Hey,
I have the problem that there seems to be items or other entities and causing the server to lag. So usually with 20 players online the server is running on 20 TPS with a mean tick time of about 25 ms.
But sometimes the TPS drop down to 3-5 for 5 to 15 minutes, especially when there is much PVP (so a lot of items dropping) going on.
I also got the LagFix mod and it sometimes helps. In most cases the "nukeitems" command brings the TPS back up but not always (maybe because e.g. xp orbs don't count as items). The entitycount while the server is lagging is also not very high.
So I would say that it's not the count of entities causing lags but a few that seem to be glitched in some way.
The server is also not running on 100% memory or CPU.
Running on forge-1.8-11.14.4.1577 (Yes 1.8 is old I know).
What can I do to resolve that problem?
Thank you very much for your help!