SimpleMobStacker is a powerful yet lightweight Bukkit/Spigot plugin that dramatically reduces server lag and clutter by automatically grouping (“stacking”) identical mobs and dropped items into single entities. It’s highly configurable, offers admin commands, and even includes debug and statistics features—all to give you a cleaner, smoother Minecraft experience.

Core Features

• Mob Stacking
  • Automatically merges nearby mobs (natural spawns, spawner spawns, or egg spawns) of the same type into a single “master stack”
    
    
  • Enforces configurable rules: same age, same health if desired, per-world blacklists, and a maximum stacks-per-chunk limit
    
    
  • Custom name tags show stack size (e.g. §e10x §fzombie), with drop-multiplication and respawn handling to preserve gameplay
• Item Stacking
  • Aggregates identical on-ground items into large virtual stacks (configurable up to 1,000+)
    
    
  • Players picking up a stacked item receive the full quantity at once, with overflow handled gracefully
    
    
  • Displays stack size via custom name (e.g. §b250x §firon ingot)
• Admin Tools & Commands
  • /sms reload to reload your configuration without restarting
    
    
  • /sms clear to instantly dismantle all stacks and reset names
    
    
  • /sms stats to view current mob/item stack counts and memory usage
    
    
  • /sms debug to toggle debugging messages and inspect individual stack sizes on interact
• Smart Performance & Cleanup
  • Asynchronous, chunk-focused stacking task—only processes loaded chunks near players
    
    
  • Regular cleanup task removes stale entries for entities that die or unload
    
    
  • Configurable stack radius, player-detection radius, and maximum stack sizes prevent abuse and preserve balance
• Fully Customizable via config.yml
  • Choose which entity types stack, set per-world blacklists, adjust radii, limits, intervals, and toggle every feature
    
    
  • Enable or disable health/age matching, stack absorption, debug mode, and more