Re: [BUGS] BUG #14845: postgres_fdw and mysql_fdw can cause crash of instance

On 6 October 2017 at 13:24, <josef.machytka@gmail.com> wrote:
> After that in first case postgresql crashed (which was more or less OK
> because it restarted) but in second case the whole Debian instance crashed

What causes the crash, is it the out-of-memory (OOM) killer?
How have you configured overcommit on your Debian instance?

https://www.postgresql.org/docs/current/static/kernel-resources.html#linux-memory-overcommit

If it is the OOM killer killing your process, you may want to disable overcommit. Doing that should cause the client to get a decent error message instead of the the whole cluster being restarted.