On 2023-05-05 21:14, Marc Millas wrote:
> Hi,
>
> postgres 14.2 on Linux redhat
>
> temp_file_limit set around 210 GB.
>
> a select request with 2 left join have crashed the server (oom killer)
> after the postgres disk occupation did grow from 15TB to 16 TB.
>
> What are the cases where postgres may grow without caring about
> temp_file_limit ?
>
> thanks,
>
Some OSes like IIRC RHEL9 now default to tmpfs for /tmp - if your temp
files are written in a tmpfs then it may may very well trigger the OOM
because of the temp file used up all RAM.
Check the filesystem type of your temp file's location.
--
Thomas