How do I install LagMonitor?

Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. Download the .jar. Put it in the .minecraft/mods folder and launch that loader profile. Opens on Spigot — not every file is mirrored on our own servers.

What Minecraft version does LagMonitor work with?

The listing gives Minecraft 1.8, 1.9, 1.10, among others. This is the version stated by the author or source site, not something we verified ourselves.

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LagMonitor

⬇ Download on Spigot

Open in MC Java Mods Get it on Google Play →

Description

Gives you the possibility to monitor your server performance. This plugin is based on the powerful tools VisualVM and Java Mission Control, both provided by Oracle. This plugin gives you the possibility to use the features provided by these tools in Minecraft itself. This might be useful for server owners/administrators who cannot use the tools.

Furthermore it especially made for Minecraft itself. So you can also check your TPS (Ticks per seconds), player ping, server timings and so on.

If you like the project, leave a star on GitHub and contribute there.

Development-Builds

This plugin also supports newer Minecraft versions and is still updated. I moved away from doing fixed releases. Instead you can use development builds that are build directly after a change. Click on the left side on the build to download it or remove "changes" part of the URL to get always the latest.

https://ci.codemc.org/job/Games647/job/LagMonitor/changes

Features

Save Monitoring data into a MySQL database for webinterfaces
Many details about your setup like Hardware (Disk, Processor, ...) and about your OS
Player ping
Blocking operations on the main thread check (web requests, file reading, ...)
Thread safety checks
Sample CPU usage
Analyze RAM usage
Manage Java Flight Recordings - See this
Access to Stacktraces of running threads
Shows your ticks per second with history
Shows system performance usage
Visual graphs ingame
Ingame timings viewer
Access to Java environment variables (mbeans)
Plugin specific profiles
Open Source

Source code

https://github.com/games647/LagMonitor

Commands

https://github.com/games647/LagMonitor#commands

Permissions

https://github.com/games647/LagMonitor#permissions

Images

Heap command

Timing command

CPU Graph (blue=process, yellow=system) - Process load

Stacktrace and Threads command
[IMG]

Ping Command
[IMG]

Thread Sampler (Monitor command)

System command
[IMG]

Environment command
[IMG]

Heap usage graph (yellow=allocated, blue=used)
[IMG]

Commands

/lagmonitor — Gets displays the help page of all lagmonitor commands
/ping — Gets the ping of the selected player
/<command> [player]
/stacktrace — Gets the execution stacktrace of selected thread
/<command> [threadName]
/thread — Outputs all running threads with their current state
/<command> [dump]
/tpshistory — Outputs the current tps
/mbean — Outputs mbeans attributes (java environment information)
/<command> [beanName] [attribute]
/system — Gives you some general information (Minecraft server related)
/timing — Outputs your server timings ingame
/monitor — Monitors the CPU usage of methods
/<command> [start/stop]
/graph — Gives you visual graph about your server
/<command> [heap/cpu/threads/classes]
/environment — Gives you some general information (OS related)
/native — Gives you information about your Hardware
/vm — Gives you information about your Hardware
/network — Gives you information about your Network configuration
/tasks — Information about running and pending tasks
/heap — Heap dump about your current memory
/<command> [dump]
/lagpage — Pages command for the current pagination session
/<command> <next/prev/number>
/jfr — |
/<command> <start/stop/dump>

Plugin details

Plugin version 1.17
Author games647, https://github.com/games647/LagMonitor/graphs/contributors
Works with PacketListenerApi

Read from the plugin's own plugin.yml.

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft versions listed: 1.8, 1.9, 1.10
How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
Where to get it: Opens on Spigot — not every file is mirrored on our own servers.

Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.

LagMonitor is a free Minecraft Java mod. Compatible with Minecraft 1.8, 1.9, 1.10, 1.11 and newer. Downloaded 64,151 times (via Spigot). Download it and open it directly in the game.

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