
  1. This product doesn't contain text
Creator
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31 Downloads
Apr 3, 2026 Published
Jun 1, 2026 Updated
Not yet rated
42 KB File size
Open source
  1. No
DRM-free
  1. Yes
Unobfuscated
  1. Yes
Type
  1. Gameplay
  1. Optimization
Game mode
  1. Survival
  1. Donut-like
Supported software
  1. Bukkit
  1. Spigot
  1. Paper
  1. Folia
Supported versions
  1. 1.21.11
  1. 1.21.8
  1. 1.21.5
  1. 1.21.4
  1. 1.21.2
  1. 1.21
Supported languages
  1. This product doesn't contain text
Creator
Struggling to cover the costs of your server? Set up your own webstore with Tebex in under 30 seconds.
Host a lag-free Minecraft or Hytale server in minutes.
Get 25% off your first order with our link.
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Create items, blocks, mobs, emojis, and more with automatic resourcepack generation!
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