High CPU usage with kswapd0 (Ubuntu)

[RileyTheFox]

Hey. Over the past few days my VPS has been pinned to 100% CPU usage by the process 'kswapd0'. Using the top command, this is the information I get:

 

The user sidney is just a friend's user account, and the kswapd0 issue only occurs from there. I tried deleting the user account and remaking it (in case there was anything that got corrupted) and after deletion, the problem was solved. But soon after recreation the problem arose again.

 

Multiple sources online tell me to run "echo 1 > /proc/sys/vm/drop_caches" but this also achieves nothing. The system is consistently pinned to 100%. I dabbled in killing the kswapd0 process, and that solved the problem, however that means swap is no longer running (and it could be unstable too?)

 

This has only started happening since around a week ago. I've tried a kernel upgrade to see if that would solve anything but nothing worked. Even the VPS company's support couldn't help me after so long.

 

Does anyone have any solution to this? Thanks.