I'm also seeing this on 16.04 on an AWS nano (~0.5GB RAM). More than happy to help troubleshoot this if people let me know what info is needed.
Here's some basic info from my machine:
$ uname -a 4.4.0-22-generic #39-Ubuntu SMP Thu May 5 16:53:32 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
$ free -m total used free shared buff/cache available Mem: 486 73 140 20 272 362 Swap: 0 0 0
$ top top - 01:44:48 up 3 days, 2:34, 1 user, load average: 1.00, 1.01, 1.05 Tasks: 131 total, 2 running, 129 sleeping, 0 stopped, 0 zombie %Cpu(s): 0.0 us, 90.9 sy, 0.0 ni, 9.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st KiB Mem : 498480 total, 143612 free, 75852 used, 279016 buff/cache KiB Swap: 0 total, 0 free, 0 used. 370732 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 29 root 20 0 0 0 0 R 99.9 0.0 4066:36 kswapd0 1 root 20 0 37908 6028 4048 S 0.0 1.2 0:08.79 systemd 2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd ----- CUT THE REST -----
I'm also seeing this on 16.04 on an AWS nano (~0.5GB RAM). More than happy to help troubleshoot this if people let me know what info is needed.
Here's some basic info from my machine:
$ uname -a
4.4.0-22-generic #39-Ubuntu SMP Thu May 5 16:53:32 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
$ free -m
total used free shared buff/cache available
Mem: 486 73 140 20 272 362
Swap: 0 0 0
$ top
top - 01:44:48 up 3 days, 2:34, 1 user, load average: 1.00, 1.01, 1.05
Tasks: 131 total, 2 running, 129 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.0 us, 90.9 sy, 0.0 ni, 9.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 498480 total, 143612 free, 75852 used, 279016 buff/cache
KiB Swap: 0 total, 0 free, 0 used. 370732 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
29 root 20 0 0 0 0 R 99.9 0.0 4066:36 kswapd0
1 root 20 0 37908 6028 4048 S 0.0 1.2 0:08.79 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd
----- CUT THE REST -----