How to find out what processes were killed by OOM on Linux

Problem

Services with high memory utilization are dying sporadically.

Solution

Run the following command to get a list of processes killed by oom.

dmesg | egrep -i 'killed process'

Useful articles:

1. How to troubleshoot OOM
https://access.redhat.com/solutions/2612861

2. How to add swap file to Linux Azure VM
https://support.microsoft.com/en-us/help/4010058/how-to-add-a-swap-file-in-linux-azure-virtual-machines

vi /etc/waagent.conf

ResourceDisk.Format=y
ResourceDisk.EnableSwap=y
ResourceDisk.SwapSizeMB=xx

service walinuxagent restart