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ServerCore
What it is
ServerCore is a free, self-hosted mod for optimizing Minecraft servers and reducing lag spikes. It works on dedicated servers and in singleplayer. Its entity activation setting can reduce how many entities the server processes, and dynamic performance checks can adjust chunk-tick distance, view distance, simulation distance, and mobcaps based on tick time and configuration. Server owners can set spawn rates and mobcaps for each spawn group, add optional rules for reinforcements, spawners, and nether-portal random ticks, and limit breeding by mob type and radius. A chunk-ticking-distance setting narrows where mob spawning and random ticks occur. Commands cover reloads, settings, status, mobcaps, and statistics; configuration files are in the config/servercore directory. Changes that can affect vanilla behavior are disabled by default. Compatibility is listed for Fabric, Forge, and NeoForge, with Minecraft Java Edition versions from 1.17.1 through 1.21.x and 26.1.x, 26.2, and 26.3. The project is distributed through Modrinth and CurseForge.
For and against
For
- Free and self-hosted
- Supports dedicated servers and singleplayer
- Adjusts performance settings dynamically
- Vanilla-changing features are disabled by default
Against
- Requires self-hosting
- Configuration is managed through files in the config directory
The verdict
ServerCore provides adjustable server-side performance settings and mob controls, with vanilla-affecting changes off by default. Review its listed Minecraft versions and loader compatibility for your setup.
Who it suits
It suits Minecraft server operators seeking configurable performance adjustments, as well as players using it in singleplayer. It supports dedicated servers and multiple listed mod loaders.
On the record
- Breeding caps
- Breeding Caps limit how many mobs of the same type can be bred within a specified radius.github.com · read 1 Oct 2026
- Chunk ticking
- The chunk-ticking-distance setting reduces the distance at which chunks perform mob spawning and random ticks.github.com · read 30 Sep 2026
- Commands
- The mod provides /servercore reload, /servercore settings, /servercore status, /mobcaps and /statistics commands.github.com · read 30 Sep 2026
- Configuration
- Configuration files are config.yml and optimizations.yml in the config/servercore folder.github.com · read 1 Oct 2026
- Default behavior
- Changes that can affect vanilla behavior are disabled by default.github.com · read 30 Sep 2026
- Distribution
- The project is distributed through Modrinth and CurseForge and links to both from its README.raw.githubusercontent.com · read 1 Oct 2026
- Dynamic checks
- Dynamic performance checks can adjust chunk-tick distance, view distance, simulation distance and mobcaps according to tick time and configuration.github.com · read 1 Oct 2026
- Entity activation
- Entity Activation Range reduces the number of entities processed by the server and is based on Spigot and PaperMC implementations.github.com · read 1 Oct 2026
- Lag reduction
- It includes patches and optimizations intended to improve performance and reduce lag spikes.github.com · read 1 Oct 2026
- Latest listed file
- CurseForge lists ServerCore NeoForge 1.5.20+26.3 as the latest release, dated September 16, 2026.curseforge.com · read 1 Oct 2026
- License
- Modrinth lists ServerCore as MIT licensed, while the repository states that some files using patches are GPL-3.0 and all other files are MIT licensed.modrinth.com · read 1 Oct 2026
- Loaders
- The project lists Fabric, Forge and NeoForge as supported platforms.modrinth.com · read 1 Oct 2026
- Minecraft versions
- Modrinth lists support from Minecraft Java Edition 1.17.1 through 1.21.x, 26.1.x, 26.2 and 26.3.modrinth.com · read 30 Sep 2026
- Mob controls
- Configurable mob spawning supports per-spawngroup spawn rates and mobcaps, with optional rules for reinforcements, spawners and nether-portal random ticks.github.com · read 30 Sep 2026
- Mob spawning
- Mob-spawning configuration allows spawn rates and vanilla mobcaps to be modified for each spawn group.github.com · read 1 Oct 2026
- Purpose
- ServerCore is a Minecraft mod that aims to optimize the Minecraft server.github.com · read 1 Oct 2026
- Support
- The project README links to a Discord server, and Modrinth links to GitHub issue reporting.raw.githubusercontent.com · read 1 Oct 2026
- Supported use
- The mod works on dedicated servers and in singleplayer.github.com · read 1 Oct 2026