Commands
| Command | Description |
|---|---|
/cm |
Open GUI |
/cm help |
List every command |
/chunkstatus |
View performance stats |
/chunkreload |
Reload config |
/optimizechunks |
Force chunk optimization |
/chunkgc |
Free up memory |
/chunksummary |
World analysis |
/maintenance <on|off|auto|status> |
Toggle maintenance mode |
/chunklang <lang> |
Change language |
/chunkanalyze [world] |
Analyze chunk complexity |
/chunkregions |
Region stats |
/chunkmetrics |
Advanced metrics |
/cmtop |
Most expensive loaded chunks |
/cminspect |
Why your current chunk is kept loaded |
/cmfreeze <add|remove|list|clear> |
Pin chunks so they never unload |
/cmpregen <start|stop|status|resume> [radius] |
Pre-generate chunks |
/cmviz |
Chunk border particles coloured by heat |
/cmrtps |
Per-region TPS (Folia) |
/cmmap <refresh|on|off> |
Dynmap/BlueMap hot-chunk overlay |
Permissions
| Permission | Description | Default |
|---|---|---|
chunkmanager.admin |
All commands | op |
chunkmanager.notify |
Performance notifications | op |
chunkmanager.bypass |
Never marked AFK, no loading limits | false |
chunkmanager.radius.1 to chunkmanager.radius.6 |
Per-rank preload radius | false |
Features
- Heat-Based Unloading - Tracks activity, unloads cold chunks
- Auto Performance Adjust - Adapts to TPS/RAM automatically
- Chunk Prefetching - Predicts where players go, preloads chunks
- Region Optimization - Optimizes areas based on activity
- Smart Caching - Fast chunk reloading
- Live Monitoring - TPS, memory, cache stats
- Multi-Language - en, es, fr, de, pt, it, ru, ja, ko, zh, ar
- Developer API - Hook into it from your plugins
- World Blacklist - Exclude worlds you don't want managed
- Folia Support - Runs on Folia, Paper, Spigot and Bukkit 1.20.4 - 1.21.x
- AFK Saver - Idle players load fewer chunks, restored the moment they move
- Entity Limiter - Per-chunk caps for mobs, animals and items, named and tamed always safe
- Pre-Generation - TPS-aware, resumable, skips chunks that already exist
- Frozen Chunks - Pin any chunk so it never unloads
- Top Chunks & Analyzer - See which chunks cost the most and why
- Region TPS - Per-region tick times on Folia
- Map Overlay - Hot chunks drawn on Dynmap and BlueMap
- Respects Other Plugins - Never unloads force-loaded chunks, plugin tickets, WorldGuard regions or a running Chunky
- PlaceholderAPI - TPS, chunks, AFK and per-chunk values for scoreboards and tab lists
PlaceholderAPI
Values are cached once a second, so they are safe in scoreboards and tab lists.
Server placeholders
| Placeholder | Returns |
|---|---|
%chunkmanager_tps% |
Current TPS |
%chunkmanager_tps_color% |
TPS with a green/yellow/gold/red colour |
%chunkmanager_tick% |
Tick time in ms |
%chunkmanager_tick_p95% |
Tick time p95 over the last 5 minutes |
%chunkmanager_status% |
EXCELLENT, GOOD, MODERATE, POOR or CRITICAL |
%chunkmanager_platform% |
Folia, Paper, Spigot or Bukkit |
%chunkmanager_memory_used% |
Used memory in MB |
%chunkmanager_memory_max% |
Max memory in MB |
%chunkmanager_memory_percent% |
Memory usage in percent |
%chunkmanager_chunks% |
Loaded chunks across all worlds |
%chunkmanager_world_chunks_<world>% |
Loaded chunks in one world |
%chunkmanager_chunks_queue% |
Chunks waiting to load |
%chunkmanager_chunks_loading% |
Chunks loading right now |
%chunkmanager_loads_per_minute% |
Chunk loads in the last minute |
%chunkmanager_unloads_per_minute% |
Chunk unloads in the last minute |
%chunkmanager_culled% |
Entities removed by the limiter |
%chunkmanager_frozen% |
Frozen chunks |
%chunkmanager_radius% |
Current preload radius |
%chunkmanager_maintenance% |
yes/no |
%chunkmanager_afk_count% |
Players currently AFK |
%chunkmanager_worst_region% |
Slowest region in ms (Folia) |
%chunkmanager_pregen_active% |
yes/no |
%chunkmanager_pregen_percent% |
Pre-generation progress |
Player placeholders
| Placeholder | Returns |
|---|---|
%chunkmanager_afk% |
yes/no |
%chunkmanager_idle_seconds% |
Seconds since the player last moved |
%chunkmanager_player_radius% |
The player's preload radius |
%chunkmanager_bedrock% |
yes/no (Geyser) |
%chunkmanager_chunk_x% |
Chunk X the player stands in |
%chunkmanager_chunk_z% |
Chunk Z the player stands in |
%chunkmanager_chunk_heat% |
Heat of that chunk |
%chunkmanager_chunk_cost% |
Cost score of that chunk |
%chunkmanager_chunk_entities% |
Entities in that chunk |
%chunkmanager_chunk_tiles% |
Tile entities in that chunk |
%chunkmanager_chunk_frozen% |
yes/no |
Developer API
Setup
depend: [ChunkManager]
Get API
ChunkManagerAPI api = (ChunkManagerAPI) Bukkit.getPluginManager().getPlugin("ChunkManager");
Methods
// Basics
api.getCurrentRadius();
api.isMaintenanceMode();
api.setMaintenanceMode(true);
// Per-player
api.setPlayerRadius(player, 8);
api.getPlayerRadius(player);
// Stats
api.getAverageTickTime();
api.getMemoryUsagePercentage();
api.getLoadedChunksCount();
// Actions
api.forceChunkOptimization();
api.forceGarbageCollection();
api.reloadConfiguration();
// Async
api.getWorldStatistics(world); // returns CompletableFuture
// Extra
api.getCurrentTps();
api.isBedrockPlayer(player);
api.getQueuedChunksCount();
config.yml
chunk-loading-radius: 3
cache-expiration-time: 30000
max-chunks-to-load: 5
max-cache-size: 100
logging-level: INFO
language: en
afk:
enabled: true
idle-seconds: 300
radius: 1
view-distance: 0
entity-limiter:
enabled: false
total-limit: 100
spawn-chunks:
radius: -1
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