Slimefun is a popular Minecraft plugin that transforms the vanilla game into a modpack-like experience without requiring client-side mods. It introduces a vast array of new items, mechanics, and gameplay features, focusing on technology, magic, and automation, to enhance survival gameplay on servers running Minecraft versions 1.14 to 1.21.5 (as of July 21, 2025). Designed for Bukkit, Spigot, or Paper servers, Slimefun adds depth to crafting, resource gathering, and exploration, appealing to players who enjoy complex systems and progression.
Check it out at: https://github.com/Slimefun/Slimefun4
This section outlines the limits on placing Slimefun blocks (including addon blocks) on the Slimefun Survival server. These limits help maintain server performance and balance gameplay. Each block or group of blocks has a default limit, but players with specific permissions can place more. Check here for details on each block group, their default limits, and how permissions can increase these limits.
Click here for a complete breakdown.
The block limits outlined here serve as an initial framework and will be fine-tuned over time based on community feedback. We’ve set these limits conservatively to ensure a balanced gameplay experience, as it’s simpler to increase limits as needed rather than reduce them, which can frustrate players. To suggest adjustments to these block limits, please visit our Discord server and create a forum post. We welcome constructive feedback; complaints without actionable suggestions/feedback will not be considered.
Slimefun’s block limits are necessary due to its inefficient block storage system, which loads every placed block (e.g., Electric Dust Fabricators or Output Chests or ANY Exotic Garden Plant) into server memory on startup, regardless of chunk activity, causing prolonged restarts and performance strain on large public servers. A promised rewrite to fix this issue, awaited for over five years, has not happened. These per-chunk limits balance player enjoyment with server stability, preventing excessive block placement (e.g., 5,000 Output Chests in one chunk) that could crash the server due to running out of memory. Set conservatively to avoid later reductions, limits can be adjusted based on constructive feedback submitted via forum posts on our Discord.