Calling 'X' on 'FurnaceSplitter v2.7.1' took X ms
Calling 'OnServerSave' on 'FurnaceSplitter v2.7.1' took 447 ms, sometimes it takes 2500 ms.

Every 5 minutes flooding [Warning] Calling 'OnTick' on 'FurnaceSplitter v2.1.7' took 758ms [GARBAGE COLLECT]

Online 60-100. Server is lags.

In response to misticos ():
Calling 'OnServerSave' on 'FurnaceSplitter v2.7.1' took 447 ms, sometimes it takes 2500 ms.
It's very a lot of. Plugin need update.