Fresh install of 16.04 on EC2 Nano instance, and kswapd0 takes most of
the CPU when running a job with high CPU and high IO.
I've resorted to running the following command every minute as a cron
task:
# m h dom mon dow command
* * * * * echo 3 > /proc/sys/vm/drop_caches
That works for 10 or 15 seconds, but after that kswapd0 comes back and
hogs the CPU again.
I'm using less than 20% of available memory, shouldn't need to swap.
See attached screenshot of top at the 25-second mark after dropping
caches.
** Attachment added: "Screenshot from 2016-05-19 15:25:29.png"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1518457/+attachment/4666557/+files/Screenshot%20from%202016-05-19%2015%3A25%3A29.png
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https://bugs.launchpad.net/bugs/1518457
Title:
kswapd0 100% CPU usage
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