UnifiedMetrics is a fully-featured free and open-source metrics collection plugin for Minecraft servers. The source code can be found on GitHub.
- 1.8+ Spigot servers
- Server metrics collection (TPS, MSPT, Players, Plugins)
- World metrics collection (Entities, Chunks)
- Events metrics collection (Player flow, chat, pings)
- JVM metrics collection (Memory, CPU Load, Threads, Uptime)
- Extensible API (Custom metrics, samples, metrics driver)
- More features upcoming (Logging to ElasticSearch, etc)
Read the wiki for instructions.