MSPT, milliseconds per tick, measures exactly what it sounds like: how long each individual server tick actually takes to process. Where TPS is a derived, somewhat smoothed-out average, MSPT is the more direct, more honest number, and increasingly the one experienced server admins check first.
The 50ms budget
Minecraft targets 20 ticks per second, which means each tick has a 50-millisecond budget to complete everything it needs to: entities, blocks, redstone, player actions, and everything plugins or mods hook into. MSPT staying under 50ms means the server is keeping up. Above 50ms means it is falling behind, and TPS will eventually reflect that, but MSPT shows it first and more precisely.
Why MSPT catches what TPS misses
TPS is calculated as a rolling average, which can, on some configurations, sit close to 20 even while individual ticks are running well past their 50ms budget, effectively hiding the problem behind an average that looks fine. MSPT does not have this blind spot, it reports tick duration directly.
How to check MSPT
Spark is the standard tool for this:
/spark tps
/spark health
These give you current MSPT alongside TPS. For deeper analysis, spark's profiler breaks down exactly what is consuming tick time.
The number that actually matters: 95th percentile
Rather than watching the average MSPT, the 95th percentile is the more useful figure, it tells you what 95% of your ticks were faster than, ignoring one-off outliers. If your 95th percentile MSPT sits consistently above 50ms, you have a real, ongoing problem even if the plain average still looks acceptable.
What pushes MSPT up
The same underlying causes as low TPS, since they are measuring the same underlying reality from different angles:
- High entity counts, see entity lag.
- Chunk loading and generation, see chunk lag.
- Garbage collection pauses, see GC lag.
- An inefficient plugin or mod, identified directly through spark's profiler.
Using MSPT to prioritize fixes
Because MSPT reflects tick duration directly, running a spark profiler session while MSPT is elevated is the most reliable way to see exactly what is eating that time, rather than guessing based on TPS alone. Our general lag-fixing guide covers what to do once you know the cause.
Building in headroom
A server requirements tool can help confirm your hardware matches what your world actually needs before MSPT becomes a recurring issue. Tick Hosting's plans are sized with that headroom in mind, starting with a free tier, from Tick Hosting's plans page.