Slow rise in memory usage

[kolt]

Recently, I have started a Minecraft server for a game community. It is a survival/creative plots server on 1.15.2 with 58 plugins, hosted through Pterodactyl on a Ubuntu 18.04 virtual machine with 8cores/24GB of RAM, the Minecraft instance has 14GB allocated with unlimited CPU. I have been noticing that memory usage slowly rises until it crashes the server (it has crashed once so far). RAM usage reports in-game shows that the server doesn't use that much RAM as Pterodactyl is reporting the steady rise. For example,

Now I do not know much about running Minecraft servers, haven't done it in a good while, but it's clearly something with the memory and I don't know how to go about diagnosing.

The startup command is java -Xms128M -Xmx{{SERVER_MEMORY}}M -jar {{SERVER_JARFILE}} where server memory is set at 14000MB.

Any ideas? Thank you

 

[CyberSecGuy]

Timings is your friend. Especially on PaperSpigot.

/timings on

let the server go for a while. Longer the better.

/timings report
Paste the results here, I or someone else, will look it over.