Often users come to us with incidents of database crashes due to OOM Killer. The Out Of Memory killer terminates PostgreSQL processes and remains the top reason for most of the PostgreSQL database crashes reported to us. There could be multiple reasons why a host machine could run out of memory, and the most common [&]

https://www.percona.com/blog/why-linux-hugepages-are-super-important-for-database-servers-a-case-with-postgresql/