How to make a lag report on a Minecraft server

Type perf start in the server console while the lag is happening. After 10 seconds a performance report is saved to the debug folder.

perf

Records 10 seconds of server performance data and saves a report to the debug folder.

/perf <start|stop>

Examples

perf start

From the console, starts a 10-second capture.

Arguments

start|stopRequired: Begin or end the capture.

What it does

start begins a profile that stops by itself after 10 seconds (or earlier with stop). The report is saved as an archive in the server's debug folder, useful when hunting lag or sending data to a developer.

Good to know

Needs operator permission level 4 (owner), the level op grants by default.

Run it on your server

On a SLASHPLAY server, type it in the Console tab without the leading slash; in game, operators type it in chat with the slash. New to this? Start a Minecraft server first.

Your own
Minecraft server.

Start a Minecraft server All commands

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