Okay, so I think i've got somewhere. Time will tell if it works, but any errors have been cleared up in my Redis log file when restarting it.
Should anyone encounter the same issues, here's how I fixed the errors in the redis log as posted above. I'm using Ubuntu.
- I've added a 1GB swap file - this is pretty simple to do, and the link is to Digital Ocean. I've gone for a smaller swap file than my memory for now (which is 2GB).
- Fixed the vm.overcommit_memory problem - The error log (see above) gave perfect advice on which file to edit and then a redis reboot, editing etc/sysctl.conf and rebooting
- THP (Transparent Huge Pages) fix:
Entered these commands into the terminal:
echo never > /sys/kernel/mm/transparent_hugepage/enabled
echo never > /sys/kernel/mm/transparent_hugepage/defrag
Then edited /etc/rc.local to include the following, which disable THP on reboot:
if test -f /sys/kernel/mm/transparent_hugepage/enabled; then
echo never > /sys/kernel/mm/transparent_hugepage/enabled
fi
if test -f /sys/kernel/mm/transparent_hugepage/defrag; then
echo never > /sys/kernel/mm/transparent_hugepage/defrag
fi
Note - I added these before the line which said:
exit 0
Now, normally there's a crash through the night, so i'll update tomorrow if there's any further problems. But thanks @baris for the advice on a swap file, and hopefully if it all works someone else will find it useful.
