DedicatedMC
Guide
Running a Create mod server
How to host a Create mod server: picking version and loader, config caps for contraptions and trains, SMP rules, spark profiling and backups.
Topic
Modded
DedicatedMC
Guide
Performance mods for a modded server
The categories of server-side performance mods worth knowing for modded Minecraft, and why they do not lift the single-thread ceiling.
DedicatedMC
Guide
Optimising a modded Minecraft server
Why modpacks cost so much more per tick, and the practical steps that bring a modded Minecraft server under control, from pregen to caps and heap sizing.
DedicatedMC
Guide
How to set up a modpack server
How to set up a Minecraft modpack server in order, matching the pack, loader and version, allocating memory, and keeping client and server mods in sync.
DedicatedMC
Guide
Fixing a modded Minecraft server that won't start or keeps crashing
How to read the logs and fix a modded Minecraft server that will not start, from version mismatches and missing dependencies to a single broken mod.
DedicatedMC
Comparison
Forge, Fabric or NeoForge: choosing a mod loader
What a mod loader does and where Forge, Fabric and NeoForge each fit, plus the honest answer to which is fastest: whichever your pack is built for.